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Best Management Practices for Liberty Herbicide Application (06/16/16)

Liberty herbicide and LibertyLink® soybeans are effective tools to control annual weeds, especially herbicide tolerant weeds.

Best Management Practices for Liberty Herbicide Application

Liberty herbicide and LibertyLink® soybeans are effective tools to control annual weeds, especially herbicide tolerant weeds. Consider the following best management practices to optimize weed control from Liberty herbicide:

•     Heat and humidity. – Spray during daylight hours, preferably the middle portion of the day to take advantage of heat and humidity to maximize weed control. Avoid spray applications when heavy dew is present, or when weeds are under stress from environmental conditions such as drought, cool temperatures, or extended periods of cloudiness.

•     Weed size – Spray actively growing weeds 2 to 4 inches tall to maximize spray coverage and resultant weed control.

•     Adjuvants – Liberty must be applied with ammonium sulfate (AMS) at the rate of 3 lb/A.

•     GPA – The Liberty label indicates application in a minimum of 15 gallons of water per acre. Consider even greater water volume in dense weed/crop canopies to ensure thorough spray coverage.

•     Spray droplet size – Apply Liberty using spray nozzles and spray pressure that generate medium (250 to 350 micron) spray droplets or a droplet spectrum that produce good coverage. Do not use nozzles that produce coarse sprays and insufficient spray coverage or fine sprays that may cause spray drift.

Tom Peters

Extension Sugarbeet Agronomist

NDSU & U of MN

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