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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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Click the contributor’s name puoicaria licensing and usage information. The larvae are small, white, and not very active. When the index suggests successful overwintering of beetles, damage can be reduced by avoiding early planting and by planting resistant varieties of field or sweet corn.

Corn Flea Beetle Chaetocnema pulicaria. Modifications to the Stevens-Boewe system of forecasting Stewart’s wilt have been proposed Esker and Nutter, ; Esker et al.

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. At later growth stages, Stewart’s wilt ratings were lower and resistance was chaetocnemaa to be more effective because infection sites were farther from the growing point and movement of the bacterium was limited.

While in their larval stage, their small, worm-like bodies are white. Yield and crop quality may be affected by this disease, depending on the severity of infection Pepper, The hind legs are distinctly enlarged and thickened, and the beetles jump readily when approached.

Chaetocnema pulicaria (corn) – Bugwoodwiki

They also transmit Stewart’s wilt ; by removing the leaf tissue from the plant, they open a wound which allows the disease to begin spreading from plant to plant. Go to distribution map A disease forecasting system is used to predict flea beetle survival and subsequently, the risk of Stewart’s chaetodnema for the following crop season Stevens, ; Boewe, ; Eastburn, ; Ries and Pataky, ; Esker, ; Cook, This page was last edited on 22 Marchat The disease organism is Pantoea stewartii.


Host plants of leaf beetle species occurring in the United States and Canada Clark et al. Lower densities that cause minimal direct injury to plants are also of concern because C. Contributed by v belov on 19 November, – Dedicated naturalists volunteer their time and resources here to provide this service. Retrieved 23 February Disease Forecasting Winter survival of C. Contributed by Mike Quinn on 19 November, – Contributors own the copyright to and are chaeotcnema responsible for contributed content.

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 The insect eats through the epidermis of the maize leaf, leaving a transparent line parallel to the leaf veins; this injury is often referred to as a ‘windowpane’ effect.

Click on image for larger version Figure 1. However, some maize hybrids are resistant to Stewart’s wilt Pantoea stewartii. Infrom August to the end of the corn growing season, significantly more C.

When plants were inoculated weeks after planting, Pataky et al. They lay eggs for another generation; the second-generation adults appear in early August and feed until late in the fall before entering winter quarters. Drought can aggravate or accentuate the diseased condition of a plant.

An action threshold used in the north-eastern USA is six adults per maize plants Adams and Los, ; Hoffman et al. During the feeding process, the adults disseminate a bacterial wilt of corn called Stewart’s disease. Stewart’s wilt symptoms begin at the site of the feeding scars.

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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. Chemical Control Due to the variable regulations around de- registration of pesticides, we are for the moment not including any specific chemical control recommendations.

Maize plants may become infected by P. Coleopterists Society, Special Publication no.

Species Chaetocnema pulicaria – Corn Flea Beetle –

The females lay eggs in soilwhich has plants growing nearby. Corn Flea Beetle Damage. In other projects Wikimedia Commons.

Garden Insects of North America: Corn Flea Beetle Chaetocnema pulicaria Description The adult is a very small, smooth, shiny, roundish, black beetle. The eggs hatch in 7 to 14 days into larvae. The larvae feed especially on plants’ rootscausing serious damage. Close Find out more. Yield reduction is significantly higher due to early season systemic infection in susceptible and moderately susceptible hybrids Suparyono and Pataky, ; Freeman and Pataky, Host-plant resistance to Stewart’s wilt is summarized more completely in the datasheet on P.

Chaetocnema pulicaria (corn)

Type – MCZ, Harvard. There were significantly greater numbers of C. 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. Scouting Procedures Examine newly emerged corn for the presence of the beetles and count the approximate number per plant.

Based on this new quantitative information, planting time could be altered to avoid the emergence of the overwintering generation of C. Greater survival is expected after a mild winter than after a winter with colder temperatures and, consequently, the potential for Stewart’s wilt is also higher.