再生稻白背飞虱为害损失测定和防治指标的研究

在福建,白背飞虱是再生稻的重要害虫。文中进行了再生稻白背飞虱为害损失的测定。根据虫量和产量损失的关系,结合现行稻谷价格、产量水平、防治费用等因素,确定允许为害损失率,同时建立了防治指标模型。按照防治指标模型,制定出不同产量水平的防治指标。

STUDY ON THE DAMAGE AND ACTION THRESHOLD OF WHITE-BACKED PLANTHOPPER TO RATOONING RICE

Field experiments with caging and inoculation methods were carried out to test the damage of white-backed planthopper (WBPH) Sogatella furcifera (Horvath) to ratoon-ing rice, the main insect pest on this crop in Fujian Province. Based on the relationship between the density of WBPH and yield loss of rice, the price ar,d yield level of rice and cost of control, etc. , an action threshold model, in consideration of the tolerable yield loss, was developed. The tolerable yield losses and action thresholds in different yield level fields were determined by this model.