单季稻病虫关键节点防控应用技术研究与示范

为了进一步验证单季稻病虫全程综合解决方案,开展了单季稻病虫关键节点防控技术研究。根据当地病虫监测并结合本试验田间实际,通过各处理间调查数据统计分析,在水稻关键节点(分蘖末期、破口前5天),每公顷用"40%氯虫·噻虫嗪WG 150 g+50%吡蚜酮WG 225 g+32.5%苯甲·嘧菌酯SC450 m L"组合药剂防治2次,药后35天:对稻飞虱和纹枯病防效高达94.3%和99.0%、稻纵卷叶螟保叶效果为95.6%,持效期长,安全性好;同时田间表现为水稻茎秆青秀、基部黄叶很少、茎秆弹性好。因此,在水稻关键节点用药能显著提高水稻主要经济性状,有效控制水稻主要病虫的危害,特别是对易遭受台风袭击的沿海地区有很好的推广应用前景。

Application Technology Research and Demonstration of Diseases and Pests Control at Key Nodes on Single Cropping Rice

In order to verify synthetic solution scheme of diseases and pests on single cropping rice, application technology of diseases and pests control at key nodes was researched based on data from forecast and control of local rice diseases. The result showed that, when the compound pesticide of 40% chlorantraniliprole-thiamethoxam WG (150 g/hm²) 50% pymetrozine WG (225 g/hm²) 32.5% difenoconazole-azoxystrobin SC (450 mL/hm²) was applied at rice key nodes (the late tillering stage and 5 d before rupture stage), the rice planthopper, sheath blight and Cnaphalocrocis medinalis preventing efficiency at 35 d after the second spray reached to 94.3%, 99.0% and 95.6%, respectively. More importantly, the compound pesticide had long residual activity and excellent safety. Rice stem stayed green, elastic and had few yellow leaves at stem base. Therefore, spraying pesticides at key nodes was able to enhance main economic characters remarkably and to control main diseases and pests effectively on single cropping rice. The synthetic solution scheme had good popularization and application prospect in coastal?areas, which suffered typhoon easily.