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Scientific name Amsacta lactinea (Cramar) Lepidoptera, Lamperiaceae. Alias ​​red sleeve moth. Widely distributed throughout the country. At the beginning of the 1970s, Hebei, Shandong, and Shanxi had great occurrences and were seriously damaged.
The host is mainly responsible for corn, cotton, soybeans, etc. It also harms more than 100 species of plants such as millet, sorghum, potato, sweet potato, sunflower, kenaf, onion, melons, mulberry, orange, and green manure.
The characteristics of larvae gnaw on corn silk, serious filaments were bitten or eaten ear top tender grains, affecting yield. When harming cotton, the corolla and cotton bolls were bitten. Severe cotton leaves were eaten, and the seedling stage suffered heavy damage resulting in lack of seedlings and ridges.
Morphological characteristics Adult body length 18-20mm, 46-64mm wingspan. Body, wing white, front wing and neck plate end level red, abdomen in addition to the back of the abdomen and anal hair clusters outside the orange, and there is a black band, the side of the Mask black vertical band, sub-lateral side of a black spot, ventral white. The antennae are black. The upper corners of the fore wings usually have black spots; the whitish veins often have black crescent patterns, and the sub-ends are black, 1-4 or none. The larvae are about 40mm long with brown heads, dark brown or black at the ankles, densely covered with reddish-brown or black long-haired hair, black chest-footed feet, red gastropods, and one red dot on the side of the body. Topline, Asian backline, and valve The lower line consists of l black dots; the valve is red. Young larvae are grayish yellow in color. Egg hemispherical, diameter 0.79mm; egg shell surface radial from the top to the peripheral vertical lines; early production of yellow-white, shiny, after the gradual grayish yellow to dark gray; long 22-26mm, chest width 9-10mm, Dark brown, shiny, with 10 thorns.
Living habits occur in the eastern part of China and south of Liaoning Province. Hebei has one generation a year, Nantong has two generations a year, and Nanjing has three generations. Feathers begin to emerge from May to June of the following year. Adults live in ecstasy and have phototaxis. Eggs are produced in the back of the leaves and can reach hundreds of grains. The larvae became infested after hatching and dispersed after 3rd age. The larvae act quickly. After being matured, it is put into shallow soil or covered in defoliants. The egg period is 6-8 days, the larval period is 27-28 days, and the adult life is 5-7 days.
Prevention and control methods (1) In north China from late July to early August, the occurrence of insect pests in heavy areas and plots was monitored. When it was found that every 500 eggs in the corn field had 2 eggs or the spike rate was higher than 15%, they should be controlled. . (2) Before the larvae spread harm, spray 90% crystals of dichlorfon 1000-2000 times or 50% malathion EC 800 times to the corn fields and bean fields near the trees and ditches. (3) Prevention and control When the fruit is on the head of the moth, use the original powder of 10 million gram of bacteria per gram to shake off or sprinkle water on the ear, and treat cotton bollworm, corn borer and armyworm on the ear. (4) After the larvae are spread, the larger body can be captured manually, and it is also effective to capture it continuously for 2-3 times. (5) During the period from April to May, when the population of the red rim was severely affected, people were mobilized to the sides of the road, the trenches, etc., to plant under willows or afforestation pits under the willow tree or near the ditch to reduce the overwintering base.
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