アブラムシの有し型胎生雌の出現について

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タイトル別名
  • The Emergence of Winged Viviparous Female in Aphid
  • アブラムシ ノ ユウシ ガタ タイセイ メス ノ シュツゲン ニ ツイテ 10
  • X. The Effect of Maturation and Water Content of Food Leaves upon the Wing Development in <i>Aphis maidis</i>
  • X. トウモロコシアブラムシ<i>Aphis maidis</i>の有し型出現に対する食草の熟度および汁液濃度の影響

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The relations between the wing development of the corn aphid, Aphis maidis, and the change in the qualities of food leaves, Hordeum vulgare and Holcus Sorghum L. var. japonicus, due to growth or maturation and between the former and the wilting of the leaves were examined experimentally with special comparison to the aphid, Rhopalosiphum prunifoliae.<br>1. When the larvae of Aphis maidis are given yellow leaves just before harvest, they can hardly complete their full development.<br>2. When the food leaves are very young the winged forms are scarcely produced regardless of the concentration of food sap. However the rate of wing production becomes higher with the maturation of the plants.<br>3. The effect of the maturation of host leaves upon the wing development seems to differ with the species of host plants.<br>4. The concentration of food sap, however, is likely to have nothing to do with the wing development regardless of the species of the host plants.<br>5. When the larvae are overcrowded on withered leaves, the winged forms are more readily produced than when overcrowded on the normal ones.<br>6. The wing development in the next generation does not seem to be influenced not only by the sap concentration of leaves on which the adults feed but also by that on which the adults and their progenies themselves successively feed.<br>7. Aphis maidis is apparently more sensitive in the production of winges than Rhopalosiphum prunifoliae to the change in the qualities of food leaves.

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