桃小食心虫每年在我省果品产区发生较重,由于其危害时间长,难以控制,所以给果品生产造成严重危害。为此,1988—1990年我们连续利用生物农药Bt乳剂防治桃小食心虫,取得了理想的效果。用Bt乳剂400倍液喷雾,防治效果为96.2％,虫果率仅1.01％,而用灭扫利2000倍液喷雾,防治效果为70.8％,虫果率为19.6％,不喷药的虫果率平均为54％。实践证明:用Bt乳剂防治桃小食心虫,比用化学农药成本下降50％,同时对捕食蝽、草蛉、瓢虫等天敌有明显的保护作用。而且防治效果高,残效期长、对人畜无污染。但在使用过程中,必须切实注意以下几个问题。一、搞好预测预报。从5月15日开始,在果园内设置性诱剂诱测盆,每隔50米放置一个,最少不低于5盆。每日清晨详细检查并记录诱蛾量,以掌握桃小食心虫成虫的消长规律,为防治提供可靠依据。 Peach small bore worms occur in our province every year fruit producing areas heavier, because of its long-term harm, difficult to control, so to produce fruit serious harm. Therefore, from 1988 to 1990, we continuously used the biological pesticide Bt emulsion to control peach moth and achieved the desired results. With 400 times Bt emulsion spray, the control effect of 96.2%, fruit rate was only 1.01%, while the use of swell 2000 times spray, the control effect of 70.8%, fruiting rate was 19.6%, insects spray fruit The average rate was 54%. Practice has proved that: the use of Bt emulsion peach worm control than chemical pesticides costs decreased by 50%, while predators, buteo, ladybugs and other natural enemies have a significant protective effect. And prevention and control of high efficiency, long residual period, no pollution to humans and animals. However, in the course of using, we must pay attention to the following questions. First, improve forecasting. From the beginning of May 15, set in the orchard lure induction test basin, placed every 50 meters, at least not less than 5 pots. Detailed inspection and record the amount of trapping moth every morning to understand the growth and decline of adult peach moth worms to provide a reliable basis for the prevention and treatment.