摘要
昆虫病原线虫防治麦田越冬稻象甲的室内研究陈俊炜，张哲涛，蒋金炜，王世明，郭玉杰，王念英（河南省郑州市植保植检站，郑州４５０００６；河南农业大学植物保护系，郑州４５０００２；中国农业科学院生物防治研究所，北京１０００８１）关键词：生物防治；稻象甲；微生...
Rice weevil, Echinonmus squameus, is becoming one of major rice insect pest in Yellow valley in Henan province due to the increase of rice cultivating area, new variety deposition as well cropping system changes. The diapause of the weevil occurs at matured larva stage in the rice stubble left in the following winter wheat field.Laboratory test showed that the entomopathogenic nematode, Steinemema feltiae Beijing, has a quite high pathogenicity on the over-wintered weevil larvae and resulted in 96. 7% of the mortality. The reinfection by the killed larva was evaluated and the mortality of re-infected larvae might reach 69 % and 83 % after 7 and 14 days, respectively. The killed larvae increased from 46. 8% to 86. 0% with rising the dosage of the nematodes from 100, 000/m2 to 150, 000/m2. The weevil larva density also significantly influenced the control effectiveness.A better control may be obtained using less nematodes at low larva density and more nematodes at higher larva density.
出处
《中国水稻科学》
CAS
CSCD
北大核心
1996年第2期125-127,共3页
Chinese Journal of Rice Science
关键词
生物防治
稻象甲
昆虫病原线虫
越冬
biological control
Echinonmus squameus
microbial pesticide
pathogenicity
Stainemema feltiae
