![]() In processing tomatoes, begin sampling when fruit has reached 1 inch or more in diameter. The life cycle takes about a month in warm weather, and there are three to five generations a year. The adult moth is mottled gray and brown with a wingspan of about 1 inch. The pupa is similar to that of the tomato fruitworm it pupates in a depression made on or pocket just below the soil surface. The color varies, however, and the spot is absent in a proportion of some populations. Larvae usually are dull green with many fine, wavy, light-colored stripes down the back and a broader stripe along each side they usually have a dark spot on the side of the thorax above the second true leg. Newly hatched larvae feed together on foliage near the egg cluster and gradually disperse as they grow. In some areas beet armyworm may be the most important caterpillar attacking tomato.Įggs are laid on leaves in clusters covered with hairlike scales left by the female moth there may be more than 100 eggs per cluster, but usually there are fewer. In the southern part of Europe, 2-3 generations develop during the growing season, in Central Asia – up to 6-7, in subtropical and tropical climates – up to 10 generations per year.Beet armyworms are a widespread pest in California found in tomato fields every year. Pupal development lasts from 7 to 28 days.įeatures of development. The caterpillars pupate in the soil at a depth of 3-5 cm. Young caterpillars concentrate on weeds, older ones switch to cultivated plants. The development of caterpillars lasts 14-28 days. First they skeletonize the leaves, later they make holes in them. After hatching, the caterpillars immediately start feeding. The duration of development depends on the ambient temperature. Place the females in a pile on the underside of the leaves.Įgg. ![]() Eggs are laid in three or four piles, up to 250 pieces each. ![]() First - generation butterflies are the most prolific. Fecundity varies from 300 to 1700 eggs, sometimes more than 2000. Females start laying eggs 1-3 days after the flight. Butterfly flight is observed from May to the end of October. ![]() ![]() It feeds on cotton, alfalfa, sugar beet, corn, tobacco, peanuts, sesame, soy, tomatoes, potatoes, peas, turnips, eggplants, watermelons, clover, sainfoin, young citrus, apple, quince, grapes, oak plantings, elms, yellow acacia, chrysanthemums, tea. The list of forage plants includes 185 species from 50 families. ![]()
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