Basic study on the ecology of Anoplophora glabripennis and meteorology in Ningxia, China
2001
Ishigooka, Y. (National Inst. of Agro-Environmental Sciences, Tsukuba, Ibaraki (Japan)) | Urano, S. | Okada, K. | Takeda, T. | Wang, X. | Machimura, T. | Horiguchi, I. | .
Spatial patterns and relations between seasonal breeding activity and meteorological conditions regarding Anoplophora glabripennis (which attacks the trunks of trees and causes serious damage) were revealed as a result of daily field survey concerning oviposition scars, larval excrete holes and adult emergence holes in an artificial forest in Ningxia, China. The horizontal spatial distribution of holes showed heavier concentrations than did scars. This is caused by the difference of survival rate among the trees during the larval stage. The spatial correlation index of scars with larval excretes was obviously higher than that with holes; that is, as sites for their ovipositions, females tend to select trees that are only slightly injured. Seasonal variation of the number of scars in the mid-summer season was synchronized with that of the mean daily temperature. Moreover, the numbers of scars were clearly correlated with accumulated temperature readings within the term of effective sunshine (solar radiation > = 0.47MJ/square m/hour). These results indicate that dry climate conditions, like Ningxia, were suitable for the breeding activities of adults.
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