The scientific name is Bemisia myricae Kuwana. It belongs to the order Homoptera, Acipenseridae. Alias ​​white peony, mulberry, bayberry mealybugs and so on. Distributed in the country's planting mulberry district.
The main mulberry, tea, bayberry, plum, plum, persimmon, citrus and so on.
The traits of the damage are that the nymphs suck the juice of the young leaves, causing the leaves and young shoots to wither, and excreting honeydew to cause pollution, affecting the yield and quality of the mulberry leaves.
Morphological characteristics Adult females were about 1.2 mm long and 0.8 mm tall. Body yellow, covered with white powder. The head sphere is smaller, compound eye is dark brown, and kidney shape. Antennae 7 whip. The wings are milky white with 1 yellow veins. Abdomen section 5 light yellow. Egg length 0.2mm, conical, milky white to light yellow, near hatching into a dark brown with gold shoulder gloss. The larva is 0.25mm long, flat oval, light yellow, covered with waxy material on the body surface, bristles on the side of the body, and dark brown on the end of the needle. Axillary length 0.8mm, flat oval, red compound eye, back white, slightly raised central back.
Life habits are multi-generational, wintering on fallen leaves. In the middle and early April of the Yangtze River, the mulberry sprouted and became an adult, damaging the young leaves, and began to pupate over winter in mid-November. The egg period of Zhejiang is 3 to 6 days, the larval period is 21 to 28 days, and the pupa period is 7 days. The adult's life span is 3 to 6 days. Adults like to lay their eggs on new shoots, young shoots, and dorsal leaves. Tips and leaves occupy 98% of eggs. Each female produces an average of 30 eggs, up to 200 grains. The worms occurred in spring and autumn, and the damage was heavy; the dense planting garden and nursery were heavy.
Prevention methods (1) Clear the leaves of mulberry gardens and nurseries in a timely manner, concentrate deep or burn, and kill the overwintering earthworms. (2) In the summer, during the peak period of spawning, the 1-5 leaves of the branches were removed in a timely manner, and the treatments were concentrated to reduce the source of insects. (3) Spray 90% crystal trichlorfon or 40% Dimethoate EC, 25% Dimethoprim EC, 50% Malathion EC 1000x, 80% Dichlorvo EC or 25% ECA 1500 if necessary. Diluent, 20% imidacloprid (Confodol) Concentrate 3000 to 4000 times solvent. 20% eradication emulsion 2000 times liquid. Also available Baume 0.1 a 0.2 degree lime sulfur.
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