The scientific name is Polyphagotarsonemus latus (Banks). Alias ​​tea, tea, tea, tea, tea leaves, tea leaves, etc. It is distributed in tea production areas and most vegetable areas in the country.
Host tea, cotton, jute, solanaceous vegetables, soybeans, peanuts, citrus, grapes, cabbage, beans and so on.
The main damage was the damage of young shoots of tea trees. The leaves were brown on both sides. The leaves were hardened, brittle, thickened, atrophied, slowed or stagnated, and the shoots were reduced by about 63%.
The morphological features of the female skeleton is about 0.21mm long, oval, wider, abdomen end truncated, pale yellow to orange yellow, thin and transparent epidermis, so the corpus callosum was translucent. There is a longitudinal leucorrhea on the back of the body. The feet are shorter, and the fourth pair is slender. The ends of the knot are end hairs and sub-hairs. There are 4 pairs of bristles in the ventral hind foot body. Pseudo-valve organs expand toward the back end. The mandarin duck is about 0.19mm long. Forefoot has 3-4 pairs of setae. There are four pairs of bristles on the ventral surface of the hind foot. The feet are long and thick, and the base sections of the third and fourth pairs of feet are connected. The fourth pair has an ankle and ankle slender and bends inward. The distal l/3 has a particularly long whip hair, and the claw degenerates into a button shape. Egg oval, colorless and transparent, the surface with longitudinal fissures. The cubs have a white longitudinal band, a pair of feet, and a pair of bristles at the abdomen. If the ellipse is oblong, it is a stationary stage of growth and development, and it is covered with the skin of the pup.
Life habits are multi-generational, and wintering occurs when the female adults fall into the leafy backside or weeds in the tea tree bud scales, petiole areas, or tea branches. Hunchun spawned eggs scattered on the back of buds or young leaves, each of which spawned a l06 grains, the egg phase l-8 days, the young quail, if the puerperium period 1-10 days, the early spawning period 1-4 days, into Storks live for 4 to 7.6 days, and the wintering females become up to 6 months. It takes 3 to 18 days to complete the generation. The 20th generation of Sichuan Mingshan, Yongchuan 30 generations, generally occurs less before May and rises rapidly from June to July. Especially in the case of high temperature and drought or the occurrence of large seasons, severely affect the production of summer tea and autumn tea. The pest center is obvious. The optimum temperature for the development and reproduction of Astragalus membranaceus is 16-23°C, and the relative humidity is 80%-90%. Generational duration of development: 28-30 °C, 4-5 days; 18-20 °C, 7-10 days. When the feeding site is getting older, it immediately shifts to the new young site and carries the female raccoon. The latter turns into a pod on the male corpse and then becomes a fleas. Mating, and settled on young leaves, because of this strong tenderness, so called "green leafhoppers." Eggs and larvae have high humidity requirements and can develop only when the relative humidity is above 80%. Therefore, a warm and humid environment is conducive to the occurrence of ochre.
Prevention methods (1) Selection of varieties with anti-anthraquinones such as 黔湄502, 黔湄70l, 蜀 Yong 2, 蜀 Yong 3, 蜀 Yong 703, Mengshan ll, Mengshan 16, Mengshan 23, Taiwan tea l0, Taiwan tea on the 16th. (2) Pick up tea in batches and in batches. Before harvesting in the autumn, pick it clean and remove the weeds in time. (3) The life cycle of the tea plant is relatively short, and its fertility is very strong. Special attention should be paid to early prevention and control, timely inspection of the insect condition should be strengthened, and prevention and treatment should be conducted at the early stage of occurrence of the tea plant. Generally, in early and late May and early June, when the first leaf is damaged in the early flowering stage, it should be controlled. 40% of the effective insecticides for the tea seedlings are antimony 23% 5000 times or 73% chlorinated oil. L000 times liquid, 25% buprofezin WP 2000 times, 25% chlorfenone WP or 10% imidacloprid WP 1500 times, 5% nisoli EC 2000 times, 2.5% Uranus EC 3000 times liquid, 20% compound Liuyangmycin EC 1000 times, 15% Chano ketone EC 3000 times, 0.12% Tian Li No. 2 WP 1000-l500 times, 35% SAD 2000-3000 Double fluid, the effect is better. The drug was stopped 7 days before picking tea. (4) To promote the release of Duchenne obliquus, release 15,000-20000 heads per 667m2, release time from September to March next year is appropriate.
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