Winter Weed Control

— Written By
en Español

El inglés es el idioma de control de esta página. En la medida en que haya algún conflicto entre la traducción al inglés y la traducción, el inglés prevalece.

Al hacer clic en el enlace de traducción se activa un servicio de traducción gratuito para convertir la página al español. Al igual que con cualquier traducción por Internet, la conversión no es sensible al contexto y puede que no traduzca el texto en su significado original. NC State Extension no garantiza la exactitud del texto traducido. Por favor, tenga en cuenta que algunas aplicaciones y/o servicios pueden no funcionar como se espera cuando se traducen.

English is the controlling language of this page. To the extent there is any conflict between the English text and the translation, English controls.

Clicking on the translation link activates a free translation service to convert the page to Spanish. As with any Internet translation, the conversion is not context-sensitive and may not translate the text to its original meaning. NC State Extension does not guarantee the accuracy of the translated text. Please note that some applications and/or services may not function as expected when translated.

Collapse ▲

You may think it’s a bit too late to control those pesky winter weeds, but don’t worry. Although right now it feels like spring will never get here, when it finally does, those weeds will turn green and grow quickly. While Oct-Dec is usually the “best” time to spray herbicides to control winter weeds, applying during the spring growth spurt, in February-April, can provide control as well.

The most important thing when considering weed control is to determine what exactly you are controlling. Do you have a major invasion of broadleaf weeds or grassy weeds? Do you have a mainly Bermudagrass pasture or a fescue one? Weeds in general prevent a pure stand, which can interfere with hay drying times and while grass weeds aren’t commonly a health concern, it’s just one more thing you have to consider (particularly johnsongrass).

Common winter weeds in our area include: buttercup, curly dock, henbit, chickweed, wild mustard, wild radish, and Italian ryegrass. The Agricultural Chemicals Manual is a useful tool in selecting the best herbicide; ALWAYS read the label and follow application instructions. For example, in dormant Bermuda (not actively growing), glyphosate and paraquat should not be applied except during extended periods of mild temps (60 F or more). Several of the most common herbicides also have grazing and haying restrictions.

Broadleaf winter weeds, some of which are mentioned above, can be numerous, noxious, and possibly toxic to animals that consume them. They can also be prickly, which means your livestock are not exactly an effective method of control.

If you have overseeded your pasture, the available herbicide options diminish greatly. Nothing is labeled for a cover crop planted into a grass weed problem (such as Italian ryegrass). For the broadleaf weeds (such as henbit) there are several options for control in rye, barley, oats, triticale, etc.

The most important things to remember when controlling winter weeds (or summer weeds for that matter) is to 1) identify what you have, or at least a general idea—broadleaf vs grass so that you can select the appropriate herbicide and 2) READ THE LABEL and follow application instructions and grazing/haying restrictions.

If you need access to the 2015 Agricultural Chemicals Manual or assistance in selecting a possible herbicide, feel free to call the office at (919) 731-1525. Just remember, I am no herbicide expert…but I will do my best!!