桃小食心虫危害长枣果实,其幼虫在果内绕核串食,一般虫果率达30％以上,造成大量落果,严重地影响产量,降低经济价值。1990年,我们在灌阳县文市镇、新圩乡和红旗乡的枣园,用90％敌百虫1000倍液进行防治试验,7月15—16日和7月25—28日,先后喷药两次,8月10日调查防治效果,采收时测产。施药区平均落果率为1.53％,不施药区落果率为33.71％。施药区平均增产32.9％。 Peach beetle endangers long jujube fruit, the larvae in the fruit around the core string food, the general rate of fruit and insect pests reached 30% or more, resulting in a large number of fruit drop, seriously affecting the yield and reduce economic value. In 1990, we held prevention and control trials with 1000 times of 90% trichlorfon in Zaoyuan Township, Guwen Township, Xinwei Township and Hongqi Township, Guanyang County. From July 15 to July 15 and July 25 to 28, Spraying twice, August 10 to investigate the control effect, harvesting measured production. The average fruit drop rate was 1.53% in the application zone and 33.71% in the non-application zone. The application area average yield 32.9%.