ルビーアカヤドリコバチおよびアカヤドリコバチの寄主選択の研究 : 3.ルビーアカヤドリコバチの羽化期による寄主選択性のちがいの解析

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Anicetus beneficus shows two generations in a year, the first emergence takes place in June and the second in September. On the other hand, host scale, Ceroplastes rubens, has one generation in a year, the new generation appearing in June or July. Therefore, the first brood of this wasp commonly attacks the young stage of scales, and the second brood the matured stage. In the previous paper, the author reported that the remarkable difference in the tendency of host selection could bee seen between the first and the second broods of wasps, although it was not clear whetehr the difference was due to the different states of the host or to the different nature of the first and the second broods of the parasite. This experiment was therefore designed to solve this problem. The wasps of the prepupal stage were kept at the constant warm temperature (25℃). Under this condition, the wasps emerged in spring about three weeks earlier than those living in natural condition, when matured host scales were still alive in nature. Therefore, the experiment combining the first brood of the wasp and the matured host could be performed. The results of this selection experiment are shown in Tables 1-4 and Figure I. These results show that most individuals select C. rubens, whereas C. pseudoceliferus and C. japonicus are rearly attacked. These tendencies of host selection are very similar to those of the second brood of the wasp under the normal condition. In conclusion, it may be suggested that the conditions of host scales, especially those relation to the developmental stages of hosts, are very important in determining the differences of the behavior of host selection of this parasitic wasp.
社団法人日本動物学会の論文
1957-04-15

ルビーアカヤドリコバチおよびアカヤドリコバチの寄主選択の研究 : 3.ルビーアカヤドリコバチの羽化期による寄主選択性のちがいの解析

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