论文部分内容阅读
试验证明:灭幼脲三号及灭多混剂(灭幼脲三号十多来宝、DT)均能通过米蛾卵壳渗入卵液、对松毛虫赤眼蜂(Trichogramma dendrolimi)发育略有影响,但幼虫尚能发育至蛹期。灭多混剂比灭幼脲三号对赤眼蜂的毒性大、两种药剂的LC_(50)分别是493.73和630.48ppm,均大于林间使用浓度,对寄生于松毛虫卵中的不同发育期赤眼蜂均很安全、对蜂羽化没有影响。在人工卵中,灭幼脲三号浓度达到320ppm时,低龄幼虫尚能生育至老熟幼虫,但浓度为20ppm时,对幼虫化蛹及蛹羽化为成蜂抑制作用较明显,只有19.36％的幼虫能化蛹,当浓度为5ppm时、仅11.91％的蛹能羽化出蜂。
Tests show that: the results showed that all the three compounds of diflubenzuron and exterminate (diflubenzuron no more than ten to Po, DT) infiltrated the ovum through the eggshell of M. moth, and developed slightly to Trichogramma dendrolimi Affect, but the larvae can still develop to pupal stage. The results showed that the LC_ (50) of the two pesticides were 493.73 and 630.48ppm, respectively, which were greater than the concentrations used in the forest. Trichogramma during development are very safe, has no effect on the emergence of bee. In artificial eggs, juvenile larvae could still fertile to mature larvae when the concentration of diflubenzuron III reached 320ppm. However, when the concentration was 20ppm, the inhibitory effect on pupae and pupal eclosion of adult larvae was obvious, only 19.36% Larvae can pupate, when the concentration of 5ppm, only 11.91% of pupae can emerge bees.