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AgriLife Extension hires new small grains specialist

26Mar

By: Kay Ledbetter

The Texas A&M AgriLife Extension Service has hired Fernando Guillen, Ph.D., as the new statewide small grains and oilseed crops specialist in the Department of Soil and Crop Sciences at Texas A&M University. He officially started March 1.

Fernando Guillen Portal

Fernando Guillen, Ph.D., is the new Texas A&M AgriLife Extension Service statewide small grains and oilseed crops specialist. (Texas A&M AgriLife photo by Beth Ann Luedeker)


“Dr. Guillen brings a wealth of agronomic experience to AgriLife Extension’s small grains program, and we are excited to have him joining our department and extension unit,” said Larry Redmon, Ph.D., associate department head and AgriLife Extension program leader for the department.
Guillen brings experience
Coming to Texas from Bozeman, Montana, Guillen was a private consultant and a research associate at Montana State University. He earned his master’s and doctorate degrees from the University of Nebraska, Lincoln, and his bachelor’s degree from the Juan Misael Saracho Bolivian University in Bolivia. He also was a postdoctoral research scientist at the Northwestern Agricultural Research Center for Montana State University, Kalispell, Montana.
His past research relates to the development and application of new ways to better understand relative changes in cultivar productivity as a result of varying growing conditions in a target region, also known as genotype-by-environment interactions.
Also, Guillen said he includes using innovative crop management protocols to increase crop productivity in his research. Examples would be the use of integrated pest management strategies for weed control and the use of micronutrients as yield enhancers in wheat.
Guillen’s plant breeding activities include developing varieties in corn and wheat, as well as grain amaranth and camelina crops. Most recently, he led the camelina breeding program at Sustainable Oils LLC for the development of superior cultivars to be used as a feedstock for biofuel production. He also worked with their wheat tilling research program at Targeted Growth Inc., which was aimed at identifying specific, proprietary mutation-altered genes with a positive impact in yield.
Guillen’s plans for Texas position
“I believe the Texas small grains specialist position is a strong match between the position’s objectives and my professional background,” Guillen said. “Even before applying for this position, I knew the small grains breeding program at Texas A&M was doing a superb job in the development of superior cultivars in small grains, mainly wheat, for the different wheat growing regions in Texas.
“From a genetic perspective, I was glad to see that the small grains breeding program is already implementing state-of-the-art strategies like the use of gene-editing tools with the ultimate goal of yield enhancement,” he said.
Guillen said it is well recognized that increases in crop productivity arise from the use of both superior genetics and the adoption of optimum crop management protocols for commercial production.
“Thus, my interest falls into defining and using crop management protocols that allow the maximization of productivity of elite wheat cultivars developed for Texas, which in essence consists in closing the gap between the yield potential of a cultivar under optimum growing conditions and the observed yield of a cultivar at the farm level,” he said.
AgriLife Extension outreach needed
“This will require a precise measure of the observed yield gap in the target regions,” he said. “It also requires identifying the major underlying factors explaining the gap, adopting crop management protocols conducive to directly or indirectly reducing the gap, and effectively transferring the technology to the farm.”
To accomplish this, the involvement of agronomists, specialists, plant breeders, soil scientists, plant pathologists, weed scientists and economists is needed, which can be seen as a challenge, he said. “But I prefer to see it as a unique opportunity instead.”
The bottom line is it is one thing to know what is required and another to get the farmers to use it, Guillen said.
“That requires a transfer of technology, and that is where AgriLife Extension is important,” he said.
Other grains and oilseeds
Guillen said his focus will not be on wheat alone. He will work with oats, barley and other small grains as well as oilseed crops such as camelina and canola.
“I have a lot of experience in camelina and collaborated on it with Dr. Gaylon Morgan here in Texas in the past,” he said. “I will try to reintroduce it in those areas where we believe there is potential and also work with canola if the opportunity arises.”
Guillen said when he first started working with camelina in Montana, no one knew anything about the crop, “so we had to show farmers how to grow it through Extension practices. I plan to use that same Extension networking to work with all the important crops here in Texas.”

