Caterpillars are born one generation. The egg grows winter and winter. In the next spring, the trees hatch when the trees spit. The young larvae clustered on the branchlets near the egg mass to damage the tender buds, and they gnawed and knotted at the tree twigs, feeding at night, and clustered in the net nest during the day. The larvae shed on the wire mesh and began to disperse as they approached maturity. During the day, the larvae often clustered in the lower part of the trees or at the tree sedges. The mask was covered with a very thin silk screen. In the evening, it is scattered on the trees for feeding. On cloudy days, it is sometimes possible to continue feeding without leaving the tree. The food intake of mature larvae is greatly increased, and they often become overeating in the short term. In the other provinces had serious damage to the mountain apricot caused by large dead. The roots of the trunk are cut to the bottom of the trunk, under the stone seams, under the litter layer, and pods and phlegm. Half of the puerperium period, adult ecloses spawn and spawn. The spawning was at the top of the branchlets that year, and the eggs were arranged in a ring like an thief.
1. Biological control: In combination with winter pruning, cut off the overwintering egg pieces on the branch shoots. The effect is significant. The larvae colonize during the day and the large larvae often clump on the branches and stay quiet during the day, allowing them to kill. 2. Physical control: Adult phototaxis can be controlled by placing black light or high pressure mercury lamp in the orchard. 3. Artificial control: During the winter cutting of the fruit trees, pay attention to cut off the egg pieces on the branchlets and concentrate on burning them (preferably put them together in the parasite incubator to return the parasites to nature). The net larvae of the spring larvae on the tree are obvious. Before the larvae disperse, the insects are cut off or killed in time. The dispersed larvae can kill trees. 4. Chemical control: Chrysanthemum and organophosphorus pesticides are used alone or in combination, according to the usual dosage of foliar spray. The commonly used agents are: 80% DDVP 1500 times or 90% trichlorfon crystal 1000 times, 50% phoxim EC 1000 times, 10% bromo horse cream, 20% chrysantha 2000 times; 2.5% kung fu Or 2.5% killing EC such as 3000 times.
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