首页|期刊导航|中国农业科学（英文版）|Spatial and Temporal Distributions of the Fourth Generation Cotton Bollworm Eggs on Summer Corn Seeded at Different Times in North China
中国农业科学（英文版）2002，Vol.1Issue(1)：96-100,5.
Spatial and Temporal Distributions of the Fourth Generation Cotton Bollworm Eggs on Summer Corn Seeded at Different Times in North China
Spatial and Temporal Distributions of the Fourth Generation Cotton Bollworm Eggs on Summer Corn Seeded at Different Times in North China
摘要
Abstract
The spatial and temporal distributions of the cotton bollworm (Helicoverpa armigera Hübner) eggs on summer corn seeded at early-, middle- and late-times were studied in 1998 - 1999 in Hengshui, Hebei Province in North China. There were several egg peaks during the period from the middle to late August, which were coincided with the pollen-shedding or blister stage of summer corn depending on the change of bollworm occurrence. The eggs were mainly deposited on silks of ears, and leaves and sheaths above the ears.The number of eggs laid on middle- and late-seeded summer corn were higher than that on the early-planted one, resulting in more heavy damage the on late-seeded corn.关键词
Helicoverpa armigera/Egg/Spatial and temporal distribution/CornKey words
Helicoverpa armigera/Egg/Spatial and temporal distribution/Corn引用本文复制引用
WANG Zhen-ying,HE Kang-lai,WEN Li-ping,ZHANG Guang-yi,ZHENG Li..Spatial and Temporal Distributions of the Fourth Generation Cotton Bollworm Eggs on Summer Corn Seeded at Different Times in North China[J].中国农业科学（英文版）,2002,1(1):96-100,5.基金项目
We thank Dr. Zhao Jian-zhou, Department of Entomology, Cornell University, for his review of the English manuscript. This work was part of the IPM Research of main diseases and pest insects of corn, National Project No. 96-005-01-03, supported by the Mini （）