Aggie professor helps law enforcement find answers in the soil

26Mar

We have seen them on TV, the crime scene investigators who sift through the minutia to help law enforcement personnel determine what took place.

Dr. Jacqui Aitkenhead-Peterson fills this role for those in Texas law enforcement looking for soil-borne answers.

two people talking

Dr. Jacqui Aitkenhead-Peterson discusses soil samples with an officer during a recent investigation.

An Associate Professor in the Texas A&M University Department of Soil and Crop Sciences, Peterson’s research focuses on nutrients in soil and water in human dominated ecosystems. Her research projects include urban irrigation run-off; extractable soil nutrients under tillage and cropping treatments; and investigation of carbon and nutrients released from decomposing mammals – primarily humans.

It is the latter for which she has become one of the go-to sources for law enforcement.

student behind crime scene tape

Aitkenhead-Peterson’s forensic soil science class includes a mock crime scene at which students find evidence and take soil readings.

For the past 6 years, she has been helping law enforcement discover the importance of matching soil from crime scenes and suspects or determining evidence of human decomposition products in soil.

In 2008, following a call from the Soil Science Society of America to increase undergraduate numbers in Soil Science, Peterson decided to develop and offer a Forensic Soil Science class. The first year, the class include included a field trip to the Huntsville donor facility.

“The extremely high concentrations of carbon, nitrogen and phosphorus from decomposing donors prompted my research and subsequent articles on this topic,” Peterson said. “Volunteering my expertise in sampling soil and on-site chemical analyses of soil at decomposition workshops for law enforcement or other practitioners led to initially helping to examine soil from cold cases and, more recently, active cases in Texas.”

dog sniffing one in a series of cans

Dogs sniff a series of cans containing either controls or crime scene soil to determine if further testing is warranted.

Earlier this year, when asked to help locate remains for an ongoing case, Peterson called in some canine reinforcements.

Trained by Dr. Ben Alexander, an instructor in the Texas A&M University Department of Biology and a visiting professor and K9 training coordinator at Texas State University’s Forensic Anthropology Center, the human remains detection (HRD) dogs “hit” on certain smells that are often undetectable to humans. They are a valuable tool, Peterson said.

“Dogs have a significantly higher sensitivity than the equipment in my lab,” Peterson said. “Sometimes the volume of soils delivered is high and so it is useful to have trained HRD dogs to alert for human remains before the time consuming chemical analyses is performed. If the HRD dogs show some interest then the next step is to scan sub-samples of the soils using UV-Vis-near infrared spectroscopy.”

“The diffuse reflectivity of decomposition-contaminated soils is significantly lower than soils collected as controls,” she said. “Statistical analyses will show whether it is worthwhile to continue on with wet chemical analyses to determine chemical markers for human remains.”

dog laying beside one of several cans in a row

A human remains detection (HRD) dog signals a “hit” to her handler, Ben Alexander, as Dr. Jacqui Aitkenhead-Peterson looks on.

Recently, three HRD dogs examined soil evidence, for redundancy purposes, and then Peterson tested the soils in her lab.

Information passed on to the investigators may help them find where a victim is buried, or provide other crucial information.

Aggies who wish to learn these techniques enroll in Peterson’s Forensic Soil Science Course, a three credit-hour course in which they learn soil and geologic characteristics associated with crime scene examination, and much more. This course draws numerous budding scientists each semester.

Conservation and sustainable agriculture highlighted at field tour

26Mar

by Beth Ann Luedeker

plants growing in field

A seeding rate trial including mustard, oat, and winter pea is one of the research projects currently underway in the Brazos bottom. (Texas A&M AgriLife photo by Beth Ann Luedeker)

Conservation and sustainable agriculture practices aim to address our world’s need for food and fiber products with minimal impact on the soil and available water resources. Farmers who implement these practices may qualify for federal funding if certain standards are met.

