摘要
利用与人工饲料相混合的方法,比较了不同剂量的烟曲霉素B对亚洲玉米螟微孢子虫病的控制效果。结果表明,烟曲霉素B 453、565和683μg/g的剂量处理都显著降低了亚洲玉米螟微孢子虫病的感染率和感染强度。食药1代时,幼虫和成虫感染率分别比对照平均减少44.4％～61.1％和41.7％～50％,其感染强度都由原来的严重感染分别下降为轻度感染。幼虫存活率、化蛹率、成虫繁殖力也均显著高于对照。连续处理3代饲喂烟曲霉素B对玉米螟生长发育没有不利影响,对微孢子虫病的控制作用随处理世代数的增加亦有增加的趋势。不同剂量的烟曲霉素B处理间的防效差异不显著,453μg/g可作为亚洲玉米螟大量饲养中控制微孢子虫病的推荐剂量。
The control efficacies of different dosages of Fumidil B, one of the aspergillic agent capable to suppress microbes, mixed in artificial diet of Asian corn borer Ostrinia jurnacalis (Guenee) against microsporidiosis infected by Nosema furnacalis were compared. The results showed that all the Fumidil B treatments, 453, 565 and 683μg/g in artificial diet, has significantly decreased the infection rates and intensities of the microsporidian. The infection rates of larvae and adults in first generation after treatments were 44.4% -61.1% and 41.7% -50.0% decreased, respectively, in comparison with those of the check (without Fumidil B treatment), and their infection intensities were decreased from level 4 and 3.6 (high infection) to less than level 1 (light infection) . In all the treatments, the larval survivals, pupation rates and adult fecundities were obviously higher than those of the check. There were no unfavorable affections on the growth and development of corn borer after Fumidil B treatment for three generations. The control effect on microsporidiosis was increased with the generation number treated with Fumidil B. Owing to that there were no significant differences among the three dosage treatments, 453μg/g, the lowest dosage in this study, was determined as the recommended dosage to keep microsporidiosis under control during mass rearing of larval O. furnacalis.
出处
《植物保护学报》
CAS
CSCD
北大核心
2003年第1期13-18,共6页
Journal of Plant Protection
基金
国家"九五"科技攻关项目(95-005-01-03-02)
