ゴマダラカミキリの生態に関する研究 : I. 香川県下のカンキツ園におけるゴマダラカミキリ成虫の脱出孔の調査

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In citrus orchards under customary management selected from six regions in Kagawa Prefecture (Nagao, Aji, Shinden, Kinashi, Sakaide, and Nio), 300 trees (50 in each region) were randomly sampled. The number of adult emergence holes in the trees sampled and the distance of the holes from the ground were investigated, dividing them into "new" (produced in 1987) and "old" (pre-1987) groups. Trees with new or old emergence holes were found in every region, ranging from 50% of all trees in Nio to 94% in Shinden (average frequency of trees with emergence holes in all six regions was 66%)' The minimum and maximum frequencies of trees witkL new emergence holes were 10% (Aji) and 52% (Shinden), respectively (average for the six regions, 19.3%)' The mean number of emergence holes per tree bearing the holes varied from 2.2 (Nagao and Nio) to 5.9 (Shinden) (average for the six regions, 3.8). Among all trees sampled, the maximum number of emergence holes per tree was 36 (Sakaide). These results indicate frequent emergence, and therefore considerable citrus tree damage, of adult beetles even in orchards with coriventional pest control. The vertical distribution of emergence holes was centralized into a zone within 30 cm from the ground, independent of hole freshness or the location of the investigated region, though it shifted slightly upward as the number of emergence holes increased. From daily changes in the numbers of new emergence holes investigated in an orchard under uncontrolled management (Maeda-higashi region), it was found that the dates of first, last and 50% emergence were June 8,July 14 and June 26,respectively.
日本応用動物昆虫学会の論文
1990-02-25

ゴマダラカミキリの生態に関する研究 : I. 香川県下のカンキツ園におけるゴマダラカミキリ成虫の脱出孔の調査

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