The standards are set by the National Resource Conservation Service (NRCS), based on land grant university research, and disseminated to producers through the NRCS and Texas A&M AgriLife Extension efforts.

group of people looking at mustard plants

Texas A&M AgriLife Extension specialist Jake Mowrer, Ph.D., discusses a a research project he is conducting with mustard. (Texas A&M AgriLife photo by Beth Ann Luedeker)

To help facilitate the communication between these groups, Jake Mowrer, Ph.D., held a “train the trainers” conservation and sustainable agriculture field tour at the Texas A&M University farm in College Station March 3. The workshop was designed to help them better promote the adoption of sustainable agriculture practices.

“Texas is lagging behind other states in the adoption of sustainable practices. Communicating the most current research to the scientists that work directly with farmers is key to changing practices,” said Mowrer, an Assistant Professor and AgriLife Extension Specialist in Soil Nutrient & Water Resource Management in the Department of Soil and Crop Sciences.

people looking at research plots

Field day participants had an opportunity to tour a trial containing 26 different cover crop species. (Texas A&M AgriLife photo by Beth Ann Luedeker)

“More than fifty percent of the ag and natural resource county agents have less than five years of experience, and many could use more depth of training in our ag sciences,” he said. “There are many who were not raised on farms and whose degree training does not cover the breadth of the ag sciences.”

Mowrer points to the wide variety of agricultural enterprises across the states and the varying needs of the counties.

He believes that providing regionally relevant workshops will help ensure that those who are assisting the state’s producers are aware of current research that will best address those producer’s needs.

group of people in field by device that captures emmissions from soil

Research being led by Diana Zapata, Ph.D., and Nithya Rajan, Ph.D., was of particular interest to participants at the field tour. The trial compares CO2 emissions, crop yield, and biomass productivity in organic and conventional corn and sorghum production. (Texas A&M AgriLife photo by Beth Ann Luedeker)

At the March 3 workshop, 47 people from AgriLife Extension Districts 9 and 11, NRCS zones 3 and 4, and Prarieview A&M University Extension took part.

Mowrer plans to hold another workshop at the Stiles Farm in Thrall, TX, on summer cover crops, double cropping, and tillage practices. Derrick Banks, Fort Bend County Extension agent for agriculture and natural resources, plans to hold one at PVAMU later in the spring.

These workshops are funded by a grant from Southern Sustainable Agriculture Research and Education (SARE).

group of people in field

Texas A&M AgriLife Research Specialist Daniel Hathcoat discusses research on the suitability of 26 different cover crop species based on biomass, weed suppression and impact on soil moisture. (Texas A&M AgriLife photo by Beth Ann Luedeker)

Texas A&M AgriLife researcher Bagavathiannan receives weed science society Early Career Outstanding Scientist Award

17Mar

By: Kay Ledbetter

Muthu Bagavathiannan

Muthu Bagavathiannan, Ph.D. (Texas A&M AgriLife photo)

Texas A&M AgriLife researcher Muthukumar Bagavathiannan, Ph.D., was honored with the Early Career Outstanding Scientist Award by the Weed Science Society of America, WSSA, recently at the society’s annual meeting in Maui, Hawaii. WSSA is the premier weed science society in the U.S. and this is the highest recognition for an early career scientist by the society.

The early career award is presented to scientists within the first 10 years of their career past their doctorate who have demonstrated originality and creativity and who have made a notable contribution to weed science with potential for continued excellence.

Bagavathiannan makes a difference at Texas A&M

“Dr. Bagavathiannan has been leading the way not only here at Texas A&M, but throughout the U.S. and worldwide to address the collective issue of weed management across agricultural and natural landscapes,” said Patrick Stover, Ph.D., vice chancellor of Texas A&M AgriLife, dean of the College of Agriculture and Life Sciences and director of Texas A&M AgriLife Research. “He is definitely an asset on our faculty and will help our agencies tackle future weed management issues. This is a well-deserved recognition.”

