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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The eggs hatch in 7 to 14 days into larvae. Remarks May damage corn crops; important in parts of the Midwest where it may transmit the bacterial agent of Stewart’s wilt of corn 3.
Stewart’s wilt symptoms begin at the site of the feeding scars.
Temporal distribution of Chaetocnema pulicaria (Coleoptera: Chrysomelidae) populations in Iowa.
Maize seedlings are most susceptible to damage, but moving the planting date may allow them to escape periods when flea beetle populations are high.
Biological Control No biological control agents have been reared and released against C. During caetocnema feeding process, the adults disseminate a bacterial wilt of corn called Stewart’s disease.
Garden Insects of North America: They feed on both the upper and the lower epidermis of corn leaves, but they do not chew completely through the leaves.
Eggs hatch in days. This is to ensure that we give you the best experience possible. A disease forecasting system is used to predict flea beetle survival and subsequently, the risk of Stewart’s wilt for the following crop season Stevens, ; Boewe, ; Eastburn, ; Ries and Pataky, ; Esker, ; Cook, The damaged plants include chaetoocnemasoybeanssweet cornsmall grains, and some vegetables.
Maize plants may become infected by P.
Galerucinae Beetles described in Beetles of North America. Retrieved from ” https: Host plants of leaf beetle species occurring in the United States and Canada Clark et al. If you need expert professional advice, contact your local extension office. There were significantly greater numbers of C. Flat list – collapsed Flat list – expanded Threaded list – collapsed Threaded list – expanded Date – newest first Date – oldest first 10 comments per page 30 comments per page 50 comments per page 70 comments per page 90 comments per page Select your preferred way to display the comments and click ‘Save settings’ to activate your changes.
Yield reduction is significantly higher due to early season systemic infection in susceptible and moderately susceptible hybrids Suparyono and Pataky, ; Freeman and Pataky, 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 species is known for causing damage to crops. When plants were inoculated weeks after planting, Pataky et al.
After mating, the females lay their eggs on plant leaves or in the ground, on or near underground stems and roots. 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 2. We strive to provide accurate information, but we are mostly just amateurs attempting to make sense of a diverse natural world.
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Yield and crop quality may be affected by this disease, depending on the severity of infection Pepper, Modifications to the Stevens-Boewe system of forecasting Stewart’s wilt have been proposed Esker and Nutter, ; Esker et al. Please consider a year-end gift to BugGuide! The bacterium may move systemically through susceptible plants Braun, but in resistant plants, movement of P.
Chaetocnema pulicaria (corn)
Evidence of Stewart’s disease is more common and the results more drastic in sweet corn than in field corn. Threshold Guide Control may be justified when there is an average of 5 or more beetles per plant prior to the 4-leaf stage. Yields of resistant or moderately resistant hybrids were rarely affected when infection occurred after the V3 stage Suparyono and Pataky, Scouting Procedures Examine newly emerged corn for the presence of the beetles and count the approximate number per plant.
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.
Species Chaetocnema pulicaria – Corn Flea Beetle –
While in their larval stage, their small, worm-like bodies are white. Systemic infection is affected by host reaction and the growth stage at the time of infection. Please pulicariia a year-end gift to BugGuide!
The effects of Stewart’s wilt on yield are described in detail in the datasheet on P. In Illinois, the larvae complete growth, pupate, and emerge as adults during June. Pulicariz hortensisalso known as the corn flea beetle  and clover flea beetle is a species of flea beetle from Chrysomelidae family, found in TexasUSA  chaetocnemx Canada.
Views Read Edit View history. We strive to provide accurate information, but we are mostly just amateurs attempting to make sense of a diverse natural world. An action threshold used in the north-eastern USA is six adults per maize plants Adams and Los, ; Hoffman et al.