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Five methods for winter crop pest control
The pests of crops are in their weaker stages during the wintering period in their life cycle, which is a good time for prevention and control. At this time, the pests are less mobile and do not even feed and are in hibernation. Therefore, we must seize key prevention and control measures, effectively reduce the occurrence of the leap year, and have a multiplier effect. I. Morphology and site of overwintering pests in main crops Rice: Rice is grown in three-generation, second-instar, second-generation, and third-fourth-generation larvae or old-old mature larvae in rice piles or rice straw; Adults are wintering on grasses such as Mainia and Barley. Cotton: Aphis gossypium with fertilized eggs in buds or branches of hibiscus, pomegranate, prickly ash, prunella, etc.; winter spiders use female adults to overwinter in dead leaves, weeds, and gaps in nearby soil or green manure crops; The ovipositor is wintering in the pith of broad beans, humus, locusts, grasses, and artemisia, and in the pith of cotton stalks; the winter bollworm is pupa in the soil; the red bollworm is mature larvae. Winter in cotton warehouses, drying tools, cottonseeds and bells. Miscellaneous grains: corn borer is wintering with mature larvae in corn, sorghum stalks and cobs, and cotton husks, etc.; pods are overwintering with mature larvae in soil; winter larvae and larvae live over winter; With nymphs and adults overwintering in deep layers of soil, eggs are produced in fluvo-aquicides near rivers and canals. II. Prevention and control of overwintering pests 1. The dry and dry cropland should adopt paddy-upland rotation for heavier land pests such as earthworms, helminth beetles and earthworms. After 3 to 4 years of rotation, its effect on controlling underground pests is very high. Significant. 2. Ploughing and disinfestation Soil pests such as earthworms and earthworms are used to timely plow the soil during the wintering season and dismantle the insects' nests. Pests that have been turned to the ground should be manually picked up or allowed to freeze. Parasite pests on surface host plants should be buried deep in the soil. 3. Centralized treatment should make full use of the basic construction of farmland water conservancy in spring and winter, eradicate weeds in ditches, roads, canals and canopies, collect crop straws and debris, and burn rice dumplings in rice or wheat fields, or put them in piles. As fertilizer. 4. Pharmaceutical treatment: The seed treatment is performed on the wetland wheat before sowing, diluted with 50% phoxim EC 0.5 kg water and 25 kg water, mixed with 250 kg to 500 kg of wheat seed, and used for winter and leisure fields or intercropping With 3% phoxim granules per acre, 2 kg evenly mixed fine soil 15 kg, after spreading, combined with winter turning soil, there are more than 95% of the insecticidal effect. 5, trapping and killing pests in the late winter and early spring, when the temperature and humidity suitable for winter pest activity, the use of pests phototaxis, odor, chemotaxis and other characteristics to kill pests. If it is diluted with 90% crystals of trichlorfon 0.5 kg, stir into the fragrant cotton kernel cake or bean cake or wheat bran 30 kg ~ 40 kg made bait, spread in the field in the evening, 4 kg ~ 5 baits per acre Kilograms have a good trapping effect on crickets and other pests. China Agricultural Network Editor