Bagavathiannan joined the Texas A&M University Department of Soil and Crop Sciences as a tenure-track weed science faculty member in 2014 with an AgriLife Research appointment. He has since established a rigorous research group that is gaining national and international recognition in weed science research.

“Dr. Bagavathiannan has served as a spark for our weed science program at Texas A&M,” said David Baltensperger, Ph.D., soil and crop sciences department head. “The timeliness of the expertise he brings has been exceptional as he was an author or co-author on more than 15 presentations and posters and his students were recognized for first and second outstanding poster at the recent WSSA meeting.

“Dr. Bagavathiannan has had a huge impact on our department, through training the next generation of scientists in emerging weed science issues while focusing on solutions for Texas producers.”

Bagavathiannan earned an agriculture and agronomy bachelor’s and master’s degree from the Tamil Nadu Agricultural University in Coimbatore, India, as well as a master’s in plant genetic manipulation from the University of Nottingham, Sutton Bonington, England and his doctorate in weed ecology from the University of Manitoba, Winnipeg, Canada.

With research interests in the broader area of weed science and agronomy, his particular emphasis is on weed ecology and management. With the threat of herbicide-resistant weeds, the goal of his research program is to understand the evolutionary biology and dynamics of herbicide resistance in weed communities and develop integrated weed management solutions for effectively targeting weed seedbanks. Notably, his program utilizes digital technologies in precision weed detection, management and ecology.

Bagavathiannan has published over 65 peer-reviewed journal articles, 10 book chapters and several outreach bulletins. He has already mentored three doctorate students, three master’s students, four postdoctoral researchers, two research assistants, five visiting scholars, 12 student interns and eight undergraduate researchers. He is currently mentoring seven doctorate students, two master’s students, a visiting scholar, a student intern and two undergraduate researchers.

Career contributions, accomplishments

Bagavathiannan currently leads a multi-state National Institute of Food and Agriculture, NIFA, Specialty Crop Research Initiative-funded research project on annual bluegrass management, a Beltwide Palmer amaranth seedbank management project funded by Cotton Incorporated, a project investigating gene flow between sorghum and johnsongrass funded by NIFA-Biotechnology Risk Assessment Research Grants Program and USDA-ARS, a harvest weed seed control project as well as a weed resistance management decision-support tool development funded by the NIFA-AFRI Foundational program, a weed-resistance management decision-support tool development funded by the Crop Protection and Pest Management program, and an organic cotton project funded by the NIFA-ORG program.

He is also a co-investigator in a number of projects that are currently ongoing or recently completed at the state and national levels.

He collaborates broadly at local, regional, national and international levels on a number of research projects focusing on integrated weed management. He is an active member of the Getting Rid of Weeds, GROW, and Precision Sustainable Agriculture teams led by Steve Mirsky, Ph.D., U.S. Department of Agriculture-Agricultural Research Service, USDA-ARS.

Examples of his leadership and professional services noted include the chair of the WSSA herbicide-resistant plants committee, an associate editor for the Weed Science and Crop Science journals and a panel member/reviewer for a number of U.S. Department of Agriculture-National Institute of Food and Agriculture grants. He co-chaired the Weed Biology and Ecology section of the 2016 WSSA annual meeting in Puerto Rico and chaired the 2017 meeting in Tucson, Arizona. He also chaired the Weed Science and Growth Regulation session of the 2016 Rice Technical Working Group meeting in Galveston.

