Horseweed (Conyza canadensis):
Often times called: mare’s tail. Warm season erect annual weed. Often found in cultivated areas, pastures, road sides and waste sites. First leaves are in a rosette. Stem with frequent alternate and sessile leaves. Horseweed generally bolts in April/May, flowers in July and sets and disperse seed from August to October. Control of horseweed is more effective when plants are in the rosette stage or less than 2 inches tall.
Horseweed Flower
Young Horseweed
Select Herbicide Options:
Weedmaster
2, 4-D
GrazonNext HL
Duracor
Grazon P+D
Pasturall HL
Surmount
Chaparral (for bermudagrass pastures, will destroy bahiagrass)
REMEMBER: THE LABEL IS THE LAW! Always read the pesticide label before using.
Vanessa Corriher-Olson
Professor, Forage Extension Specialist
Texas A&M AgriLife Extension
Overton, TX
Soil & Crop Sciences Department