Researches And Application On Green Control Technique System Of Primary Pests In Chaohu Region

In recent years, the rice leaf roller, stem borer, brown planthopper and other Pests continuously had broken out in Chaohu City rice producing areas, which have resulted in the reduction of rice, medication is not standardized, ecological imbalance, and serious economic losses. In order to restrain the loss, the green control technique system on the primary pests had been investigated and extended. The main contents include:1. To carry out the work of releasing the Trichogramma japonicum to control the rice leaf roller and stem borer in paddy. The results showed that there had some control to the damage first generation stem borer when releasing Australian minute egg parasite in overwintering stem borer initial peak; The investigation findings of damage stability from the second generation of and4(2),5(3) rice leaf roller showed that the control effect of T. japonicum in the second generation of rice stem borer is low, and ineffective to4(2),5(3) rice stem borer.2. Use the production insect sex pheromone (stem borer lure) from Zhejiang Newcom Biotechnology Company. A-type and B-type (different compositions) conducted a field comparison experiment, the results showed that:induced B core single basin accumulated lure moths491,3.78times the lure core of A-type and B-type lure core lure moth effect is extremely significant better than the A-type lure.3. To carry out a field efficacy trials of efficiency and low toxicity pesticides between10%Ethofenprox suspension and25%Pymetrozine WP. The rapidly available of10%ether pyrethroid suspension60,80mL per667m2or25%Pymetrozine WP20g/667m2controlling planthopper was poor, but the durable effect of10%ether pyrethroid suspension60,80mL per667m2was poorer than25%Pymetrozine WP20g/667m2. Spiders were decrease of42.5%in one day after use the10%Ethofenprox suspension80mL/667m2to control planthopper, but three days later restored. It did not work to the cyrtorhinus lividipennis. And60mL/667m2of10%Ethofenprox suspension had no effect on spiders and cyrtorhinus lividipennis; Use10%Ethofenprox SC to control planthopper, both60mL/mu and80mL/667m2were safe to natural enemies in rice fields, but the effect to planthoppers was not significant, both rapidly available and durable effect were lower than25%wettable Pymetrozine WP;25%Pymetrozine WP had a high control effect and better effectiveness of rice brown planthopper, the recommended dose is20g/667m2.