Effects of <em>Conogethes punctiferalis</em> (Lepidopteran: Crambidae) infestation on the occurrence of Fusarium ear rot and the yield loss of spring corn
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ACTA ENTOMOLOGICA SINICA  2017, Vol. 60 Issue (5): 576-581    DOI: 10.16380/j.kcxb.2017.05.010
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 Effects of Conogethes punctiferalis (Lepidopteran: Crambidae) infestation on the occurrence of Fusarium ear rot and the yield loss of spring corn
LIU Yue1,2,#, LI Rong-Rong2,#, HE Kang-Lai2, BAI Shu-Xiong2, ZHANG Tian-Tao2, CONG Bin1, WANG Zhen-Ying2,*
(1. College of Plant Protection, Shenyang Agricultural University, Shenyang 110161, China; 2. State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China)
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Abstract 【Aim】 The yellow peach moth, Conogethes punctiferalis (Guenée), has become the major insect pest of corn in Huang-Huai-Hai Region. This study aims to clarify the relationship between the occurrence of C. punctiferalis and the severity of corn ear rot, and the effect of ear infestation by C. punctiferalis on corn yield loss. 【Methods】 The corn ears were inoculated with neonate larvae of C. punctiferalis and Fusarium verticillioides singly or complexly at the silking, blister and milk stages of corn ears, respectively, and then the damage degree of C. punctiferalis, the occurrence rate of ear rot, the disease index and the corn yield were investigated. 【Results】 For different inoculated developmental stages of corn ears, the disease index by the complex inoculation with C. punctiferalis larvae and F. verticillioides was the highest, followed by the single inoculation with C. punctiferalis larvae, and then by the single inoculation with F. verticillioides. When the corn ears were inoculated with C. punctiferalis larvae at the silking stage of corn ears, the occurrence of the corn ear rot and the borer damage was the most serious. The corn yield components were affected when the corn ears were complexly inoculated with both C. punctiferalis larvae and F. verticillioides, with the highest yield loss per ear (33.09%) at the silking stage and 22.50% and 10.13% yield loss per ear at the blister and milk stages, respectively. 【Conclusion】 The yellow peach moth infestation during the developmental stage of corn ears significantly aggravates the occurrence of corn ear rot and causes heavier yield loss of corn.
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LIU Yue
LI Rong-Rong
HE Kang-Lai
BAI Shu-Xiong
ZHANG Tian-Tao
CONG Bin
WANG Zhen-Ying
Key wordsConogethes punctiferalis   Fusarium ear rot   Fusarium verticillioides   incidence   yield loss     
Cite this article:   
LIU Yue,LI Rong-Rong,HE Kang-Lai et al.  Effects of Conogethes punctiferalis (Lepidopteran: Crambidae) infestation on the occurrence of Fusarium ear rot and the yield loss of spring corn[J]. ACTA ENTOMOLOGICA SINICA, 2017, 60(5): 576-581.
URL:  
http://www.insect.org.cn/EN/10.16380/j.kcxb.2017.05.010      or     http://www.insect.org.cn/EN/Y2017/V60/I5/576
 
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