堅果類で発育するコクゾウムシ [in Japanese] Maize Weevil, Sitophilus zeamais breeding in acorns [in Japanese]
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The developmental period of the maize weevil, Sitophilus zeamais Motschulsky was examined by using four kinds (Castanea crenata, Castanopsis cuspidatan, Lithocarpus edulis and Quercus myrsinaefolia) of acorns. The maize weevil lays eggs and has grown an adult for all acorns. Neither the number of adult emerging nor the developmental period had a big difference among acorns of Castanea crenata, Castanopsis cuspidatan, and Lithocarpus edulis. As for the acorn of Quercus myrsinaefolia, the number of emerging was less than that of other acorns, and the developmental period were longer. The maize weevil was not able to be laid to the acorn with a flawless epicarp, and next generation's adult did not emerge.
- House and household insect pests
House and household insect pests 32(2), 59-63, 2010-12-30