Tea tree tea hard horse

Scientific name Scirtothrips dorsalis Hood belongs to the order Thysanoptera, Thripidae. Alias ​​Tea Hummer. Distributed in Hubei, Guizhou, Yunnan, Guangdong, Guangxi, Taiwan and other provinces.

Host tea, peanuts, straw grapes, grapes, mangoes and so on.

The characteristics of the damage are adult worms and nymphs, which mainly damage young leaves. There are two or more columns of reddish-brown streaks on both sides of the main vein of the victim's back, and the leaves are convex. The serious back of the leaves is brown, causing the leaves to roll inward and the buds to shrink, which seriously affects the growth of the tea. development.

Morphology Female adults have a body length of 0.9mm and a yellow-orange body. Antennae dark yellow 8 knots. Compound eye slightly prominent, dark red. Monocular bright red, arranged in a triangle. The forewings are orange-yellow, narrow, with a small yellowish area near the base, 24 basal ridges, 413 bases of the anterior venation, 3 pterygoids, 1 in the middle, 2 in the middle, 2 in the posterior venation. . Abdominal dorsal segments 2-8 have dark front ridges, but sections 3-7 only exist on both sides, and the anterior middle is about l/3 dark brown. There is a dark horizontal line on the leading edge of Section 4-7 of the web. Eggs pale yellowish white, kidney-shaped. The nymphs are milky at the time of hatching and become pale yellow afterwards, resembling adults, but the body is smaller than the adult and has no wings.

Habits of life 5-6 generations, with nymphs or adults in the rough skin or bud scales over winter. Activities began in April of the following year. In the middle and early May, the nymphs attacked the young leaves on the tip of the new shoots. When the major events occurred, there were 470 to 840 hundred buds. Tawny horses can carry sexual reproduction or parthenogenetic reproduction. Female pheasant gems can be produced at the lobe veins or leaves in 2-3 days after eclosion; each female produces tens to hundreds of eggs. After nymphs hatch, they all fall on the back of the young leaves and cause injury. Adults are lively, jumpy, and able to fly short distances when frightened.

Prevention methods (1) Tea picking in time can directly remove some eggs and nymphs, timely shoots new shoots, reduce their food, unfavorable to their development, and can reduce occurrence. (2) To prevent and control nymphs as early as possible, a large amount of tea gardens should be sprayed with 40% dimethoate EC or 50% phoxim EC or 95% battamone 1000-1500 times for the above insecticides. Anti-drug area can be used 5% Rui Jin Sufu 2500 times or 35% Sai Dan EC 3000 - 4000 times, 15% Dai Ling EC 2000 - 3000 times, 20% imidacloprid (Confado) can be Solvent 3000 to 4000 times, 1.8% albircin EC 4000 times.

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