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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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Cookies pu,icaria Plantwise Knowledge Bank Like most websites we use cookies. 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, 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.

Click on image for larger version Figure 1.

However, in years when flea beetles are abundant and the disease is widely disseminated, some varieties of corn will wilt and the plants may die before tasseling. Go chaetocneam distribution map Contributors own the copyright to and are solely responsible for contributed content.

Biological Control No biological control agents have been reared and released against C.

Luring June and August, when the newly emerged adults appear, the leaves of corn may be partly covered with their feeding scars.

If you need expert professional advice, contact your local extension office. Systemic infection is affected by host reaction ;ulicaria the growth stage at the time of infection. Bugguide is hosted by: Corn flea beetle and bacterial wilt. In Illinois, a threshold of five beetles per yellow sticky trap per day has been proposed Cook, An action threshold used in the north-eastern USA is six adults per maize plants Adams and Los, ; Hoffman et al. Most varieties of commercial field corn are resistant to this diseases.


The damaged plants include sorghumsoybeanssweet cornsmall grains, and some vegetables. Plants not showing these drastic effects may produce normal ears if they get plenty of water. If you need expert professional advice, contact your local extension office. Garden Insects of North America: Dedicated naturalists volunteer their time and resources here to provide this service.

Chaetocnema pulicaria – Corn Flea Beetle

Infrom August to the end of the corn growing season, significantly more C. Dedicated naturalists volunteer their time and resources here to provide this service. They lay eggs for another generation; the second-generation chaetonema appear in early August and feed until late in the fall before entering winter quarters. In other projects Wikimedia Commons.

Life Cycle Female lays egg in ground near host plants. Corn Flea Beetle Chaetocnema pulicaria.

Chaetocnema pulicaria (corn)

Resistant hybrids may not prevent systemic infection or main stalk death when flea beetles feed on the leaf tissue close to the growing point before the V2 or V3 stage Pataky et al. The same study also found that an increase in the rate of insecticide applied, from 0. Chaetocnena – MCZ, Harvard. If the average daily pluicaria during this period is above freezing, flea beetles survive and Stewart’s wilt is likely to be severe on susceptible hybrids. They feed on both the upper and the lower epidermis of corn leaves, but they do not chew completely through the leaves.

The bacterium may move systemically through susceptible plants Braun, but in resistant plants, movement of P. It is able to develop and reproduce on secondary hosts. Like most websites we use cookies. Yields of resistant or moderately resistant hybrids were rarely affected when infection occurred after the V3 stage Suparyono and Pataky, Host-plant resistance to Stewart’s wilt is summarized more completely in the datasheet on P.

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. Please consider pulicarix year-end gift to Puulicaria 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 pulicariw is vectored by C pulicaria.


For further information, we recommend you visit the following resources: 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. Flat list – collapsed Flat list – expanded Threaded list – collapsed Threaded list – expanded Date – newest chaetocnfma 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 chaetoccnema your changes.

Chaetocnema pulicaria – Wikipedia

Views Read Edit View history. By using this site, you agree to the Terms of Use and Privacy Policy. Retrieved 23 February The second summer peak of C pulicaria was observed between the middle into early September, with populations as high as When plants were inoculated weeks after planting, Pataky et al. During the feeding process, the adults disseminate a bacterial wilt of corn called Stewart’s disease. The females lay eggs in soilwhich has plants growing nearby. Not much is known about the larvae, but they probably feed on the roots of grass plants.

Galerucinae Beetles described in Beetles of North America. Click chaetodnema image for larger version Figure 3.