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Department of Agronomy

Kansas State University

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2004 Throckmorton PSC

Manhatan, KS 66506

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Extension Agronomy

EPA approves labels for over-the-top dicamba application

This article was updated at 8:00 pm on October 30, 2020 and reflects updated information in Table 1.

Labels for XtendiMax, Engenia, and Tavium were granted unconditional Section 3 labels on October 27, 2020. The labels will be effective until 2025. Some details are still being confirmed, but information in Table 1 below has been confirmed by labels and/or company representatives. The registration notice and labels can be accessed by clicking the name of each product in the table.


Table 1. Summary of labels for over-the-top dicamba applications. Table created by Sarah Lancaster, K-State Research and Extension.

 

XtendiMax

Engenia

Tavium

Application cutoff

Through June 30 or R1 soybean

Through July 30 in cotton

Through June 30 in soybean

Through July 30 in cotton

Through June 30 or V4 soybean

Through July 30 or 6-leaf cotton

Drift reduction adjuvant

Required

Not required/depends on tankmix

Required

Volatility reduction agent

Required

Required

Required

Downwind buffer

240 ft (110 ft with approved hooded sprayer)

240 ft (110 ft with approved hooded sprayer)

240 ft  (110 ft with approved hooded sprayer)

Forecast

48 hours no runoff producing event

48 hours no runoff producing event

48 hours no runoff producing event

Training

Updated every other year

Updated every year

Updated every other year

As before, each company will maintain a website that lists approved hooded/shielded sprayers, spray nozzles, and tank-mix partners. Those websites are:

                XtendiMax: www.xtendimaxapplicationrequirements.com

                Engenia: www.engeniatankmix.com

                Tavium: www.taviumtankmix.com

 

The EPA also issued a clarification limiting the use of Special Local Needs (Section 24(c)) labels to add additional state-specific restrictions. At this time, it is unclear if the Kansas Department of Agriculture will seek any modifications to the federal label.

In a recent survey, 56% of producers indicated they will plant dicamba-resistant soybeans in 2021, down from 78% who reported planting dicamba-resistant soybeans in 2020. A potential increase in non-dicamba-tolerant soybeans for 2021 highlights the need for extra care when making in-crop dicamba applications.

 

 

Sarah Lancaster, Extension Weed Science Specialist
slancaster@ksu.edu