期刊论文

中文

昆虫学报

0454-6296

2015

58

1

45-52

10.16380/j.kcxb.2015.01.006

国家自然科学基金项目(31200321) 国家科技支撑计划课题(2012BAD19B05)

本校为第一机构

【目的】针对由Bt棉花和玉米构成的华北农田景观,探讨不同寄主作物对棉铃虫Helicoverpa armigera越冬抗寒的影响。【方法】2013年在河北廊坊科研中试基地的作物田中将棉铃虫幼虫接到Bt棉和玉米上,比较取食不同作物后棉铃虫的化蛹率、存活率和越冬蛹羽化率;在室内控制条件下分别用棉蕾和鲜玉米粒饲喂棉铃虫幼虫。测定滞育蛹和非滞育蛹的鲜重、干重、以及脂肪、糖原和低分子物质含量等指标,比较取食不同作物后棉铃虫的抗寒能力。【结果】取食玉米的棉铃虫滞育蛹干重(117.5 mg)、脂肪含量(457. 2 μg/mg DW)以及海藻糖浓度(86. 45 μg/ g)均显著高于取食Bt棉的棉铃虫滞育蛹干重(56.6 mg)、脂肪含量...

【Aim】From the perspective of the farmland landscape in north China composed of Bt cotton and corn,the research aims to explore the influence of different hosts on hardiness of the overwintering generation of Helicoverpa armigera. 【Methods】H. armigera larvae were inoculated on Bt cotton and corn in the field of scientific base in Langfang,Heibei,2013. During this period,the pupation rate,diapause rate and emergence rate of overwintering pupae of H. armigera feeding on different types of crops were detected and compared. Indoors,H. armigera l...