An Outbreak of the Cryptomeria Bark Borer, Semanotus japonicus LACORDAIRE(Coleoptera:Cerambycidae), in a Young Japanese Cedar(Cryptomeria japonica D.DON)Plantation : II. Between-Tree Distribution of Adult Emergence Holes and Its Relation to Tree Size

概要

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In a young Japanese cedar plantation cryptomeria bark borer Semanotus japonicus LACORDAIRE adults emerged from each tree were counted by noting emergence holes for each generation over a period of population increase and decline from 1976 to 1985. Adults began to emerge in 1976. Thereafter, the mean number of adults emerged per tree increased and reached a maximum (7.4 adults per tree) in 1982. The distribution pattern of the emergence holes appearing annually on the host trees changed considerably during the outbreak. The logarithm of the number of adults emerged from each tree correlated positively with tree diameter at breast height (DBH) which was measured in 1979. Most of the trees that the borer killed had previously produced many more adult borers than the trees that had survived the infestation.
日本応用動物昆虫学会の論文
1993-02-25