Scientific name Eriococcus lagerostroemiae Kuwana Homoptera, Velvet. Distribution of Northeast China, North China, Central China, East China. Host crape myrtle, pomegranate. The characteristics of damage are female adult and nymph, which damage the host stems, buds, suck juice, and induce coal pollution, affecting their growth and development. When severe, the branches and leaves become dark, the leaves fall early, the flowering is abnormal or the whole plant withers. Morphological characteristics Female adults have a body length of 2.8mm, oval, dark purple, and they are covered with a white velvet shell. Male adult 0.3mm, wingspan about 1mm, long, purple. Egg length 0.25mm, oval, purple. The nymphs are purplish red, oval in shape, surrounded by spikes, and a pair of buttocks in the buttocks. The male dragonfly is oval, purple-brown. About 0.4mm long, white, velvet, wrapped outside the male. Life habits are 2 generations old, wintering in branch gaps with 2nd instar nymphs, and continued development in late spring in March. In mid-April, the wintering generation nymphs differentiate into males and females, enter the male adult in May, and mature females begin to secrete velveteen shells. . Oviposition begins in late May. One generation of nymphs appeared in mid-June, and female and male adults appeared on the first generation in July. In mid-August and late-September, the second generation of nymphs entered the incubation period, and mostly settled on the host shoots. By the end of October, they developed into 2nd instar nymphs through the winter. Prevention and control methods (1) In autumn and winter, pest branches are eliminated in time to eliminate the overwintering insects. (2) After the fallen leaves or before the budding of spring, spray the wave of beauty 3. Lime sulfur eliminates overwintering nymphs. (3) In the middle of June and the end of August, 2 generations of nymphs will be sprayed with 2000 times of cypermethrin 2000 times or 40% of dimethoate 1000 times when they enter the incubation period. Hydrolyzed Sponge White Powder Sponge Chengdu Sino Tech company , https://www.cnherbfun.cn