Cotton leafhopper

The scientific name Empoasca flavescens (Fab.) is a Homoptera, leafhopper family. Alias ​​Peach Leafhopper, peach floating dust, Peach leafhopper, Peach green leafhopper and so on. Distributed throughout the country.

Host cotton, eggplant, kidney beans, cruciferous vegetables, potatoes, beets, rice, peaches, apricots, plums, cherries, plums, grapes, etc.

Injury characteristics, nymphs sucking juice, the beginning of the yellow and white spots of the injured leaves gradually expanded into a film, when the whole leaves pale and early fall.

Morphological characteristics Adult body length 3.3-3.7mm, yellowish green to green, complex clothing gray brown to dark brown, no single eye, antennae bristle-like, black end. Pronotum, small scutellum pale green, often with white spots. The forewings are translucent, slightly leathery, yellowish-white, with pale green edges at the periphery. The posterior wing transparent membranous, light blue-green below the end of each foot, claw brown; tarsal section 3; hindfoot jump type. The color of the abdomen's backboard is deeper than that of the web and the end is light greenish green. The back of the head is slightly shorter, protruding forwards, slightly brownish, and green at the base. Eggs are oval in shape, slightly curved, with a major diameter of 0.6 mm, a minor diameter of 0.15 mm, and milky white. The nymphs are 2.5-3.5mm long and resemble adults.

Habits of life 4-6 generations, the adult in the leaves, weeds or low green plants in the winter. The peaches, plums, and apricots of Prunus persicae sprouted and emerged, and flew to the tree to suck juice. After feeding, they spawned and spawned, and the eggs were prolific in the main shoot of new shoots or leaves. The egg period is 5-20 days; in the nymph period 10-20 days, the non-overwintered adult lives for 30 days; 40 days and 50 days are completed in 1 generation. Due to the occurrence of irregularities, generations overlap. The number of insect populations increased in June, and it was the most severe and severe in August-September. After the fall, the last adult was overwintered. Adults and nymphs enjoy daytime activities, sucking sap or habitat at the back of the leaves. Adults jump well and can be spread by the wind. The average temperature is 15-25°C for the growth and development, and the density of the larvae decreases when the temperature is above 28°C.

Control methods (1) Adult worms remove defoliation and weeds before they emerge, reducing overwhelming insect sources. (2) Mastering the inoculation of overwintering adults, each generation of nymphs will be sprayed in a timely manner with 20% Yefensan (Xiebuwei) EC 800 times or 25% Velophane WP 600-800x, 20 % Snapbuster EC 400 times, 50% Malathion EC 1500-2000 times, 20% Chrysanthemi 2000 times, 2.5% EOD or Kung Fu Emulsion, 50% anti-Conway Wet powder 3000-4000 times liquid, 10% imidacloprid wettable powder 2500 times, 20% buprofim EC 1000 times, 40% methicillin 1500 times, 2.5% WP 2000 times, 35 % Saitan EC 2000-3000 times, can receive better results.