He chaired the Weed-Crop Interactions and Allelopathy sessions at the 2016 International Weed Science Congress held at Prague, Czech Republic, and co-organized a Workshop on Weeds and Invasive Species held at Alberta, Canada in June 2016. He will cahir the New Technology session at the 2020 International Weed Science Congress to be held in Bangkok, Thailand. And, he was an invited speaker at the 2018 Brazilian National Weed Science Congress at Rio De Janeiro; the 2018 Indian Society of Weed Science Congress at Jabalpur, India; the 2020 machine learning workshop for weed detection at Wagga Wagga, New South Wales, Australia; and the 2020 AAAS symposium on herbicide-resistant weeds at Seattle.

Bagavathiannan is also a recipient of the Dean’s Outstanding Early Career Research Award and the Vice Chancellor’s Outstanding Early Career Research Award from the College of Agriculture and Life Sciences, Texas A&M University.

Straw joins Department of Soil and Crop Sciences faculty at Texas A&M University

25Feb

Dr. Chase Straw has joined Texas A&M University and Texas A&M AgriLife Research as an Assistant Professor in the Department of Soil and Crop Sciences turfgrass program. He will be assuming the duties of retired professor Richard White in a tenure track position which is 30% teaching and 70% research.

Straw comes to College Station from St. Paul, Minnesota, where he held a postdoctoral position in the University of Minnesota Department of Horticulture.

Chase Straw

Dr. Chase Straw has joined the Turfgrass Science faculty at Texas A&M University.

A native of Frankfort, Kentucky, Straw earned his Bachelor of Science degree in Plant and Soil Sciences (Turfgrass Science) from the University of Kentucky. He then went on to earn both his Master of Science and Ph.D. in Crop and Soil Science (Turfgrass Science) from the University of Georgia.

“My primary research interest focuses on precision turfgrass management,” said Straw. “This involves interdisciplinary approaches aimed at understanding the spatial and temporal variability of turfgrass systems in order to develop practical strategies for reducing management inputs and improving the overall user experience.”

He also conducts general turfgrass management and physiology research that addresses issues faced by the turfgrass management professionals and the turfgrass industry as a whole.

Straw’s teaching role will begin with the fall 2020 semester. He will teach undergraduate courses in turfgrass management systems (SCSC-429) and turfgrass maintenence (SCSC-430) and oversee undergraduate research (SCSC-491). He will also join Dr. Ben Wherley to co-teach Professional Development in Turfgrass Science (SCSC-312).

Until then, Straw will be focusing on his research and forming relationships with collaborators throughout Texas. He will also co-advise the Aggie Turf Club and turf students.

“I am extremely excited to be in this position at Texas A&M,” Straw said. “I look forward to meeting and getting to know everyone in the department.”

Straw is a member of the International Society of Precision Agriculture, Turfgrass Producers International (TPI), Crop Science Society of America (CSSA), the Sports Turf Managers Association (STMA) and the Golf Course Superintendents Association of America (GCSAA).

While a graduate student, he received the Chris Stiegler Turf Science Fellowship from CSSA. He received the Dr. James Watson Scholarship from the STMA as both a graduate and undergraduate.

Graduate student earns trip to the nation’s capital

25Feb

Rahul Raman, a doctoral student under Dr. Nithya Rajan, has been selected as one of 18 graduate students nationwide to receive the 2020 Future Leaders in Science Award. The award will be formally presented March 2, 2020, in Washington D.C..

The award includes a trip to participate in the annual Congressional Visits Day, hosted by the Agronomy Society of America (ASA), Crop Science Society of America (CSSA) and Soil Science Society of America (SSSA), on March 3.

Rahul Raman

Rahul Raman has been selected as a 2020 Future Leader in Science.

During the visit, the participants will meet with members of Congress and advocate for food, agriculture and natural resources research.

Last fall, Raman and two other Texas A&M students were selected to participate in the Scientists Engaging and Educating Decisionmakers (SEED) ambassador program.

“My previous experiences as a Climate Science Advocate in Washington D.C. and as a SEED Ambassador will help me to discuss the gaps between science and policy effectively, and to help come up with ideas to merge that gap,” Raman said. “My intent towards this award was to get connected with policy-makers, understand the congressional legislative process, and then work with them on issues related to agricultural research and funding.”

