XtendiMax, Engenia, And Enlist Duo Now Registered For Use In Florida

By Ethan Carter    

Late last week, after much anticipation, the Florida Department of Agriculture and Consumer Services provided the final approval for use of 2,4-D and dicamba in resistant cotton and soybean cultivars. At time of publication, Florida has approved one 2,4-D product (Enlist Duo from Dow), and two dicamba products (XtendiMax from Monsanto and Engenia from BASF). Fexapan, a third dicamba product from Dupont has not yet been granted approval for use in the state of Florida.

Niether the 2,4-D nor dicamba products are restricted use products, but extreme care should be taken when applying these products as with all pesticides. If using these products, be cognizant of sensitive crops in the area and whether or not neighboring cotton fields are resistant to what you are applying. In Florida, use of all of these new products are governed not only by their product labels, but also the Organo-Auxin Herbicide Rule. Detailed records regarding application information are to be kept for two years, and include but are not limited to, wind speed at time of application, location of treated area, name of treated crop, and name of the product used. The state label and Organo-Auxin Herbicide Rule should be closely inspected before making any chemical applications. If language differs between the two, the application will be designated by whichever is most restrictive. For example, if the product label states a wind speed of 3-15 MPH downwind as acceptable, but the Organo-Auxin Herbicide Rule specifies 3-10 MPH, 10 MPH would be the maximum allowable wind speed. Special attention should be paid to determine buffer areas. The Organo-Auxin Herbidide Rule requires buffer areas that are considerably larger than those required in the federal label of these new herbicide products.

For the most updated and current list of approved nozzles and tank mix partners to be used with Enlist Duo, XtendiMax, and Engenia, routinely visit the XtendiMax™ Herbicide, Engenia Herbicide, and Enlist Duo Herbicide websites. It is important to note that use of any nozzle or tank mix product not specifically approved and listed on these websites would be considered a misuse.

Enlist Duo is a group 4 and 9 herbicide, labeled for weed control and use in Enlist corn, soybeans, and cotton. There are currently no other approved 2,4-D products for use on crops that are 2,4-D-tolerant. The table below, although not an exhaustive list, provides examples of 2,4-D-tolerant cotton varieties.

Table 1. Examples of 2,4-D-tolerant cotton varieties.

W3FE = WideStrike® 3, Genuity® Roundup Ready® Flex, Enlist™

XtendiMax and Engenia are group 4 herbicides, both labeled for weed control and use in dicamba-tolerant cotton and soybeans. It is important that ammonium sulfate never be added to these product formulations, as it will convert them from low to high volatility. There are currently no other approved products for use on crops that are dicamba-tolerant. The tables below, although not exhaustive lists, provide examples of dicamba-tolerant cotton and soybeans varieties.

Table 2. Examples of dicamba-tolerant cotton varieties.

Variety

B2XF = Bollgard II® XtendFlex® cotton

Table 2. Examples of dicamba-tolerant soybean varieties.

Variety

Source:ufl.edu