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Issue:ISSN 2095-1353
           CN 11-6020/Q
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Your Position :Home->Past Journals Catalog->2015年52 No.1

Overwintering characteristics of the Asian corn borer, striniafurnacalis (Guenée) (Lepidoptera: Crambidae) and predictionof the period of occurrence of overwintering generation adults
Author of the article:LI Jing-Wen** ZHANG An-Sheng ZHANG Si-Cong LI Li-Li*** YU Yi*** MEN Xing-Yuan ZHOU Xian-Hong Z
Author's Workplace:Key Laboratory for Plant Virology of Shandong, Institute of Plant Protection, Shandong Academy of Agricultural Sciences, Jinan 250100, China
Key Words:Ostrinia furnacalis, overwintering larvae, survival rate, forecasting
Abstract:

  [Objectives]  The Asian corn borer Ostrinia furnacalis (Guenée)(Lepidoptera: Crambidae) is an important insect pest of corn in China. Studies of its overwintering characteristics and prediction of the occurrence period of overwintering generation adults are important for improving the control efficiency of this pest. [Methods]  The number of overwintering Asian corn borer larvae and the distribution in corn plants were investigated by splitting the stalks and cobs of corn in spring 2007 in Dongchangfu, Qufu, Shanghe, Binchengqu, Jimo and Qixia, Shandong province. Overwintering larvae were placed outdoors to observe pupation. Dates of pupation and survival rates were recorded. [Results]  The average number of overwintering larvae in corn stalks and cobs was 41.80 and 19.91 per hundred stalks or cobs, respectively, with larvae in stalks accounting for 67.30% of the total. The ratios of overwintering larvae on the upper, middle and lower parts of corn stalks were 21.18%, 38.80% and 40.02%, respectively. The initial peak, peak, and end peak stage of overwintering generation pupation occurred on May 27, June 5 and June 21, and the initial peak, peak, and end peak stage of overwintering generation eclosion occurred on June 8, June 17 and July 1, respectively. [Conclusion]  Because larvae of O. furnacalis mainly overwinter in stalks and cobs, it is important to destroy these as soon as practicable after the harvest. Observations of overwintering generation pupation indicate that the best time to control first generation larvae is from mid to late June and the best time to control second generation larvae is mid-July.


 

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