Temperature inversion and herbicide applications

The following tips were presented in a Delta Farm Press article related to the dicamba drift debate. Because some herbicide labels include instructions about not applying during a temperature inversion, I am including the tips below. You can read the entire article in Delta Farm Press.

Here are eight things about temperature inversion based on University of Missouri research you should know now. Continue reading

More precautions needed when spraying with dicamba and 2,4-D

From the Weed Science Society of America

New resistant soybean and cotton cropping systems based on the synthetic auxin herbicides give farmers new options for managing Palmer amaranth and other broadleaf weeds resistant to glyphosate. But scientists with the Weed Science Society of America (WSSA) say special precautions are necessary. Auxin herbicides are known to drift and to cause harm to sensitive, off-target broadleaf plants.

“Concerns about drift led the U.S. EPA to issue time-limited registrations for the auxin herbicides dicamba and 2,4-D of two years and five years respectively,” says Kevin Bradley, Ph.D., past president of WSSA and associate professor at the University of Missouri. “The approved product labels have considerable detail on management of drift and other risks and must be carefully followed to reduce off site movement. Unless growers show they can use these herbicides as labeled, the registrations could easily be revoked.” Continue reading

Weeds could develop resistance to dicamba in three generations

In Delta Farm Press

What happens if farmers follow the same practices they have when other new herbicide chemistries have come on the market over the last several decades?

If they’re not careful, they will simply replace one herbicide with another, as they did with Prowl and Treflan, ALS herbicides, glyphosate and most recently with PPO inhibitors such as Flextar and Reflex. Continue reading

Growers must be careful when using new herbicide technologies

In Delta Farm Press

Rules surrounding new weed-fighting technologies don’t make for a short, or uncomplicated, list, says Ples Spradley.

First off, “Applications of products (Xtendimax, Enlist Duo and Engenia) shall not be made to Enlist or Xtend seed technologies without’” completing new training, the Arkansas Extension pesticide safety education specialist told the crowd at the recent Pigposium 3 in Forrest City, Ark. “If you’re an applicator – private, commercial, non-commercial or commercial applicator technician – and will use those herbicides on those technologies, you must go through our training. The new regulations state that you cannot apply Xtendimax in Arkansas between April 15 and September 15, with a limited exception for pasture applications.” Continue reading

There’s no simple solution to weed control

“Those who cannot remember the past are condemned to repeat it,” said George Santayana in The Life of Reason. That quote seems fitting to apply to weed scientist Eric Prostko’s warning to growers about overusing herbicide-resistant technology in the absence of other non-chemical weed management. He authored an article in Southeast Farm Press named “7 lessons learned from the ‘glyphosate era’ we must remember.”

Prostko recalls the development of glyphosate-resistant crops that exploded in the US, leading to some of the worst cases of glyphosate-resistant weeds developing because of resistance. Now, he says, growers face another possible era of herbicide resistance, due to auxin-resistant, or AR, crops. Continue reading

Why people resort to the silver bullet: using psychology to teach IPM

I’ve had many discussions with my colleagues about the best way to sell integrated pest management, or IPM, to the public. Although I don’t usually work with people directly on their pest management practices, I have heard some of our IPM Coordinators say, and have read in several news articles, that IPM is easier to sell to some people than to others. Why is that? Why is the organic community so successful at selling organic goods to the general public, while most people I know outside of my job don’t know what “IPM” stands for?

The answer may lie in an article that appeared in Perspectives on Psychological Science in 2015, titled “Improving Public Engagement With Climate Change: Five ‘Best Practice’ Insights from Psychological Science.” Although the article focuses on climate change policymaking, we can use similar principles in IPM to assist our “integrated people management,” as some of my school IPM colleagues call it. Continue reading

EPA Registers Dicamba Formulation for Use on Dicamba Tolerant Crops

EPA is registering a dicamba formulation, Xtendimax™ with Vapor Grip™ Technology, which is specifically designed to have lower volatility, to control weeds in cotton and soybean crops genetically engineered to tolerate dicamba.

This registration is for a formulation of dicamba that contains an additive that reduces volatility. This formulation is different from the products that are alleged to have been recently used illegally. EPA continues to investigate these issues in several locations in the Midwest. Continue reading