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Stark-Billings County |
Extension Spotlites
September 24, 2009
Fall Herbicide Applications
Fall is the best time to control winter annual weeds such as shepherds purse and horseweed (marestail), biennial weeds such as bull and musk thistle, and simple perennial weeds such as dandelion and curly dock. Control is usually maximized if effective herbicides are applied after a light frost and before the soil is frozen. As long as plants appear to be alive with green and normal textured leaves, herbicides should effectively control weeds. Dandelions are usually more effectively controlled in the fall during less than ideal spraying conditions than waiting until spring. Apply herbicides when the daytime temperatures are as warm as possible and morning lows are above 32 degrees. Winter annual, biennial, and simple perennial weeds can be more effectively controlled at lower temperatures than summer annual weeds such as lambsquarters.
For more information contact:
Kurt Froelich,
Extension Agent
NDSU Extension Service
Stark-Billings County
1340 W. Villard St.
Dickinson ND 58601-4646
(701) 456-7665