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South Dakota Ag News Headlines
New Labeling on Soybean Dicamba Products
South Dakota Ag Connection - 01/03/2018

The South Dakota Department of Agriculture has labeled Engenia, Fexapan and Xtendimax for postemergence use on Xtend "dicamba tolerant" soybeans for the 2018 growing season.

"There are several changes to the label over last year. There also have been some changes made to clarify application directions," explained Paul O. Johnson, SDSU Extension Weed Science Coordinator.

Below, Johnson highlights some of the directions South Dakota growers should be aware of:

- Must record time of cleanout of sprayer and method used before starting to spray.

- Do not spray if there is a sensitive crop adjacent or neighboring down wind.

- Must always leave 110-foot buffer unless an approved site is down wind.

- Do not spray if a temperature inversion is present.

- Spray only with a wind between 3-10 mph at boom height.

- Spray only between sunrise and sunset.

- Spray only with approved nozzles and in proper pressure range for nozzle being used.

- Spray only with approved tank mixes and spray additives that are on the label.

- Do not spray any additives or mixes containing ammonium type products "AMS".

- Spray at no more than 24-inches above crop canopy.

- Spray at under 15 miles per hour sprayer speed.

- Must use a minimum of 10 gallons of water with Engenia or 15 gallons of water with Fexapan or Xtendimax per acre.

- Must use agitation at all times during spray operation.

- Must apply before the end of R1 growth stage or when soybeans begin to bloom.

- Do not spray if rain is expected within 24 hours, rainfast to weeds in 4 hours.

- Applicators must be trained on dicamba-specific use and have documentation of training and testing.

- Applicators must keep daily records as listed on label of use and maintain for two years.

- Applicators must record time of cleanout of sprayer and method used when finished spraying.

- Applicators should spray on small weeds, 4-inches or less.

- The applicator is responsible for all drift whether physical or vapor.

- Applicators must spray full rate of product at all times.

- Applicators must have a minimum of seven days between post applications.

- Applicators may only apply two post emergence applications.

- Only ground applications are approved.

"If an applicator feels that these requirements can't be met with their sprayer then hiring the spraying done or changing the herbicide program should be considered," Johnson said.

He explained that the dicamba program is not for every situation on every farm and rotation of herbicide programs should always be considered to avoid having problems with resistant weeds in the future. Dicamba products have been a good tool for weed control in corn for over 50 years and can be a valuable option to have in the tool box for soybeans if handled properly.

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