Three kinds of plum common pest control
There are more than a dozen pests that harm plum blossoms. The most common ones are plums, aphids, and scale insects. The following describes the characteristics of these three pests and their prevention and control methods.
The caterpillar plum caterpillar head is blue-gray, with two dark spots, yellow-white back lines on the back, two yellow lines on each side of the body, and many yellow-white long hairs on the body, usually 5 cm long. Larvae often spit on branchlets and eat plum blossom sprouts and young leaves. When they grow up, they are scattered throughout the plant and eaten away from the leaves. In severe cases, the leaves will be completely eaten. The control of the plum caterpillar can be sprayed 1,000 times in its young age.
Aphid larvae mainly harm the young stems and young leaves of plum trees, and absorb plant nutrition. Mumes often appear in the affected parts of the plum tree, and the leaves are discolored, shrinking, rewinding and withering. In severe cases, the whole plant can die. Can spray 40% of the omethoate 1000 times water solution, can also be used 80% dichlorvos against 2000 times the water spray, spray 2 to 3 times to eliminate.
Scale insects scale insects, also known as insects or ball python, adult body nearly spherical, initially soft shell, brown, later turned dark brown, body surface with many yellow-white, dark brown and white stripes. Scale insects start their activities in early spring and draw plant juices. The diseased plant leaves yellow and wither and fall off. At the same time, the liquid sugar excreted by scale insects can induce other diseases. Can be manually scraped and sprayed with drug combination control. The drug can be sprayed with 80% of dichlorvos EC emulsion to 1500 times water, or 60% of wettable dimethoate powder to 1200 times water.
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