Tea small green leafhopper is a hemiptera, an insect of the leafhopper family, commonly known as floating dust, leaf jumper, etc., which occurs widely, and occurs in all tea-producing provinces and autonomous regions across the country.
Tea small green leafhopper sucking juice hazards
First, the harm of small green leafhoppers:
1. The small green leafhopper is divided into two kinds: tea small green leafhopper and false-eyed small green leafhopper. Among them, the small green leafhopper of tea is mainly harmful, and it is one of the main tea pests. The worm occurs in about 8-12 generations a year, and the generations alternate. Tea small green leafhoppers suck the sap of the young shoots of tea trees with nymphs, consuming nutrients and water; the lateral veins of the affected leaves become red, the leaf tips and leaf margins become reddish brown and scorched; the internodes of the victim new shoots are shortened, and the buds and leaves wither. Buds grow slowly or stop, new shoots decrease, or even fail to germinate. In severe cases, all the new leaves are scorched and shed, and the buds drawn out in the subsequent tea seasons are thin and small, and the new shoots are thin and short, which seriously affects the yield and quality.
2. The degree of damage of adult and nymphs is divided into 5 levels: 0 - the bud leaf growth is normal and uninvased; 1 - the affected bud leaves show wet spots, and temporarily wither at noon on sunny days; 2 - red vein stage, leaf vein stage, leaf veins, leaf edges become dark red, facing the sun clear opinion; 3 - scorched edge stage, leaf veins, leaf margins turn red and expand to the middle of the leaf, leaf tip leaf margin gradually curled, "scorched head", "scorched edge", bud leaf growth stagnation; 4 - scorched period, scorched to the whole leaf expansion, until the whole leaf scorching, and even off. It's like a fire.
(From left to right: hazard infancy - hazard mid-hazard post)
Second, the occurrence of small green leafhoppers in the whole country
Tea leafy green cicada occurs regularly
Third, the main habits of small green leafhoppers
1. Tenderness: Adult and nymphs of tea small green leafhoppers have the tendency to be tender and harmful, mainly inhabiting the leaf back activity hazards of young leaves at the buds, and the daily two and three leaf dorsal insect mouths under the buds are more, and the eggs are mostly produced in the new shoots and young stem tissues.
2, colorism: adult insects prefer yellow-green and light green.
3, like to run rampant, good at jumping: in addition to the juvenile nymphs are more dull, after three years of age, they become lively, good at climbing and jumping, jumping and quickly escaping along the tea branch when they are slightly alarmed.
4. Fear of light and moisture: often inhabit the back of young leaves in the buds, do not move when the rainy day or morning dew is not dry, and active after the dew is dried within a day, gradually strengthening. At noon, the sun is strong, the activity is temporarily weakened, and the self-canopy is shifted from the inside.
Tea plant cultivation management
Fourth, the prevention and treatment of pharmaceuticals
1. Agricultural prevention and control:
Timely cleaning of weeds in and around the tea garden to reduce the density of overwintering adults and insect populations in the same year, and removing weeds before spraying can improve the efficacy of the drug. Timely harvesting reduces the place where adults lay eggs and have young shoots to inhibit the occurrence of insect pests. Reasonable fertilization, in addition to the application of organic fertilizer to enhance the growth of tea plants. Intercropping some plants in tea gardens will significantly improve the ecological control ability of tea gardens.
2. Pharmaceutical prevention and control:
Organic tea garden control method: 0.3% neem emulsion 600 times + 30% tea saponin 400 times liquid or 0.3% neem emulsion 600 times + 1.5% pyrethroid 600 times uniform spray, use more than 2 times continuously, interval 7-10 days.
Common tea garden control methods: indinale, chlorhexabenz benzamide, fluridinamide, insect mite nitrile, zoloftamide and other pesticides are used alternately.
3. Physical prevention and control:
Taking advantage of the tenderness and colorism, the tea garden is equipped with yellow armyworm plates.