果実吸蛾類特にヒメエグリバに関する研究-1-

概要

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1. To study the bionomics of smaller oreasia, investigations on its rearing in the laboratory and observations of moth emergence in the field were conducted at Kibi-cho, Arida-gun, Wakayama Prefecture where the annual avervage temperature is 16.7°C. 2. The relations between the temperature and the number of days required for growth of egg, larva and pupa are shown by two linear lines in Table 7. 3. The maximum survival period of adult in rearing tests in October was 34 days in female and 40.5 days in male. The maximum number of eggs laid was 862 in July when reared on tomato. 4. There was not much difference between the result of the rearing test in laboratory and that of the observation in the field, and although four gene rations were repeated normally, some ended in three generations. According to both investigations, the appearance of each stage was as follows Egg; late May-middle June, middle July-early August, late August-late September, and middle October-early November. Larva; early June-early July, middle July-late August, early September-late September (or early September-overwinter-early May), and late Octo ber-overwinter-early May. Pupa; early July-middle July, early August early September, late September-middle October, and late April-late May. Adult; early July-early August, middle August late September, middle Septmber-late November, and early May-early July.
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