The scale insects are the most harmful pests of peach trees and plum trees, and they adsorb on the leaves and fruits to suck juice, yellow the leaves, dead leaves and fruits, and secrete thick honey liquid to induce soot, affecting photosynthetic activity. Effect, weakening the tree vigor, affecting the fruit development and mature coloring, make the fruit deformed. As the scale insects are damaged when the peach trees and plum branches are lush, they are blocked by the leaves when they are controlled by chemicals, and the liquid medicine cannot fully contact with the scale insects. The effect is very poor. After the peach tree and the plum tree are deciduous, the foliage is less shielded, the liquid medicine is easily exposed to the scale insect, and it is easy to kill it, so the control effect is more effective.
Specific prevention and control methods: After clearing the leaves in peach trees and plum trees, remove the various weeds, litter and fallen fruits around peach trees and plum trees, and focus on deep buried or burned outside the park. Spray 1500 times 20% aqueous solution of buprofezin WP or 1500 times of aqueous solution of 0.5% phenoxyxifen suspension, or 1500 times of 20% aqueous solution of thiamethoxam, or 1500 times of 5% of acetamiprid. Emulsion solution, or 1500x 48% chlorpyrifos solution, or 1500x 0.5% veratrine wettable powder in water. After 15 to 20 days, another 0.8 to 1 bumeide lime sulfur solution was sprayed inside and outside the crown. Pay attention to spray on the scale insects, evenly spray all the branches inside and outside the crown to start dropping drops of water.
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