白杨透翅蛾性引诱剂利用的研究

白杨透翅蛾Paranthrene tabaniformis Rott,是我国北方杨树主要蛀干害虫之一。据在北京市调查,每年苗木被害率可达70％,防治又较困难,采用40％氧化乐果1:800倍液喷洒,需喷6—8次,才能控制。1982—1984年采用白杨透翅蛾性引诱剂反3、顺13-十八碳二烯醇对成虫发生期进行监测,可准确地预测成虫发生期在北京地区5月上旬为成虫羽化初期,直至10月中旬结束,历期可长达5个月之久,并测到有第二代成虫的出现。性诱与化防相结合,不仅减少喷药次数,有利于改善环境和保护天敌,而且提高防治效果,每亩在不喷农药的情况下可挽回损失95元。诱芯采用200μg剂量即可,诱捕距离可达100—200米。在整个成虫羽化期不必更换诱芯。

SEXUAL LURE AS USED FOR CONTROL OF POPLAR CLEAR-WINGED MOTH (PARANTHRENE TABANIFORMIS)

Poplar clear-winged moth (Paranthrene iabaniformis) is one of the common wood borer in north part of China. Survey made in Beijing showed the infection rate may reach 70% in tree seedling nurseries. It is rather difficult to control this pest. Spray of 1 : 800 solution of 40% oxydi me thorate should repeat 6-8 times for effective control. From 1982 to 1984 for monitoring a sexual lure reagent for this specie (trans, cis) -3, 13 octadecadienol was used during the emerging stage. It is possible to predict, in Beijing district, that the initial stage of emergence is in first ten days of May, to the middle of December. This stage is prolonged for 5 months. Appearance of a second generation of adults was observed. A combination of sexual lure reagent and chemical control not only reduces the number of sprays but also improves the environmental conditions in protection of the natural enemies to this pest.The effect of control is also increased, in case of not spraying insecticides, a loss of 95 yuan may be avoided on each mou (0.066 hectare). 200ug of the reagent is used as trap carrier, the trapping distance is 100-200 meters. In the whole period of emergence, there is no need to change the trap carrier.