産地の異なるジャガイモヒゲナガアブラムシAulacorthum solani（Kaltenbach）（カメムシ目：アブラムシ科）個体群のダイズ9品種での発育と増殖

概要

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Development and reproduction of five populations of foxglove aphid, Aulacorthum solani (Kaltenbach), were investigated in nine soybean cultivars. Significant differences were observed in the development duration, aphid fecundity and the intrinsic rate of the natural increase of the aphid populations reared on the soybean cultivars. A delay in aphid development and a decrease in aphid fecundity were observed in all aphid populations reared on ‘Adams,’ an aphid-resistant soybean cultivar. In the Tochigi aphid population reared on ‘William82,’ a soybean cultivar that is susceptible to soybean aphid, a marked delay in aphid development was observed. In addition, aphid fecundity decreased and the intrinsic rate of the natural increase was very low. No resistance was observed in the four remaining aphid populations. The Toyama and Hokkaido populations exhibited similar patterns of development and reproduction when reared on the nine soybean cultivars. Thus, in order to assess the development of aphid resistance in soybean cultivars, the findings of this study suggest that the biological performance of aphids on soybean cultivars should be investigated using other aphid populations from different locations and biotypes.