The branches, petioles, and veins of the chestnut tree have long, enlarged nodules, which are caused by the damage of the chestnut bee. The color of tumors changes from green to red, affecting plant growth and results, and severe damage can lead to plant death. Litsea herdae occurs one generation a year. It is larvae wintering in buds and occurs again in early April of the following year. In June, the stalks and veins of the chestnut shoots were turned into tumors. The larvae of the chestnuts were bred in early July and were bitten for approximately 15 days (days). A hole is drilled out of the cocoon, spawning in full shoots. A female can produce 12 to 25 capsules, and the egg continues to harm the chestnut tree after hatching. Its prevention and control methods: Disinfestation in winter. Combine chestnut tree pruning to cut down the damaged twigs in the lower part of the canopy. The tall chestnut tree can be cut and burned with a razor blade at the end of the bamboo pole to eliminate overwintering larvae. 2. Protect natural enemies. The natural enemies of Chlamys farreri are parasitic wasps. In general, from April to May, the parasitoids are active. During this period, avoid spraying on chestnut trees to protect parasitoids. 3. Spray with an agent. In June, 90% trichlorfon 600-800 times liquid spray, or 80% dichlorvos 600-800 times liquid, the effect of insecticide can reach more than 97%. 4. Release aerosols. In July, during the eutrophic season of the chestnut maggots, the aerosol was sprayed, which has a very strong killing effect.
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