Studies On Occurrence And Control Technique Of The Major Pests On Rice In Fengtai Region

Based on the situation of pests aggravated on rice in Langxi county, The text investigated the occurrence of major pests of rice leaf roller, rice planthopper and stem borer systematically, and carried out field efficacy test of the three main types pests, then provide a scientific basis for the effective prevention and control of major pests of rice. The main contents include:1. Based on light trap and field surveys in2012, the rice leaf roller broken out lighter than mid-sized, the medium of, The forth (2) generation rice leaf roller broken out mid-sized, The fifth (3) generation broken out lighter than mid-sized, part of it broken out seriously, The sixth (4) generation broken out light. Planthoppers caused more serious damage allover the year, the forth (2) generation broken out lighter than mid-sized, the fifth (3) generation broken out in mid-sized, the sixth (4) generation serious occurrence, the seventh (5) generation broken out lighter than mid-sized. The stem borer broken out in mid-sized allover the year, part of it broken out seriously, the first generation broken out in mid-sized, The second generation broken out moderate to more serious, The third generation broken out in mid-sized.2. From the study of four pesticides on rice leaf roller in field, there was a preventive effect of480g/Lspinosad SC to rice leaf roller. Because of the spinosad SC is a biological insecticide, it is conducive to rice fields ecological, it is recommended that one of the pharmaceutical formulations to early rice leaf roller control in single cropping of rice field, the promotion and application of the recommended dose is6ml/667m2.3. According to the investigation after sprayed1day, There was a very significant difference between the three kinds amount in6g/667m2,9g/667m2,12g/667m2of the tested pesticides80%Pymetrozine· nitenpyram WG with the control insecticides to the control of planthopper, The investigation after sprayed5days showed that there was a very significant difference between supplied test fungicides with control insecticides, The control effects to planthopper were not obvious among all of the pesticide. The results showed that, within the scope of the test conditions and dosage, the80%of the Pymetrozine· nitenpyram WG had a better control effect to rice planthoppers, such as in the production for the control of rice planthoppers, and the the recommended dose is9g/667m2. The agent has no adverse effects on rice and the beneficial organisms in field,it is safe to use. 4. Several main pesticides had better control effect to stem borer, and the test dose was safe to rice. Consider the Fast-acting, durable effect, seedling protecting effect of insecticidal, the recommended dose is25ml/barrel of LL-003;10ml/barrel of ZN-001;10ml/barrel of LL-001.