Peach tree spider threatens damage and prevents loss

Occurrence of the leaves of the damaged leaves first appear yellow spots, with the increase of worm population and expand into pieces, severe damage when the leaves scorch off, sometimes from July to August a large number of leaves, affecting tree vigor and flower bud differentiation.

Hawthorn spiders use fertilized females to overwinter in the cracks in the stem bark and in the soil blocks near the base of the trunk. During the year of major outbreaks, they can also lurk in winter under the defoliation, undergrowth or clods. Each year, algebra varies from place to place, usually from 3 to 9 generations, and the period of damage is roughly from April to October.

Control methods 1. Scrape bark in early spring to eliminate overwintering adults. 2. The lime-sulfur synergist has buds with a Baume degree of 1 to 3, a growth period of 0.3 Baume, and a 50% trisulfite emulsion of 3000 to 4000 times. The insecticide has a good effect. 3. Acaricide killing net: spray 2000 times, Liuyangmycin (Huaguangmycin, chloricillin) 5% EC 500 times and 10% EC 1000 times, 20% broom net WP (Fu Ling, fast ketone) 1500 to 2000 times liquid, 25% triazole tin wettable powder 1000 to 1500 times liquid.

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