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Your Position :Home->Past Journals Catalog->2009年46 No.3

Dynamics and population characteristics of Cnaphalocrocis medinalis in early rice field in Yongfu County, Guangxi, in 2008
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Key Words:Cnaphalocrocis medinalis, ovary development, population characteristics, heavy rainstorm
Abstract:
The dynamics and population characteristics of Cnaphalocrocis medinalis (Guenée) in early rice fields in Yongfu, Guangxi, in 2008 were studied through the systematic investigation and female ovarian dissection. The results showed that C.medinalis occurred four generations each year in Yongfu. The 1st and 2nd generation were mostly immigrants. The 3rd generation was dominated by the local colonizer, with some immigrants and emigrants. The 4th generation was basically emigrants. It indicated that heavy rainstorm did not affected  the dynamics of C. medinalis adults significantly, whereas there was significant different of population of C. medinalis among the field patches with different flooding.In addition, the reasons that the cause serious outbreak of C. medinalis in Yongfu in 2008, was analyzed and discussed.
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