After completing his Ph.D., Raman plans to return to India and work toward global food security with an international agency such as CGIAR/UN.

“For global food security, research is important,” Raman said. “But better policies and funding towards research are also important to achieve this goal.”

In many African and Asian countries, including India, food security is an issue. Raman believes that involvement with policy makers in the United States will help him better understand the processes and policies of other countries and organizations as well.

“My science advocacy experiences will help me to better communicate my work to policy-makers back in India, and to plan accordingly for the resources I will need to conduct my work,” Raman said.

Soil and Crop Sciences faculty mentor Borlaug Fellows from Egypt

25Feb

Researchers from Egypt spent several months in Texas last fall working with faculty from the Department of Soil and Crop Sciences at Texas A&M University as part of the Borlaug International Agricultural Science and Technology Fellowship Program.

Dr. Samir Mohamed worked with Dr. Jake Mowrer; and Anas Mohamed Safaa Al-Din Sharshar teamed up with Dr. Amir Ibrahim.

four men in front of a building

The Borlaug Fellows and their mentors (l-r) Jake Mowrer, Samir Mohamed, Amir Ibrahim and Anas Mohamed Safaa Al-Din Sharshar.

Samir is an Associate Professor in the Department of Agricultural Microbiology at Minia University, Minia, Egypt, with a focus on soil/plant/microbe/environment interactions. Several of his current projects investigate the effects of biochar.

“Through this fellowship I hope to improve my understanding of the nexus of leguminous crop production under arid/semiarid condition, biochar amendments to the soil, and legume/rhizobia nitrogen fixation,” Samir stated. “I also expect to learn new technologies to measure plant performance and rhizobia bacteria activity.”

man looking at bare roots of a plant

Samir looks for nodules on the roots of a legume plant in one of the research projects he is conducting with Dr. Mowrer.

Samir also hopes to expand his Extension programming to communicate new practices to the local farmers.

Anas is a wheat researcher at the Agriculture Research Center, Field Crop Research Institute in Giza, Egypt.

“The Borlaug program will give me a chance to recognize the new techniques in wheat breeding, both traditional and molecular marker breeding,” said Anas. “I will also benefit from the seminars and lectures, and make new friends from a different country.”

The Fellows returned home in December, but the program does not end there.

man in greenhouse holding potted ryegrass

Anas worked in the greenhouse conducting salinity research in ryegrass with Dr. Ibrahim.

“We will continue to communicate with each other and pursue opportunities for future collaboration,” said Mowrer. “We will also co-author a manuscript for publication based on the research we performed together.”

Borlaug International Agricultural Science and Technology Fellowship is a program of the USDA Foreign Agricultural Service aimed at promoting food security and economic growth by providing training and collaborative research opportunities to fellows from developing and middle-income countries.

two men looking at a plant

Dr. Jake Mowrer and Samir Mohamed measure the root mass of a legume plant in their research project.

New app development could aid crop irrigation management

25Feb

By: Kay Ledbetter

Texas A&M AgriLife is developing an inexpensive and easy-to-use mobile app and irrigation management system to help agricultural producers increase water-use efficiency and continue producing cotton.

The new project is funded by the Texas A&M Water Seed Grant Initiative and is titled “A Novel Sensor- and Crop-Model-Based Decision Support Tool for Efficient Irrigation Management.”

linear irrigation system with sprinkler heads close to ground

Increasing water-use efficiency in cotton will be the focus of a new study at the Texas A&M AgriLife Research and Extension Center at Vernon. (Texas A&M AgriLife photo by Kay Ledbetter)

The app is being developed in the Texas Rolling Plains region, which produces about 13% of the state’s cotton, said Srinivasulu Ale, Ph.D., Texas A&M AgriLife Research geospatial hydrologist and lead investigator on the project in Vernon.

