The scientific name is 10xostege sticticalis Linnaeus, Lepidoptera. Alias ​​yellow green 螟, beet net 螟 网, net cone amount 螟. Distribution in Jilin, Inner Mongolia, Heilongjiang, Ningxia, Gansu, Qinghai, Hebei, Shanxi, Shaanxi, Jiangsu and other provinces.
Host beets, soybeans, sunflowers, flax, sorghum, peas, lentils, melons, cabbage, potatoes, fennel, carrots, onions, onions, corn, etc.
Injury characteristics The newly hatched larvae feed on the leaves and the residual epidermis. After growing up, the leaves can be eaten as nicks or leaves only, making the leaves mesh. When it happens, it also harms flowers and young people. Grasshoppers are an intermittent outbreak of pests. The third cycle of the disease has already arrived. It has now entered a period of major development. After serious occurrences in some areas in 1996, it re-emerged in 1997. The area and scope of the first generation have been further expanded, and some regions have suffered more. According to monitoring by the National Agricultural Technology Center and provincial stations and related regional stations, the current generation of adults has entered a period of high growth in Inner Mongolia, Shanxi, and Hebei, and second-generation larvae are bound to occur in some places.
Morphological characteristics Adult body length 8-12mm, wingspan 24-26mm; body, gray-winged brown, dark brown spots on the forewings, yellowish stripes on the outer edge of the wings, a large rectangular yellow-white spot in the middle room; hind wing gray The proximal base of the wing is relatively light, with two black parallel corrugations along the outer edge. Egg oval, 0.51 (mm), milky, shiny, disperse or 2 to 12 eggs imbricate. The mature larvae have a body length of 19-21mm, and the head is black with white spots. The chest and abdomen are yellow-green or dark green. There are distinct longitudinal stripes and the whole body has hairy tumors. It is 14mm long and pale yellow. The bandits are 40mm long and 3-4mm wide. Living habits are distributed in the northern regions of China, and occur 2-4 generations a year. The old mature larvae spit in the soil for wintering. May spring phlegm and feathering. Adults fly weak, like to eat nectar, eggs scattered on the back of the main vein on both sides of the leaves, often 3-4 tablets together, to the ground from the ground 2-8cm of stems and leaves most. The newly hatched larvae mostly concentrated on the branches and nets to hide and feed on the leaves. The food intake increased sharply after 3rd instar and the larvae were 5 instars. (right)
Prevention methods (1) In view of the serious hazards of grasshopper larvae, one must closely monitor the pest situation, increase investigations, increase the scope, area, and species of the survey, and find that young larvae reach the control field, and immediately organize prevention and control. Second, we must seriously grasp the larvae before the winter tracking investigation and census. (2) If the insect is miscellaneous, the weeds in the field should be promptly removed and some of the insect resources eliminated. Autumn or winter plowing can also eliminate some of the mature larvae that are overwintering in the soil. (3) Chemical control Spray 50% phoxim EC at 1500 times or 2.5% at 2000 times.
Organic materials: also known as organic polymer materials, generally by C, H, O and other elements of the relative molecular weight of more than 100,000 (of course, there are other elements, such as S or P, etc.) generally speaking, solubility (divided into two kinds of swelling and dissolution), thermoplasticity (high temperature into the kind of viscosity) And thermosetting (seemingly low temperature and return to solid state), strength characteristics (than carbon or steel and other materials made of general strength is about twice its strength), electrical insulation, general organic materials have rubber, cellulose, protein, starch, high polymer, etc.
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