Leafhopper is an important pest in agricultural production, commonly known as red spider, belongs to the arthropoda, Arachnida. The species that cause more serious harm in China are the cinnabar, leaf truncatum, leafhopper, apple all-claws, two-spotted spider mites and citrus all-claws. The leafhoppers are small in size and mainly harm the leaves and also harm young shoots, buds and fruits. Damaged areas are often slightly shorter, and product quality and production are significantly reduced.
Ye Yan occurs in multiple generations a year and flourishes in the spring. High temperature and drought are favorable for most leafhoppers, but continuous high temperature inhibits the proliferation of leafhoppers. High humidity limits the occurrence of leafhoppers, and heavy rain significantly reduces the number and damage of leafhoppers. Apes develop rapidly, generally 20 to 30 days can complete a generation, high reproduction rate, can be carried out with the environmental changes of sexual reproduction and parthenogenetic reproduction, combined with small individuals, early and difficult to detect, so often outbreaks. The leafhoppers are small in size but crawl quickly. They can also spread quickly due to the drooping drooping winds, even with the special ascent and translational air currents. Therefore, the wind is an important factor in the spread of leafhoppers.
In the northern area, leafhoppers usually pass through the winter with females and adult males, and they also have winters as males, plagues, or eggs. The locations vary depending on the species, including the soil, branches of trees, litter and weeds on the fields. Therefore, removing the weeds in the fields, scraping the barks in the winter, and destroying the litter in the orchards and plowing the soil all have certain control effects. Since leafhoppers attached to clothing, livestock, agricultural machinery, seedlings, flowers, fruits, and vehicles can be transmitted over long distances, strict phytosanitary measures are important measures to prevent the spread of leafhoppers.
Since leafhoppers and insects are different classes of animals, not all "insecticides" are effective on spiders. The specialized acaricidal agents include chlorenone (Broomfly), acetylene (Ketite), benzoquinone (West of the Star), and dimethyl ether (Dioxime). Examples of insecticides that can cope with terpenes include avermectin, methotrexate, fluvalinate, chlorpyrifos, and flufenoxur (carrageenan). Lime sulfur is a rare bactericide that can both cure leafhoppers and scale insects.
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