Yet that cotton production faces challenges from recurring droughts and declining groundwater levels in the Seymour Aquifer. Furthermore, projected warmer and drier weather in the future will require larger groundwater withdrawals to meet crop water demands, Ale said.

To sustain cotton production in this region, he said, producers must adopt water-use efficient irrigation strategies.

Design & Development of Mobile App

Joining Ale on the project will be Curtis Adams, Ph.D., AgriLife Research crop physiologist; Emi Kimura, Ph.D., Texas A&M AgriLife Extension Service agronomist; and Yubing Fan, Ph.D., AgriLife Research postdoctoral research associate, all in Vernon. Also, Jim Wall, Ph.D., executive director, and Keith Biggers, Ph.D., director of computing and information technology, both at the Texas A&M Center for Applied Technology, College Station, will provide expertise.

The project is partnering with the Gateway Groundwater Conservation District, Quanah, and the Rolling Plains Cotton Growers Inc., Stamford.

weather station

Weather data collected in the field over the growing season will be used to help identify the proper irrigation management strategy. (Texas A&M AgriLife photo by Kay Ledbetter)

“Our goal is to deliver a product to cotton producers that can greatly improve their irrigation management, but is simple and accessible,” Adams said.

Most irrigation support tools have limitations that make them less useful to producers in some way, he said, and this project’s goal is to improve upon existing technologies using a novel approach.

“Our app will collect crop information from sensors mounted on center pivot systems, use weather data from online sources, and provide a number of potential combinations of real-time updated deficit- or full-irrigation schedules and economic outcomes,” Biggers said. “Producers can choose an irrigation strategy that best suits their well capacities and expected returns.”

This field information will be used in conjunction with the historic and projected short-term future weather data over the growing season in crop and economic models to estimate projected cotton yield, irrigation levels and net returns under different irrigation management strategies.

Considering short- and long-term weather forecasts

“To our knowledge, none of the existing apps use projected short-term weather forecasts in generating real-time irrigation schedules, and our proposed app does that,” Ale said.

Once validated using data from a field experiment, the proposed system will be further evaluated by selected producers under different crop conditions, soils, irrigation capacities and weather.

Wall said their plan is to have the app developed by the end of this year, test it in producers’ fields in 2021 summer, and release it in fall 2021.

Kimura estimates if producers adopt the tool on 200,000 acres of irrigated land in the Rolling Plains, it could potentially save millions of gallons of groundwater and extend the economic life of the Seymour Aquifer.

“But we don’t think its viability will be limited to the Rolling Plains,” Ale said. “We expect the proposed system to allow modifications to include other row crops and for use in other crop production regions of Texas and beyond.”

Glyphosate myths, facts addressed

24Feb

By: Kay Ledbetter
Contact: Scott Nolte – scott.nolte@tamu.edu

Whether on social media or in farming circles, many questions linger about glyphosate, better known as Roundup, and a link to cancer.

“It’s hard to know what to believe, but it’s important to make sure the information you receive is based on good science,” said Scott Nolte, Ph.D., Texas A&M AgriLife Extension Service state weed specialist, College Station.

Nolte addressed the issue during the Panhandle Farm Management Symposium in Amarillo recently, providing insight into the “myths and truths” surrounding the issue.

The controversy began with a ruling in 2015 by the International Agency for Research on Cancer, IARC, a subgroup of the World Health Organization tasked with determining the potential of a product to be carcinogenic. IARC indicated there was limited evidence glyphosate is carcinogenic in humans and sufficient evidence in animals.

However, because risk assessment and certain key studies were not considered by this organization, this year the U.S. Environmental Protection Agency released a statement Aug. 8 saying it would no longer approve product labels claiming glyphosate is known to cause cancer. The Agency said it is a false claim that does not meet the labeling requirements of the Federal Insecticide, Fungicide and Rodenticide Act.

