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作者进行了50多种抗生素对棉铃虫的毒力测定和有关作用方式的探讨。结果表明,在触杀和胃毒试验中,仅Avermectin的系列显示出明显的毒力效果,其中B_1组分效果尤为突出。触杀和胃毒作用两方面相比,72h的胃毒LC_(50)为432mg/L/g幼虫,比触杀LC_(50)(3782mg/L/g幼虫)约高9倍。但速效性较差,持效性较好。在生长抑制试验中,仅Allosamidin表现出明显的生长抑制效果。处理后的第6天,40mg/L处理的幼虫体重(38.06mg/头)只相当于CK(279.40mg/头)的1/7;体长(19.7mm/头)只相当于CK(25.4mm/头)的77.5％;化蛹率仅为7.2％,而CK为93.1％。在驱避试验中没有任何抗生素显示出较好的效果。
The authors carried out more than 50 kinds of antibiotics on the determination of the toxicity of the cotton bollworm and the discussion of the mode of action. The results showed that the series of Avermectin showed obvious virulence effect in the contact and stomach poisoning tests, of which the B_1 component was especially effective. Compared with gastric toxicity, LC 50 of stomach toxicity at 72h was about 9 times higher than that of LC 50 at 37 mg / L / g. But less effective, effective and better. In the growth inhibition test, only Allosamidin showed a significant growth inhibitory effect. Body weight (38.06 mg / head) at 40 mg / L was only 1/7 that of CK (279.40 mg / head) on day 6 after treatment; body length (19.7 mm / head) was only equivalent to CK / Head) of 77.5%; pupation rate was only 7.2%, while CK was 93.1%. No antibiotics in the repellent test showed good results.