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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However, the exact growth stage at which resistance begins to restrict movement sufficiently to control Stewart’s wilt is not known.
Chaetocnema pulicaria – Wikipedia
Host plants of leaf beetle species occurring in the United States and Canada Clark et chzetocnema. Photos of insects and people from the gathering in ArizonaJuly Photos of insects and people from the gathering in Alabama Cbaetocnema of insects and people from the gathering in Iowa Photos from the Workshop in Grinnell, Iowa Photos from the gathering in Washington.
The females lay eggs in soilwhich has plants growing nearby. Agrostis gigantea black bent. Garden Insects of North America: If you would like to, you can learn more about the cookies we use.
This index is based on the suin of the average monthly temperatures for December, January, and February. Galerucinae Beetles described in Beetles of North America. Articles with ‘species’ microformats. Plants not showing these drastic effects may produce normal ears if they get plenty of water.
IPM : Field Crops : Corn Flea Beetle (Chaetocnema pulicaria)
Click on image for larger version Figure 1. The damaged plants include sorghumsoybeanssweet cornsmall grains, and some vegetables.
Eggs hatch in days. In other projects Wikimedia Commons. Click on image for larger version Figure 2.
Chaetocnema pulicaria (corn)
However, some maize hybrids are resistant to Stewart’s wilt Pantoea stewartii. The result is often small ears or no ears at all. Periods that ranged from 14 to 32 d were observed in and when C. Only the prothorax and the last abdominal segment are slightly darkened. When conditions are favorable for both the beetles and the wilt, nearly percent of the susceptible varieties of field corn will show symptoms of Stewart’s disease by late fall.
Generally, field corn infested pulicariq Stewart’s disease will show little sign of disease until late in the summer when numerous leaf lesions will appear on the leaves.
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The first summer peak of C pulicaria was observed between the end of June into the middle of July, with the highest observed peak at Control The Winter Temperature Index is useful in indicating the probability of wilt infection for the coming season. Corn Flea Beetle Chaetocnema pulicaria Description The adult is a very small, smooth, shiny, roundish, black beetle. Most varieties of commercial field corn are resistant to this diseases.
Life Cycle Female lays egg in ground near host plants. 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. Corn Flea Beetle Damage. At later growth stages, Stewart’s wilt ratings were lower and resistance was thought to be more effective because infection sites were farther from the growing point and movement of the bacterium was limited.