The scientific name Spilosoma urticae (Esper) belongs to the order Lepidoptera, Lamperiaceae. Synonyms Bombyz urticae Esp. Distributed in Heilongjiang, Hebei, Liaoning, Shandong, Jiangsu, Zhejiang. In recent years, Shandong, Hebei, and Liaoning have experienced heavy weight. Near the vein, each female produces 80-410 eggs, the egg period is about 5 days, the larval period is about 30 days, and there are 6 instars. In the middle and late August, the last-instar larvae spit in the soil and bind the soil particles to make up the earthworms. Wintering. The worms are wet and dry. In July, the temperature is low and the humidity is high.
Control methods (1) The larvae are large and inactive, and can be manually captured. (2) If necessary, spray 1.5% methyl parathion powder, 2kg per 667m2, or spray 2.5% of deltamethrin buttermilk oil 20-30ml, 100L of water. The use of drugs can no longer be increased so as to avoid phytotoxicity.
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