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PUNCTUREVINE
Puncturevine is a mat-forming summer annual that reproduces by seeds formed in a spiny fruit. It appears in late May and grows along roadsides, pastures, rangeland, vacant lots, and other places where the soil is dry and sandy. Puncturevine's sharp burs are especially dangerous for livestock. They can pierce and/or cut feet, skin, mouth, and the digestive track. Besides sharp burs, puncturevine contains toxins that cause liver damage in sheep. As with all weeds, the foremost control is preventing it from establishing in an area. To control puncturevine, it is crucial to be consistent with your chosen method(s) of control.
Control
Mechanical: Mechanical means such as hoeing or shallow tillage can curb puncturevine.
Biological: There is a seed weevil and stem weevil known to attack this weed, unfortunately, cold winter temperatures limit success.
Cultural: Puncturevine is not a tough competitor in areas containing well-established desirable vegetation.
Herbicide: A foliar applied herbicide containing 2,4-D or dicamba can be used to control puncturevine at the seedling to flower stage. This department has seen good results in rangeland, pastures, and other non-crop areas by applying chlorsulfuron in the spring. Moisture is need shortly after the application to prompt effective seasonal control.
When choosing any kind of control method, assure that your choice is suited for your particular situation. Always read and follow the entire product label before applying any herbicide. |