Economic fruit forest is vulnerable to beetles during the young forest period. The beetle larvae, also known as "white soil silkworms" and "cockroaches," harm the seeds, roots, and seedling stems in the soil and are the main pests in nurseries. Adults eat a large number of peaches, pears, plums, chestnuts, ginkgo, etc., as well as leaves and tender crops. Branches and fruits seriously affect tree vigor and yield. There are many types of chafers, which last for one to three years. Adults and larvae live in the soil for winter. When the temperature rises above 17°C, they begin to be active, and 22°C and above are the most dangerous. Adults in April and May are the peak of the hazard, and the hazard period can be extended to September. During the daytime, they are lurking in the loose soil, in the grass or on the back of the leaves, and fly out of the hazard at around 7 o'clock in the evening. The newly-opened Orchard has a large density of worms, and adults have phototaxis and suspended animation. Its prevention and control technology: First, the toxic soil method uses 3 kg of dichlorvos per acre, and the water is mixed with wet fine soil or earthworms, evenly sprinkled under the canopy, combined with cultivator weeding and turning into the soil, killing adults and larvae. Second, the spray method in adulthood with 1000 times liquid dichlorvos or 2000 times liquid enemy kill, 1500 times liquid dimethoate spray tree body, can play a role in inhibiting harm. The spraying time is better from afternoon to dusk. Third, the antifeedant method uses 1:2:160 Bordeaux mixture (copper sulfate 1 kg, quicklime 2 kg, water 160 kg) to spray the leaves to grayish white, 2 times in succession, 15 days apart. Fourth, the capture method uses the adult's animation and phototaxis, and organizes human capture at 8:30-10:30 at the end of the adult's endangered period. It suddenly shakes the trunk at night and kills adult insects. It uses black light from late May to late July every year. Lights, lights trapping, the effect is good.
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