Feeding by C. pulicaria causes irregular, fine, white scratches on the leaves of maize plants (Poos and Elliott, ). The insect eats through the epidermis of the. Genus Chaetocnema. Species pulicaria (Corn Flea Beetle). Synonyms and other taxonomic changes. Chaetocnema pulicaria F.E. Melsheimer. Description The adult is a very small, smooth, shiny, roundish, black beetle. The hind legs are distinctly enlarged and thickened, and the beetles jump readily.

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Scouting Procedures Examine newly emerged corn for the presence of the beetles and count the approximate number per plant.

This is to ensure that we give you the best experience possible. Control The Winter Temperature Index is useful in indicating the probability of wilt infection for the coming season. Chaetocnema hortensisalso known as the corn flea beetle [1] and clover flea beetle[2] is a species of flea beetle from Chrysomelidae family, found in TexasUSA [3] and Canada.

The result is often small ears or no ears at all.

Temporal distribution of Chaetocnema pulicaria (Coleoptera: Chrysomelidae) populations in Iowa.

Only the prothorax and the chaetocnemq abdominal segment are slightly darkened. Infrom August to the end of the corn growing season, significantly more C. EU pesticides database www. When adults are abundant early in the spring, they will feed heavily on the primary leaves and first three or four true leaves, often causing the seedling to appear whitish or silvery and sometimes killing the plant.

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Host-Plant Resistance Plants are not resistant to the flea beetle or pulicxria feeding. Plants not showing these drastic effects may produce normal ears if they get plenty of water. It is able to develop and reproduce on secondary hosts.

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In most regions of the USA, maize planted earliest in the spring is most severely damaged by flea beetles and Stewart’s wilt. Bugguide is hosted by: Not much is known about puliacria larvae, but they probably feed on the roots of grass plants.


Slight infection may occur when the sum totalsand no infection will occur below Continuing to use www. In Illinois, a threshold of five beetles per yellow sticky trap per day has been proposed Cook, Systemic infection is affected by host reaction and the ppulicaria stage at the time of infection.

Chaetocnema pulicaria (corn) – Bugwoodwiki

Synonyms and other taxonomic changes. Because the corn-flea beetle is verv sensitive to temperatures, a criterion pulicafia predict the extent of overwintering heetles has been developed called the Winter Temperature Index.

Yield reduction is significantly higher due to early season systemic infection in susceptible and moderately susceptible hybrids Suparyono and Pataky, ; Freeman and Pataky, The eggs hatch in 7 to 14 days into larvae. In Illinois, the larvae complete growth, pupate, and emerge as adults during June. Click on image for larger version Figure 1. Life Cycle Female lays egg in ground near host plants.

Corn Flea Beetle Chaetocnema pulicaria. The effects of Stewart’s wilt on yield are described in detail in the datasheet on P. Generally, field corn infested with Stewart’s disease will show little sign of disease until late in the summer when numerous leaf lesions will appear on the leaves.

By using this site, you agree to the Terms of Use and Privacy Policy. In other projects Wikimedia Commons. Host-plant resistance to Stewart’s wilt is summarized more completely in the datasheet on P. Upcoming Events Discussioninsects and people from the BugGuide Gathering in VirginiaJuly Photos of insects and people from the gathering in WisconsinJuly Photos of insects and people from the gathering in VirginiaJune Close Find out more.

The species is black in color, with orange legs and antennae. If the infestation is so severe that some plants are being killed, or if more than half of the leaves are whitish, it may be profitable to treat. Cookies on Plantwise Knowledge Bank Like most websites we use cookies.


An action threshold used in the north-eastern USA is six adults per maize plants Adams and Los, ; Hoffman et al. Yield and crop quality may be affected by this disease, depending on the severity of infection Pepper, Dedicated naturalists volunteer their time and resources here to provide this service.

This index is based on the suin of the average monthly temperatures for December, January, and February. After mating, the females lay their eggs on plant leaves or in the ground, on or near underground stems and roots. Photos of insects and people from the gathering in ArizonaJuly Photos of insects and people from the gathering in Alabama Photos of insects and people from the gathering in Iowa Photos from the Workshop in Grinnell, Iowa Photos from the gathering in Washington.

IPM : Field Crops : Corn Flea Beetle (Chaetocnema pulicaria)

However, the exact growth stage at which resistance begins to restrict movement sufficiently to control Stewart’s wilt is not known. Host plants of leaf beetle species occurring in the United States and Canada Clark et al. Please consider pulicxria year-end gift to BugGuide! The bacteria that cause Stewart’s disease, or bacterial wilt of corn, overwinter in the body of the adult corn-flea beetle.

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The females lay eggs in soilwhich has plants growing nearby. The hind legs are distinctly enlarged and thickened, and the beetles jump readily when approached. The damaged plants include sorghumsoybeanssweet cornsmall grains, and some vegetables. Periods that ranged from 14 to 32 d were observed in and when C.