Scale insects
Jujube mealybugs and turtle wax clams are all scale insects that injure jujube trees.
Juvenile wax turtles occur one generation a year, and the females of fertilized females live on 1-2-year-old branches. In April of the following year, when the tree body sprouted, it began to suck and suck the sap, increasing the size of the body. Oviposition begins in mid-May. In early July, the egg hatches. The nymphs and female adults are fixed on the branches, leaves, and fruits to suck juice. The discharge induces the spread of mold. The branches, leaves, and fruits are covered with black mold and directly affect the photosynthesis, resulting in a large number of fruit drop and tree vigor decline.
Jujube mealybugs occur in 3 generations a year. The nymphs live in winter in the bark seams. They begin their activities in April and lay eggs in early May. The nymphs in each generation have a flourishing period of early June, mid-July and mid-September. A large number of winters began in early October. Every year the first and second generations (June-August) are the worst. Adults and nymphs harm shoots and leaves. The yellow leaves of the victim were destroyed and the jujube fruit wilted, causing the tree vigor to weaken and the yield to decline.
Prevention and control measures: (1) Combine pruning in the winter, cut off pests, and burn them centrally. (2) Protection of natural enemies, such as the esoteric insect shield long-horned golden wasp, the parasitic insects of the body, the bees, followed by ladybugs and predatory insects. (3) Chemical control, such as sneezing 1500-2000 times more fluid than 7500 times that of nymphs during the peak period of nymph hatching. Complex with silicone effect is better.
Ma Zhifeng reminded the majority of farmers that from early December to late March, the overwintering period of dormancy of Zaojiao, Zaojiao, Zangzao, Huangxie, Zaishixiangjia, Zaojiao, etc., can be used by various growers. After the soil was thawed in autumn and winter or early spring, the Zaoyuan deep-turned or shaved tree trays were picked up in time to pick up cockroaches and cockroaches and reduce the number of overwintering insects. Combine the winter shears to clear the fallen leaves and fallen fruits in the jujube garden. In mid-March, a plastic sheet was tied in the lower part of the trunk, and the mouth was opened downwards to form a trumpet. This prevented the adult females of the worms from laying eggs on the trees and killed the females every morning.
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