Skip to main content

NC State Extension

Insects – Tobacco Flea Beetle

en Español / em Português
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.


Português

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

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 ▲

Tobacco flea beetles (Epitrix hiritipennis) are the most common species of flea beetles found in North Carolina tobacco. Other species of flea beetles may also feed on tobacco, but all species have similar biology and are managed in the same way.

Adult flea beetles congregating on base of a tobacco leaf. Photo: H.J. Burrack

Adult flea beetles congregating on base of a tobacco leaf. Photo: H.J. Burrack

Tobacco flea beetles complete 3 to 4 generations per year in the southeast, depending on weather, and the generation time is roughly 30 days. Adult flea beetles overwinter in plant matter surrounding fields and migrate into crop plantings in the spring. Tobacco flea beetle eggs are extremely small and are laid in soil cracks around the base of host plants. Larvae feed on the roots of tobacco and other solenaceous plants. The effect of larval feeding on tobacco plants is unclear. Adult tobacco flea beetles feed on foliage, resulting in small, shot holes on leaf surfaces. This defoliation can stunt young plants. Grower concern about late season flea beetle damage has been rising, particularly because of potential impacts on leaf quality. As farm size has increased, tobacco is held in the field for a longer time and exposed to flea beetle feeding for a longer period. The relationship between beetle injury and cured leaf weight and quality is unclear but is being studied.

Numerous, tiny, "buckshot-like" holes are late season flea beetle damage. Photo: H.J. Burrack

Numerous, tiny, “buckshot-like” holes are late season flea beetle damage. Photo: H.J. Burrack

Thresholds and Management

Treatment is justified in the early summer when small plants average 4 or more beetles per plant. However, virtually all conventionally grown tobacco in North Carolina is treated with a systemic neonicotiniod insecticide in the greenhouse, or less often, at transplant. These materials provide long term control of flea beetles, typically through topping. Systemic treatments are attractive because of their ease and efficacy, but they also are not always needed. Flea beetles are not economically significant in every field every year, and systemic treatments may results in more insecticide being used than necessary.

Treatment for large plants is recommended when there are 60 or more beetles per plant or when the lower leaves begin to look ragged or lacy at the base (near the stalk). The threshold for large plants is not firm, as fields with fewer than 60 beetles per plant have been observed to have significant feeding injury. Late season flea beetles can be difficult to control because they are localized on the lower parts of the plant. Therefore, lower stalk coverage is essential. Limited bioassays conducted in 2010 suggest that materials registered for foliar application in tobacco against flea beetles are efficacious. See the North Carolina Agricultural Chemicals Manual for registered materials and use recommendations.

Biological Control

There are no commercially available biological control agents for use against tobacco flea beetles. Observations in 2010 suggest that organic fields may have less late season flea beetle injury than conventional fields.