② Agricultural control. Implement paddy-upland rotation; Irrigation in time during corn growth; Do not apply immature organic fertilizer; Intensive cultivation, timely soil suppression, field weeding; Plow the land in a large area in the spring and autumn, and pick insects with plows. In severe areas, overwintering larvae can be turned over in autumn and winter to dry, freeze to death or be preyed by natural enemies, and the control effect of mechanical killing is obvious; At the same time, it is necessary to prevent the use of immature organic fertilizer to prevent adults from laying eggs.
③ Treating the soil with chemicals. 200-250g of 50% phoxim EC per mu, 65,438+00 times of water, sprayed on 25-30kg of fine soil, evenly mixed to make toxic soil, applied along the ridge, and then shallowly hoed, or taken out from the seed ditch or ground, ploughed or mixed with manure for application; Mixing 25-30 kilograms of fine soil with 2-3 kilograms of 2% methyl isofenphos powder per mu to prepare toxic soil; The soil is treated with 3% methyl isofenphos granules, 3% Weibutan granules, 5% phoxim granules or 5% diazo granules at a ratio of 2.5-3 kg per mu.
④ Chemical seed dressing. Seed dressing with 50% phoxim, 50% parathion or 20% isocarbophos, water and seeds according to the ratio of1:30: 400-500; Other underground pests can also be treated by coating with 25% phoxim capsules or 25% parathion capsules or 35% carbofuran seed coating agent with 2% of the seed weight.
⑤ Poison bait trapping and killing. 5 kg of 25% parathion or phoxim capsules 150 ~ 200 g mixed with poisonous bait such as millet, or 3 ~ 4 kg of 50% parathion and 50% phoxim EC mixed with poisonous bait, can also get good control effect when sprinkled in seed ditch.
⑥ Physical methods. In conditional areas, black lights can be set to trap and kill adults, so as to reduce the number of grubs.
⑦ Biological control. Use brown insect-eating flies, scarab black bees, Beauveria bassiana, etc.