用性信息素诱捕法大面积防治梨小食心虫的田间试验

1981至1982年,在辽宁省绥申县白梨产区用合成梨小食心虫性信息素诱捕法进行了大面积防治梨小食心虫Grapholitha molesta(Busck)的田间试验。防治面积分别为4,000公顷和5,400公顷。平均每公顷设15个性信息素诱捕器。化学防治区每年8—9月份喷两次农药,诱捕区不喷这两次农药。诱捕区梨小食心虫雌蛾的交配率比化防区下降74.2—82.9%;梨小卵的寄生率提高79.2%;梨小虫果率下降50.3—72.8%。

FIELD TRIALS ON MASS TRAPPING FOR THE CONTROL OF THE ORIENTAL FRUIT MOTH WITH SYNTHETIC SEX PHEROMONE

Sex pheromone mass trapping trials for the control of the oriental fruit moth, Grapholitha molesta Busck, were conducted in pear orchards of Suizhong County of Liaoning Province from 1981-1982. The mass-trapped areas were about 4,000 and 5,400 hectares in 1981 and 1982, respectively. Fifteen traps per hectare with the synthetic sex pheromone of the oriental fruit moth were used in the field trials. In the chemical control areas, two insecticidal treatments were applied to control the oriental fruit moth in August and September, while no insecticide was used in the mass-trapped areas.Rates of the female mating in the mass-trapped areas were 74.2-82.9% lower than that in the chemical control areas. Rate of the eggs parasitized in the mass-trapped areas was 79.2% higher than that in the chemical control areas. Rates of the fruit damage in the mass-trapped areas were 50.3-72.8% lower than that in the chemical control areas.