Weed scientists says temperature inversions responsible for large acreage dicamba damage

In Delta Farm Press

by Ford Baldwin, weed scientist consultant

Continuing with excerpts from my testimony before the Arkansas Joint Agriculture, Forestry and Economic Development Committee meeting on dicamba, I will focus on what is required to get a large acreage or a landscape effect from a herbicide.

This effect occurred in the high use areas in west Tennessee, northeast Arkansas, the Mississippi Delta, and the Missouri Bootheel. It is much different than what is happening in areas or states where less dicamba is being applied. In these high use areas, about two to three weeks after the drift and volatility patterns that I described appeared, the bomb went off — both in 2016 and to a much greater extent in 2017. Continue reading

Missouri uses weather stations to help farmers avoid off-target applications

by Linda Geist

Nine Missouri weather stations recently received updates to help farmers and chemical applicators know when to spray herbicides to avoid off-target movement caused by temperature inversions.

The University of Missouri Extension Commercial Agriculture Program operates 24 real-time weather stations throughout the state. The Missouri Soybean Merchandising Council recently funded updates for stations in Monroe City, Vandalia, Albany, Columbia, Green Ridge, Hayward, Lamar, Linneus and Mountain Grove. Continue reading

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