Glyphosate use and regulation

Nolte said glyphosate has been in use since the mid-1970s and is the most studied chemical ever.

“Glyphosate, or Roundup, is a very effective herbicide that works on grasses and broadleaf weeds,” he said. “It works by inhibiting an enzyme that prevents plants from making three key amino acids needed to grow. This enzyme is not found in humans or animals, so it does not hurt them.”

Pesticides such as glyphosate are regulated by the EPA; the Food and Drug Administration, FDA; and the U.S. Department of Agriculture, USDA. These regulatory agencies determine safe residue levels and regulate tolerances.

They determine exposure risk through residue in food, water, residential use and occupational use, Nolte said. Two criteria they use are lowest observable adverse effect level and no observable adverse effect level. They set the chronic reference dose, which is an estimate of a daily oral exposure for a chronic duration to the human population that is likely to be without an appreciable risk of deleterious effects during a lifetime.

“Studies are conducted to get an observable effect and then they cut it back 100-fold to ensure if you are exposed on a daily basis to a chemical, chronic duration, it is without appreciable risk of effects during a lifetime,” he said.

How do we know Roundup is safe?

“Nothing is guaranteed to be 100% safe,” Nolte said. “But glyphosate is the most studied chemical in use today. None of the scientific studies have been able to definitively tie glyphosate to the cancer risks it’s been tied to.”

He said studies show the relative toxicity of glyphosate is just slightly higher than Vitamin B2 and far lower than Vitamin D3.

“Just about everything can be toxic in sufficient quantity – water, salt, organic pesticides, aspirin, caffeine, even sunscreen approved for babies – so it’s all relative,” he said. “Every day we weigh the risk with the benefits, whether it is driving to work or flying on an airplane.”

“You are responsible for good stewardship and following the label of all chemicals used,” he said. “So, handle it properly.”

Each chemical is required to have a signal word on it to determine its toxicity:
– “Danger, poison” indicates the product is highly toxic by any route into the body.
– “Danger” means it can cause severe eye damage or skin irritation.
– “Warning” indicates it is moderately toxic orally, dermally or through inhalation. Moderate eye or skin irritation.
– “Caution” means the product is slightly toxic orally, dermally or through inhalation. Slight eye or skin irritation.

“In this ranking system, only the word ‘caution’ is used on Roundup. You have to read and follow the label.”

What does science tell us about Roundup?

When IARC came out with their ruling on glyphosate in 2015, they knew about some additional data that would have been useful in making their decision. However, since it was not printed yet, they did not take it into consideration.

“It’s extremely challenging to talk in absolutes,” Nolte said. “There are too many things at play. But based on scientific evidence at this point, statistically, there is no tie between glyphosate and cancer. It’s usually never one thing that is involved in causing cancer, so that doesn’t mean in an individual situation where someone was predisposed to cancer that the chemical didn’t play a role.”

The piece of missing information was the Agricultural Health Study, funded by the National Cancer Institute and the National Institute of Environmental Health Sciences in collaboration with EPA.

Considered one of the largest human health studies done, it has been following people for 20 years who are chemical applicators using glyphosate or their spouses. The conclusion of this large, prospective cohort study was “no association was apparent between glyphosate and any solid tumors or lymphoid malignancies overall.”

“You can decide if it is right for you to use or not,” Nolte said. “Genetic probability likely has as much or more to do with someone getting cancer as the environment. And science tells us if we use these things properly, the risk is extremely low. The label is the law. Follow it.”

FFA Agronomy Contest scheduled for March 28

12Feb

The Department of Soil and Crop Sciences at Texas A&M University is hosting an Invitational Agronomy Contest for FFA members, Saturday, March 28, 2020, in College Station. The contest will include a general exam as well as testing the students knowledge in plant identification, pest identification and soils.

The contest will be based on the Texas FFA format and rules.

More information is included on this flyer:

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