A state Section 24(c) Special Local Need Label has been approved by the U.S. EPA and Georgia Department of Agriculture (GDA) allowing directed and hooded applications for Engenia, FeXapan, and XtendiMax.
Topical applications of Engenia, FeXapan, and XtendiMax in tolerant cotton can only be made through 60 days after planting; thus, directed labels will offer an extended use of this herbicide chemistry. Directed applications should provide improved weed control through better coverage and, even more importantly, will offer a more effective resistance management approach when managing Palmer amaranth as tank mixtures with more effective herbicides such as diuron may be used. One must have the label in hand and follow it precisely. Below are a few details form the label.
1. Applicators must have attended (and registered) a 2019 Using Pesticide Wisely training and must be a certified applicator.
2. Each applicator must have the label of the product they decide to use in hand during the application. Labels can be obtained at the GDA web site. Once on the website, click “go to dicamba page”; then select the “24C label” for the product of choice. These labels will provide detailed information needed to make a proper application.
3. Hooded applications: May use any standard spray tip as long as droplets are coarse or larger in size (>341 microns vmd). Hoods must remain in contact with soil while making the application. A maximum of 6 mph sprayer speed. Tolerant cotton must be at least 15 inches in height at time of application.
4. Directed Layby applications: May use any standard spray tip as long as droplets are coarse or larger in size (>341 microns vmd). Spray release point must not be more than 10 inches from the soil and the cotton must be at least 20 inches in height. Spray tip must be angled downward toward the soil making sure no spray droplets remain in the air. A maximum of 6 mph sprayer speed is required.
A few questions and answers:
- Do hood or layby applications reduce the buffer requirements currently required for topical applications? NO!
- Do hood or layby applications increase the application window for these dicamba formulations? Yes. Hooded or directed applications can be made in-crop up until 7 days pre-harvest for cotton.