Skip to main content

Logo for N.C. Cooperative Extension N.C. Cooperative Extension Homepage

Weed Control in Pastures and Hayfields

en Español / em Português

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.


Inglês é o idioma de controle desta página. Na medida que haja algum conflito entre o texto original em Inglês e a tradução, o Inglês prevalece.

Ao clicar no link de tradução, um serviço gratuito de tradução será ativado para converter a página para o Português. Como em qualquer tradução pela internet, a conversão não é sensivel ao contexto e pode não ocorrer a tradução para o significado orginal. O serviço de Extensão da Carolina do Norte (NC State Extension) não garante a exatidão do texto traduzido. Por favor, observe que algumas funções ou serviços podem não funcionar como esperado após a tradução.


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 ▲


Date:                 June 30, 2020
Agent:               Damon Pollard

This is Damon Pollard, Field Crops Agent with the North Carolina Cooperative Extension Service-Burke Center. Today’s topic is Weed Control in Pastures and Hayfields.

Burke County farms are blessed with a typically productive climate, and illustrated by beautiful scenery. However, we must contend with many persistent annual and perennial weeds. Among those most persistent are horse nettles, spiny amaranth or pigweed, and thistles, both Canada and Musk.

Horse nettles are characterized by spines or thorns that make it undesirable to foraging animals, and also by its familiar yellow berries, that harbor its annoying seeds. A single plant can produce up to 5000 seeds. They reproduce from seeds from dry berries, and rhizomes.

Spiny pigweed is a summer annual that is very similar in appearance to other pigweeds, but has spines along the stems. It is primarily a weed of pastures and hayfields, and occurs less in agronomic crops. Control is best achieved when plants are less than 2 inches tall and becomes more difficult to control as plants increase in size.

Canada thistle is a perennial weed that spreads by seeds and rhizomes that grow 2 to 6 ft. deep, and is very persistent in pastures and hayfields. For superior control, herbicide treatments should be applied when plants are in the prebloom stage of growth. Bull and Musk thistles should be treated when they are in the rosette stage of growth.

Consult the North Carolina Agricultural Chemicals Manual for herbicide treatment recommendations, and application rates, or come by our office for more information.

This is Damon Pollard, Livestock Agent with the North Carolina Cooperative Extension Service-Burke Center.