Mulberry spiders are also called fire dragon bugs and often harm mulberry trees with mulberry horses, which results in reduced yield and quality of mulberry leaves. The adult larvae, nymphs and larvae of the hazards all sucked juice on the back of the mulberry leaf, which enhanced the transpiration of the mulberry leaves, discolored the chlorophyll, and showed spots of discoloration on the leaves. The photosynthesis of the mulberry tree was inhibited. The damaged leaves were hardened due to water loss and the leaf quality was reduced, which was used to feed silkworms, resulting in weak silkworms and reduced silkworm cocoon production. The heat and drought season is more hazardous. Causes of Drought: Drought and little rain are the main factors in the outbreak of Mulberry spiders. The longer the drought lasts, the heavier suffers Mulberry trees. Mulberry landform: Where mulberry fields are close to roadsides, ditches and overgrown weeds, mulberry trees suffer more due to more worms. Control methods 1. Eradicate overwintering weeds and eliminate insect sources. Mulberry spiders are wintering on the surface of weeds. They must remove the weeds and leaves from the mulberry field before the convulsions and eliminate the source of insects. 2. Chemical control. After the mulberry spiders have been sprayed, they are sprayed with 20% dicofol 2000 times, which can kill the adults and kill the eggs. It can also be sprayed with 73% Ketek emulsion 3000 times or 40% Dimethoate 1000 times. Mulberry spiders are more harmful to the back of the colony. The sprayer should be upward when spraying, the pressure should be sufficient, and the dose should be large. Pay attention to the safety intervals of various pesticides on silkworms. The residual period of toxic residues of Dimethoate and dicofol is 5-7 days, and the length of Ketete is 10 days. During the sericulture season, it is possible to slice and fight drugs. After the residual period, try to ensure the safety. Baoer grows safely.
