Codonopsis scientific name Aspidiotus destructor Signoret Homoptera, shield family. Synonyms Temnaspidiotus destructor Signore. Alias ​​Codonopsis cuspidatum, yellow thin cocoon, papaya, malignant roundworm, yellow thin round heart palpitations. Distribution of Liaoning, Hebei, Shandong, Shanxi, Henan, Shaanxi, Jiangsu, Zhejiang, Fujian, Taiwan, Hubei, Hunan, Jiangxi, Guangdong, Guangxi, Sichuan, Yunnan. The host has various plants such as tea, camellia, coconut, citrus, banana, mango, lychee, papaya, grape and so on. 
Damage characteristics? The locust swarm on the back of the leaves or shoots, the front of the leaves are also male and nymphs fixed sucking sap, resulting in macular leaf surface, causing the leaves to fall early, stagnation or dead growth of new shoots, weakening tree vigor .
Morphological characteristics Female shell shell round or nearly round, diameter 1.8mm, colorless to white, thin and nearly transparent. The shell is yellow or white centered or slightly biased. The male and female shells are nearly elliptical in shape, with the same texture and color as females, and slightly more females with a length of 1.1 mm, inverted pears, bright yellow, and easy separation of the shell and body. Male adults are orange-yellow, compound eyes are dark brown, translucent, and needle-shaped mating devices at the end of abdomen. Egg length 0.1mm, oval, yellow-green. Nymphs yellowish green to yellow, coconut round, relatively flat, brown eyes, 1 pair of antennae, 3 pairs of feet, 1 tail hair at the end of abdomen.
Life habits Guizhou is born 2 generations, Zhejiang, Jiangsu, Hunan 3 generations, Fujian 4 generations, tropical 7-12 generations, all after the female adults after fertilization winter. The nymphs of the Guizhou generation began to hatch in the middle and late April, and entered the hatching period in early May. The male plagues the larvae in late May and late June and June and emerges in mid-June and early July. The second generation of nymphs began to hatch in mid-July and entered the incubating period in early August. The males larvae in mid-September and emerged in mid-October. The incubating period of each generation of Zhejiang: from the end of April to the beginning of May, the middle and late July, the end of September to the beginning of October. In winter, there are female adults, male and female larvae, and the first instar larvae are hatched in the late 1st and the second generation nymphs emerge in May. The newly hatched nymphs were scattered and transferred to various departments for fixation. Each female produces more than 100 eggs. Natural enemies mainly have eye-catching ladybugs.
Control methods
??1, to maintain the cultivation of good ventilation and light conditions, reasonable thinning, appropriate dense planting.
?? 2, nymphs can be sprayed during the incubation period of 10% 80% of dichlorvos EC 1000 times, or 50% of the 1000 times the killing of pine EC. The use of 40% cull EC to control 1500 times of Strelitzia reginae, obtained 97.7% control effect.
Quick-pumping EC is an organophosphorus insecticide. Its greatest feature is the ability to kill waxworm shells or wax covering the surface of shell insects, killing the underlying insects and the eggs they produce. The spraying time is not limited by the insect state and can be used at any time during the occurrence of the scale insect. The rapid culling of EC has a very high control effect on the scale insects. The spraying of the locusts can be controlled within 1 to 2 times of the year, and the scale insects can be extinct after 2 to 3 consecutive years of continuous use.
?? 3, pay attention to protect the use of ladybugs, grasshoppers, parasitic bees and other natural enemies.