中粳稻区白背飞虱灾变规律及配套控制技术研究  

The Disaster Regularity and Controlling Technique of Sogatella Furcifera(Hor vath)in Intermediate Japonica Rice Region

作　　者：张夕林[1] 张谷丰[1] 孙雪梅[1] 罗萝[1] 丁晓丽[1] 

机构地区：[1]江苏省通州市植保站,江苏通州市226300

出　　处：《农药科学与管理》2002年第4期26-28,34,共4页Pesticide Science and Administration

摘　　要：白背飞虱在中粳稻区具有成虫迁入早,迁入量大,增殖倍数高,迁入下代即猖獗危害等特点。白背飞虱暴发时,二代若虫高峰期虫量,与一代7月10～15日田间虫量极显著正相关。据此建立了预测式,提出了发生程度预测指标,预报准确率达85%以上。研究表明,水稻不同生育期,不同虫口密度的白背飞虱的增长速度不一样;同一生育期,低密度的增殖速度要大于高密度,但总虫量高密度处理显著高于低密度区。二代白背飞虱百穴虫量与水稻产量损失呈极显著正相关;防治指标为180～190头。因此,当二代白背飞虱发生早或超过180头以上时,应采取“治二压三”的防治策略,须用药防治。同时还形成了与之配套的,而且行之有效的水稻中后期多种害虫总体防治控制技术。Sogatella furcifera(Horvath)had disaster characteristics such as great number of ingoing adult,more times of reproduction,in intermediate keng rice region in north of Jiangsu province.The immigrating generation is the main damage source.The maximum number of the second generation is significant positive correlative to the number of the first generation that occured before10th to15th,July.Based on the data,a forecast for-mula was established and the forecast index of occuring level was suggested.The forecast accuracy was close to85%.The results showed that the increase of the population dif-fered among the treatment with various levels of initial infestation.Higher reproductive potential was observed in the treatments with lower levels of infestation though the density was eventually greater in the plots infested at higher densities.The yield loss was signifi-cantly correlated to the population density.The economic threshold was thus estimated to be180～190planthoppers per100hills.This suggests that the spray is needed when the second generation population infest the crop earlier or exceed180.Effective technique for the control of pest in intermediate keng rice in late period are also developed.

关 键 词：中粳稻区 白背飞虱 灾变规律 配套控制技术 

分 类 号：S435.112[农业科学—农业昆虫与害虫防治]