Effect of Crowding during the Larval Period on the Determination of the Wing-form of an Adult Plant-hopper

Abstract

THE effect of crowding on the physiological and morphological characters of larvæ or adult has attracted attention. Comprehensive reviews have published Allee1, by Chauvin2. The latter distinguished two categories in the general effect of crowding, “l'effet de masse” and “l'effet de groupe”, which had been proposed by Grassé. Bonnemaison3, in his studies on the factors affecting the appearance of the winged form in aphids, and Badonnel4, working on the complete development of the wings in Psocoptera, found that the most important effect of crowding occurs during the developmental period.

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References

  1. 1

    Allee, W. C., “Animal Aggregation” (Chicago, 1931).

  2. 2

    Chauvin, R., Colloq. Int. Cent. Nat. Recherche Sci., 34, 81 (1953).

  3. 3

    Bonnemaison, L., Ann. Inst. Recherche Agron., C, Ann. Epiphyt., 2, 1 (1951).

  4. 4

    Badonnel, A., C.R. Acad. Sci., Paris, 228, 1517 (1949).

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