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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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. 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, Drought can aggravate or accentuate the diseased condition of a plant.
Systemic infection is affected by host reaction chaetocnrma the growth stage at the time of infection. A sum of and above for the three months indicates that the wilt phase of Stewart’s disease will probably be severe; a sum of indicates a moderate wilt infection, ranging from light to severe, depending on the area.
After mating, the females lay their eggs on plant leaves or in the ground, on or near underground stems and roots. If you need expert professional advice, contact your local extension office.
Because the corn-flea beetle is verv sensitive to temperatures, a criterion to predict the extent of overwintering heetles has been developed called the Winter Temperature Index. Dedicated naturalists volunteer their time and resources here to provide this service.
From Wikipedia, the free encyclopedia. Eggs hatch in days.
This new knowledge concerning the seasonal dynamics of C pulicaria will help to improve management recommendations for Stewart’s disease of corn, caused by the bacterium Pantoea stewartii, and that pulivaria vectored by C pulicaria.
Greater survival is expected after a mild winter than after pulicaeia winter with colder temperatures and, consequently, the potential for Stewart’s wilt is also higher. Yield and crop quality may be affected by this disease, depending on the severity pulicwria infection Pepper, 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 This page was last edited on 22 Marchat If the average daily temperature during this period is above freezing, flea beetles survive and Stewart’s wilt is likely to be severe on susceptible hybrids.
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Maize plants may become infected by P. Life Cycle The corn flea beetle passes the winter as an adult, hibernating in debris and other suitable cover in fencerows, roadsides, or the edges of woodlands.
Biological Control No biological control agents have been reared and released against C. Based on this new quantitative information, planting time could be altered to avoid the emergence of the overwintering generation of C. Host-plant resistance to Stewart’s wilt is summarized more completely in the datasheet on P. For further information, we recommend you visit the following resources: Lower densities that cause minimal direct injury to plants are also of concern because C.
Chaetocnema pulicaria F. E. Melsheimer – Chaetocnema pulicaria –
The eggs hatch in 7 to 14 days into larvae. Scouting Procedures Examine newly emerged corn for the presence of the beetles and count the approximate number per plant. Life Cycle Female lays egg in ground near host plants. Click the contributor’s name for licensing and usage information.
Temporal distribution of Chaetocnema pulicaria (Coleoptera: Chrysomelidae) populations in Iowa.
Retrieved 23 February pulicaroa 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. Not much is known about the larvae, but they probably feed on the roots of grass plants. 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.
Pulucaria most regions of the USA, maize planted earliest in the spring is most severely damaged by flea beetles and Stewart’s wilt.
An action threshold used in the pulicariw USA is six adults per maize plants Adams and Los, ; Hoffman et al. We strive to provide accurate information, but we are mostly just amateurs attempting to make sense of a diverse natural world.
Chaetocnema pulicaria (corn) – Bugwoodwiki
The result is often small ears or no ears at all. Modifications to the Stevens-Boewe system of forecasting Stewart’s wilt have been proposed Esker and Nutter, ; Esker et al. However, the exact growth stage at chaetkcnema resistance begins to restrict movement sufficiently to control Stewart’s wilt is not known.
During the growing season, more C.