We are having a Palmer pigweed heart attack
The current control measures in soybeans typically include using post-emerge PPO mode-of-action herbicides such as Flexstar, Cobra and Blazer, but these need to be applied when the weed is two inches tall. Control of two-inch resistant Palmer pigweed usually results in 95 percent control, but if the weed is allowed to reach four inches before the herbicide application then the result is only about 75 percent control. Naturally, control continues to decrease drastically every 24 hours that the pigweed is emerged.
“With only 75 percent control, you won’t combine that field of soybeans,” Steckel said.
He wasn’t extremely positive about relying on post-emergence herbicide applications for Palmer pigweed or other glyphosate-resistant weeds because timing is so critical and weather will interfere in application almost every year. He is highly doubtful that there is enough application equipment available to do the number of applications exactly when the applications need done.
A warning was to not try and spray more acres per day late into the evening or quite early in the morning, even though it is possible with today’s precision equipment allowing spraying in the dark. Temperature inversions commonly occur in the Midwest and South, which can cause major problems with off-target crop injury.
Steckel is telling farmers across the nation to learn from the Midsouth growers and do a better job in herbicide stewardship. “If you are filling out a scorecard, we are failing when it comes to trying to steward glyphosate.”
Steckel made at least two presentations during the Commodity Classic in Nashville as he was supportive of messages by Bayer CropScience and BASF concerning herbicide-resistant weed control.
- What to do now in regards to the 2014 Farm Bill
- Mistakes that hurt a farm's credit
- Mycogen Seeds introduces four new sunflower hybrids for 2015
- China cuts cotton import quotas to boost demand for its own fiber
- Hog futures the exception to bearish ag market rule Monday AM
- Gangster herbicide program update
- Despite USDA approval, Enlist trait faces hurdles
- Activist investor Peltz pushes DuPont to split itself
- USDA approves Dow’s Enlist corn, soybean traits
- Mapping technology help farmers understand soil
- Improve nutrient balance to boost corn yields
- Study shows differences in understanding sustainable agriculture
- U.S. GMO labeling foes triple spending in first half of this year
- Activists fighting Golden Rice even more in 2014
- Source shows half of GMO research is independent
- East-West Seed signs marketing collaboration with Monsanto
- White House issues veto threat on bill to block WOTUS rule
- USDA releases 2012 cash rents data report