INDUCTION OF SPECIFIC FOOD PREFERENCE IN LEPIDOPTEROUS LARVAE1

Entomologia Experimentalis et Applicata - Tập 11 Số 2 - Trang 211-230 - 1968
T. Jermy1, Frederick W. Hanson1, V. G. Dethier1
1Leidy Laboratory of Biology, University of Pennsylvania, Philadelphia, Pennsylvania 19104, U.S.A.

Tóm tắt

Last instar larvae of Manduca sexta (Johanssen) and Heliothis zea (Boddie), fed on different host plants or on artificial diet, and then tested individually, have shown clear preference for the plant previously eaten. This induced preference is specific for the inducing plant species and is not merely a change in the insect's general threshold of food acceptability. The extent to which preference can be induced by various host plants differs considerably. No induction is possible with plants outside the insect's host range. In larvae fed on artificial diet preference to a given host plant can be induced even by a one‐day feeding on it. A preference once induced is not wiped out by two larval moults and subsequent feeding on an artificial diet. Thus it is supposed that the information serving as a basis for the induced feeding habit is stored in the central nervous system. The possible ecological significance of the induced preference is discussed.

ZUSAMMENFASSUNG

INDUZIERTE NAHRUNGSPRÄFERENZ BEI SCHMETTERLINGSRAUPEN

Larven des letzten Entwicklungsstadium von Manduca sexta (Sphingidae) und Heliothis zea (Noctuidae), die an verschiedenen Wirtspflanzen gezüchtet wurden, bevorzugten in individuellen Nahrungswahlversuchen jene Pflanzenarten, an welchen sie sich entwickelten. Diese induzierte Präferenz ist spezifisch für die induzierende Pflanzenart und nicht einfach eine allgemeine Verschiebung der Reizschwelle für Frass‐ bzw. Vergällungsstoffe. Die Stärke der durch verschiedene Wirtspflanzen induzierten Präferenz variierte von Pflanze zu Pflanze erheblich. Es war nicht möglich, Präferenz für eine Pflanzenart ausserhalb des Wirtspflanzenkreises zu induzieren. In den an künstlicher Nahrung gezüchteten Raupen entwickelte sich die Präferenz für eine gegebene Wirtspflanze bereits während einer eintägigen Ernährung an derselben. Die einmal erworbene Präferenz wurde selbst durch zwei Häutungen und Ernährung mit künstlicher Nahrung nicht ausgelöscht. Demnach wird angenommen, dass die als Basis für die induzierte Präferenz dienende Rezeptoreninformation im Zentralnervensystem gespeichert wird. Die wahrscheinliche ökologische Bedeutung der induzierten Präferenz wird besprochen.

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Entomologia Experimentalis et Applicata

Tập 11 Số 2

211-230

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