Grasp the prevention and control of rice planthoppers in middle rice field and Datian field

Southern rice black-streaked dwarf disease is a virulent viral disease caused by the migration of whitebacked planthoppers, which is characterized by abruptness, fulminantness, rapid spread and concealment. From May to June, our county entered the rainy season. White-backed planthoppers will move into the paddy fields and interplant Honda early with strong convective currents. The proliferation speed is rapid. If we do not pay attention to prevention and control, it will have a serious impact on rice growth and yield. Therefore, all towns and townships should be highly vigilant, effectively move the monitoring and prevention and control work forward, strengthen the monitoring of insect populations of the white-flying sting bugs of the virus-mediated mediators, and ensure the prevention and control of mid-season rice fields and early-stage rice planthoppers to prevent the southern black For the occurrence of dwarf disease, we must adopt the prevention and control strategy of "preventing pests and diseases, treating Suda Tianda and protecting Datian, and pre-institutional protection."

1. Chemical control of Putian period: A “sweet” was applied before the transplanting of the seedlings. The seedlings that had not been treated with seed dressing were sprayed once from the leaves of the seedlings to the clover and before the transplanting. The weeds in the surrounding fields were also At the same time spraying; pharmaceutical optional 25% pymetrozine wet powder 16 ~ 20 grams / acre, or 25% buprofezin wettable powder 30 ~ 40 grams / acre.

2. Control of pesticides during the delivery period: When transplanting, care should be taken to eliminate dwarf disease. After transplanting into the field, according to the population of whitebacked planthoppers, timely spraying of quick-acting and persistent insecticides, etc., to suppress the white-tailed planthoppers. The number of insect populations reduces the risk of disease epidemics. The agent can choose 25% buprofezin WP, 30-40g/mu, or 25% pymetrozine wet powder 16-20g/mu, or 25% thiazide isopropyl WP 150g/mu. Or 80% cinnamizin water dispersible granules 10 g/mu, watered 45 to 60 kg uniform spray.

3, timely removal of diseased plants: In the 20 days after the rice is planted, the incidence of more than 3% of the incidence of field plots, timely removal of diseased plants (Plexus), stepped into the mud, and then take out half or reserve Fill seedlings, strengthen fertilizer and water management, promote early-onset fate, and ensure effective delivery.

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