论文部分内容阅读
采用田间虫情和天敌数量调查、水稻产量与千粒重测定和水稻生产实际收益比较的方法 ,在浙江富阳和重庆秀山两地进行了种植抗虫品种和减量使用杀虫剂的白背飞虱可持续治理技术的田间试验。设使用杀虫剂 2次和农户管理 (使用杀虫剂 4～ 5次 )两个处理 ,无杀虫剂作为对照。试验结果表明 ,抗虫品种嘉花 1号在各种杀虫剂处理中 ,白背飞虱成、若虫数量最低 (0 9～ 3 3只 /株 ) ,是感虫品种中香 1号无杀虫剂处理的 0 12 %。无杀虫剂处理的蜘蛛数量分别是农户管理和杀虫剂 2次处理的 2 8～ 5 5倍和 1 6～ 4 1倍。在同样的杀虫剂处理条件下 ,抗虫和耐虫品种的稻谷损失量和损失率较感虫品种明显地低。水稻生产的实际收益比较显示 ,无杀虫剂处理 ,种植嘉花 1号可以增收 1 13%～ 15 91%。因此 ,稻农种植抗虫或耐虫品种 ,减量使用杀虫剂至 2次或不使用杀虫剂 ,充分利用蜘蛛等天敌的控制作用 ,完全能够有效地抑制白背飞虱种群的发生和发展 ,获得与常规杀虫剂用量 (4～ 5次 )相仿或更高的收益。
Based on the investigation of the number of insect pests and natural enemies in the field, the comparison between rice yield and 1000-grain weight and the actual yield of rice production, the white-backed planthoppers that were planted with insect-resistant varieties and pesticides were reduced in Fuyang, Zhejiang and Xiushan, Chongqing Field trials of continuous management techniques. Two pesticides were set up and pest management (using pesticides 4 ~ 5 times) two treatments, no pesticides as a control. The results showed that the insect-resistant variety Jiahua 1 had the lowest number of whitebacked planthopper (Nilaparvata lugens) and nymphs (0 9 ~ 3 3 per plant) in the treatment of various insecticides, Insect treatment of 0 12%. The number of insecticide-free spiders was 28-55 times and 16-4 times higher than that of pest management and pesticide treatment respectively. Under the same pesticide treatment conditions, the loss and loss rate of rice in insect-resistant and insect-resistant varieties was significantly lower than that in susceptible varieties. The actual benefit of rice production shows that without pesticide treatment, planting Jiahua 1 can increase income by 13 13% to 15 91%. Therefore, the rice farmers planting insect-resistant or insect-resistant varieties, reducing the use of pesticides to two times or without pesticides, take full advantage of spiders and other natural enemies of the control effect, can completely inhibit the occurrence of white -backed planthopper populations and Developments that earn similar or higher benefits than regular insecticide use (4 to 5 times).