Soybean small gray elephant armor, body length of about 4 mm, body small, body color gray-green to gray-brown, similar to earth color, and fake death, not easy to be found, mainly biting soybeans, corn and young orchards, dates The young leaves and young shoots of the tree are eaten into holes and nicks, which affect the growth of the plants.
The small gray weevil is overwintered by the adult in the soil. The soil is unearthed in the first half of May of the second year. Later, with the seedlings, the activity is high in the high temperature, dry, windless and sunny days. The low temperature, rainy, windy and cloudy activities are less. Generally, it is the peak of activity every day from 3 to 4 pm.
Governance method: Using the characteristics of gray elephant weevil, slow movement, and inability to fly, first lay plastic sheets under the tree, and collect and eliminate them after vibration. In the early stage of adult damage, spray 1500 times 4.5% beta-cypermethrin emulsifiable concentrate or 1000 times 50% phoxim emulsifiable concentrate or 2000 times 2.5% cyhalothrin emulsifiable concentrate. (bluegrass)
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