1. Peach borer
The peach borer is the main pest of the peach tree. In addition to harming peach trees, it also harms a variety of fruit trees and crops such as corn and sorghum. Old mature larvae overwinter in bark crevices, tree cavities and crop orange stalks. After hatching, the larvae mostly moth from the fruit peduncle or the fruit and leaf and the fruit and fruit junction, and moth into the fruit heart. There is a large amount of insect feces and yellow-brown glue inside and outside the fruit. After the larvae mature, they mostly pupate at the stalk or at the junction of the two fruits. Control methods: (1) In winter, timely burn corn, sorghum, sunflower and other crop straw to eliminate overwintering larvae. (2) Reasonable pruning, reasonable fruit retention, to avoid dense overlap between branches and leaves and fruits. (3) Pharmaceutical control: 20 days before the fruit ripens, use 90% dimethodium soluble powder 1000 times liquid, or 2.5% cypermethrin emulsion 5000 ~ 6000 times liquid control. (4) Crops such as corn, sorghum, and sunflowers should not be intercropped in the peach orchard.
2. Aphids
The aphids that harm peach trees are mainly peach aphids and peach powder aphids, which mainly harm the young shoots and leaves of peach trees, and the leaves are damaged and shrink, affecting the formation of flower buds and weakening the tree potential. Eggs in the peach, plum, plum, cherry branches between the axillary, cracks, pasted branches of the dry curly leaves overwintering, the beginning of March of the following year began to hatch, nymph colonies on the bud hazards, after leaf spreading, adults and small nymphs live in groups on the back of the leaves to feed, constantly giving birth to small aphids. After the leaf is killed, the back is irregularly curled and twisted, the leaves turn yellowish white, and the young fruit falls off. May is the peak of the hazard, the winged aphids migrate to the cabbage, radish, cabbage and other crops to harm, until October, and then fly back to peach, plum and other trees for wintering. Control method: Spray 1 Pomeranian 5° stone sulfur compound before the peach tree germinates to eliminate the overwintering insect eggs. Prevention and control methods: 2.5% cypermethrin emulsion 6000 ~ 8000 times liquid, 70% imidacloprid water dispersible granules 1000 times liquid, 52.25% cyanogen chlorpyrifos 2000 ~ 2500 times liquid, avy high chlorine 1.65% emulsion 2000 ~ 3500 times liquid, in order to improve the adhesion of the liquid, add an appropriate amount of laundry detergent or detergent to the liquid.
3. Mesquitea
The main species of mesozoites that harm peach trees are Korean bulbous spp., apricot bulbous spp., and oriental helmetworm. It often occurs in peach orchards. Nymphs and adults gather in branches, leaves and fruit stalks to suck sap, which induces bituminous coal disease, the victim part turns black, the tree gradually weakens, and the whole plant dies when severe. Control methods: (1) Spray 5 ° stone sulfur compound once before winter pruning and germination to eliminate overwintering female adults. (2) In mid-to-late May, spray prevention and control with 40% phosphorus 800 to 1000 times liquid, or 52.25% chloryanide chlorpyrifos emulsion 800 to 1000 times liquid spray prevention and control. (3) When the trunk insect body is densely packed into pieces, it can be removed with a hard brush brush, collected with a film under the tree, burned the insect body, and the trunk is coated with Baume degree 5 ° stone sulfur compound control. (4) Protect natural enemies. Seven-star ladybird, black-edged red ladybird.
Fourth, peach small heartworm
Peach small heartworm, referred to as peach small, is an important pest of apples, pears, peaches, dates, hawthorns and so on. Apples suffer the most. The larvae generally moth in from the calyx of the fruit, and the hole is the size of a needle tip. After 2 to 3 days of borer fruit, the borer hole is hung with water plant-like pectin overflowing, and after drying, it becomes a small white wax spot. The larvae eat the flesh of the fruit in a longitudinal and transverse string and excrete feces, forming a "bean paste filling" fruit. The appearance of the early victim fruit is deformed to form a "lion's head fruit", and the late victim fruit is not deformed. Control methods: (1) Remove insect fruits. Timely removal of the affected fruit and the fruit of the ground insect, centralized treatment, eliminate the source of insects. (2) Pharmaceutical control: spray control with 48% chlorpyrifos emulsion 2000 times liquid, 2.5% cypermethrin emulsion 2000 times liquid, 20% cypermethrin emulsion 2000 times liquid, 1.65% avie perchlorinated emulsion 2000 times liquid spray control.
5. Pear small heart-eating worms
Pear heartworms are important pests of apples, pears, peaches, cherries and hawthorns, mainly harming fruits and young shoots. After the new shoots are damaged, they wither and wither, the fruit is killed, the larvae go deep into the heart of the fruit to eat, and rot and turn black around the borer hole, which seriously reduces the quality and yield of the fruit. Prevention and control methods: (1) Pear orchards and apple orchards should avoid mixing with peach trees. 2) Winter pruning, completely remove the upturned bark on the branches, the air root pack, scraped off the bark concentrated burning, eliminate the source of overwintering insects. 3) Pharmaceutical control, can be controlled with 48% chlorpyrifos emulsion 1000 times liquid, 20% cypermethrin 2000 times liquid, 20% cypermethrin emulsion 3000 times liquid, 25% urea No. 3 suspension 800 times liquid, 4.8% high chlorine · methyl vitamin salt emulsion 6000 times liquid, 52.25% chlorhenogen • chlorpyrifos emulsion 2000 times liquid, 1.65% avyl perchlorine emulsion 2000 times liquid.