Rice planthopper is a rice pest that has been continuously and severely erupted in recent years. With the expansion of hybrid rice area and the migration of rice planthoppers, the prevention and treatment needs to adopt the strategy of controlling the first generation and controlling the second generation, treating the field, protecting Datian, and pre-treatment. , the late period of protection. Pre-emergence treatment of insects to protect seedlings, to reduce the number of insects, and to prevent and control the early stage of damage.
Agricultural control measures: rationally arrange crop layout, pay close attention to field management, eliminate wintering insect sources, properly plant and plant early seasons, avoid the peak period of rice planthoppers, and timely plowing and drying rice after harvesting: breeding insects Variety, reasonable close planting, standardized cultivation. The field microclimate can be improved by means of dry and thin planting, throwing cockroaches, direct water, etc., so that the rice can be tillered early, and the rice tiller is finished before the peak of the rice planthopper mixed, which can reduce the damage: simultaneously control the nitrogen fertilizer, increase the application of phosphate fertilizer, silicon calcium Fertilizer, skillful application of topdressing, so that rice early fast, quick tillering, increase the hardness of the plant to avoid the tenderness of rice planthopper and reduce its damage: through reasonable irrigation, so that shallow water planting, water, live, seedlings Enough field, deep water booting, and moist grouting, promote the growth of rice plants and enhance stress resistance.
Biological control measures: regulate the small ecological environment around the paddy field. Spreading on the field can induce beneficial weeds of the natural enemies of rice planthoppers, increase the number of natural enemies, and fully exert the control effect of natural enemies on rice planthoppers.
Chemical control measures: When sowing, the rice is mixed with 5% Regent suspension and water to prevent the occurrence of rice planthopper. Datian prevention and control, strengthen the forecasting and field survey during the tillering stage of rice, and monitor the occurrence of rice planthoppers. In the period of the young nymphs of the main damage generation, 1% of the insecticide (avermectin) suspension agent (40-50) Millet/mu spray control, when the amount of insects in the field reached 1000, the insects began to use imidacloprid, Aketai, Emerald, Kuweiwei and other agents for spray control. For example, 10% imidacloprid wettable powder 20 g/mu can be sprayed with 37.5 kg of water. When applying the medicine, it is necessary to prevent the joint defense. If necessary, the motivational defense team should carry out large-scale prevention and control, reduce the source of insects from , reduce the frequency of application, and improve the control effect.
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