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Preliminary report on the occurrence of Athetis lepigone in Shandong Province in 2012

Wang Jing;Zhao Nan;Yu Yi;Zhang Ansheng;Men Xingyuan;Zhou Xianhong;Zhuang Qianying;Wang Zhenying;Shi Jie;Li Lili;Key Laboratory for Plant Virology of Shandong,Institute of Plant Protection,Shandong Academy of Agricultural Sciences;College of Plant Protection,Shandong Agricultural University;State Key Laboratory for Biology of Plant Diseases and Insect Pests,Institute of Plant Protection,Chinese Academy of Agricultural Sciences;Institute of Plant Protection,Hebei Academy of Agricultural and Forestry Sciences;  
Occurrence of Athetis lepigone Mschler in corn fields and soybean fields were investigated in 17 cities of Shandong Province in summer of 2012.The results showed that the pest spread all over Shandong Province. The pest occurred most seriously in Yantai with average density of 3.27larva per square meter,followed by Weifang,Linyi,Laiwu and Liaocheng,with the average density of 1.87,1.77,1.74 and 1.62 larva per square meter,respectively.The maximum density was 16larvae per square meter.The 3rd and4th instar larva of A.lepigone has a large occurrence amount in middle to late July.The larva prefers to hiding in humid surface soil covered by the wheat straw,peanut seedlings and withered grass.
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