Skip to main content

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

Cattle Lice

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 ▲

RADIO TRANSCRIPT
March 3, 2023
Damon Pollard

This is Damon Pollard, Livestock agent with the North Carolina Cooperative Extension Service-Burke center. Today’s topic is Cattle Lice.

External parasites of beef cattle are many. One often neglected, is lice. Both chewing and bloodsucking lice are more abundant during winter. They may be present during summer and fall, but large infestations occur rapidly in winter and spring.

Watch for signs of scratching and rubbing against solid objects. Chewing lice feed on hair, scabs, and excretions of cattle. Infestations weaken the animal, interrupt normal feeding patterns, and make them more susceptible to disease. Sucking lice feed on blood by piercing the hide with their sharp mouths. This loss of blood can stunt growth, and reduce weight gains. Sucking lice are usually found on the head, neck, and withers, around the tail head, and on inner surface of legs. They are prevalent in Burke County.

To control cattle lice, use approved pesticides applied through sprays, backrubbers, dust bags, pour-ons, and injectables. Read the labels carefully, and follow directions and withdrawal times. Never apply famphur (Warbex) or fenthion (Lysoff, Tiguvon) as pour ons during October, November, or December, unless earlier applications were made of these for grubs. Never apply ivermectin; either as pour-on, or injectable, during October, November, or December, as grub related reactions can occur. Cattle treated with ivermectin in August, and September can be retreated during winter for internal parasites, mange mites, and lice, without danger of grub related reactions.

This is Damon Pollard, Livestock agent with the North Carolina Cooperative Extension Service-Burke Center. If you would like more information, call us at 764-9480.