The scientific name Paralepidosaphes tubu10rμm (Ferris) Homoptera, Shield Polygonaceae. Alias ​​Oriental shield 蚧. Distribution Anhui, Zhejiang, Shanghai, Fujian, Taiwan, Guangdong, Guangxi, Guizhou, Sichuan, Yunnan. Southwest tea area suffers from frequent injuries.
Host tea, oil tea, mulberry, persimmon, black cypress, willow and so on.
The characteristics of the female adults and nymphs are attached to the surface of the branches and leaves to suck the juice, resulting in thin and thin leaves of the tea buds. In severe cases, the branches and leaves of the tea buds or the whole plant die.
Morphological characteristics Female shell shell length 3-4mm, long, slightly curved, large rear, the back of the bulge, like oyster shell, dark brown, gray shell edge, shell grayish brown, prominent in the head. The male shell is about 1.6 mm long with a dark brown front and a reddish-brown rear end with a yellow ribbon pattern. The shell edge and shell point are the same as the female shell. The female adults are milky yellow, orange-yellow at the end, spindle-shaped, mouthparts filamentous, yellow-brown. Male adults orange-yellow, head black, antennae filamentous, translucent wings. Eggs are oval in shape, colostrum is slightly reddish-white, and later becomes pale purple. The nymphs are flat, oval, light yellow in the body, and have purplish red eyes. The antennae, feet, and tails are distinct and secrete pale yellow wax.蛹 0.9mm long, slightly reddish body, black eyes.
Living habits Sichuan and Guizhou tea districts are born 2 generations old, and they use eggs to winter in the shell. Guizhou is incubated from mid-April to late May in the following year. In mid-May, it enters an incubating period. In the middle of May and late June, the male plagues and emerges. In the middle of June and late July, female adults lay eggs. In mid-July, In the first half of September, the second generation of nymphs appeared. In early August, they entered into the incubation period. In mid-September, mid-September and mid-December, they became males and females. In late September and late October, they emerged. In mid-October and late November, the female adults laid their eggs in winter. . 40 to 60 eggs per female. The newly hatched nymphs are very lively, and can reach the shoots or shoots in the shoots or tea bushes 24 hours after hatching. There are many hidden places and there are more leafy males than females. There is a difference in the degree of occurrence between varieties. Guizhou Gaotan 419 and Guangxi’s Gaojia Tea were lightly victimized, and Xiaotan Mosui’s tea was heavy. Natural enemies have long beaks, bees and bees.
Control methods (1) Note the selection of insect-resistant varieties. (2) Pay attention to quarantine of seedlings. (3) Do not pick the tea plantation and the stumps left behind by the banyu and timely spray Baume 0.5 lime sulfur compound or rosin mixture 20 times. For other methods, see Changbai.
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