Welcome to subscribe to this number, we will push the latest agricultural planting technology, agricultural latest information and small practical agricultural machinery information every issue.
The peach leafhopper belongs to the family Homoptera, also known as the peach leafhopper. Harm peach plum, apricot, hawthorn, apple, etc., to peach trees the most serious harm. The small leafhopper, also known as the peach leafhopper, belongs to the family Leafhopper of the homoptera, also known as the peach leafhopper peach small floating dust, peach leafhopper and so on. In addition to peach, apricot, plum, cherry, plum, grape, etc., it also harms cotton, soybeans, cruciferous vegetables such as wood hibiscus.
1. Harmful symptoms and habits
Adults and nymphs suck up the sap of young leaves, calyxes and petals of host plants to form translucent spots. After the flowers fall, the damage is concentrated on the back of the leaves, and many gray-white spots are formed in the back of the leaves, and in severe cases, the leaves are pale, the leaves fall early, and the tree is weak.
2. Prevention and control methods
A, agricultural control after the autumn to completely remove leaves and weeds, concentrated burning, in order to reduce the source of insects, and combined with winter and spring pest control, spray stone sulfur compound and other insecticides on the surrounding evergreen plant hosts, greatly reduce the density of overwintering insect population; timely removal of weeds in the garden during the growing season, strict prevention of cross-concealment of pests.
b. Chemical control In March, the overwintering insect migration period, the first generation of nymph hatching in mid-to-late May, the second generation of nymph hatching after fruit harvest in mid-july and late July, the above is 3 important periods, spray 25% chlorpyrifolid wettable powder 1000 times liquid, 20% cypermethrin 2500 times liquid or 25% pyrithodone wettable powder 2500 ~ 5000 times liquid.