CJO - Abstract - Grape variety affects larval performance and also female reproductive performance of the European grapevine moth <italic>Lobesia botrana</italic> (Lepidoptera: Tortricidae)

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    Grape variety affects larval performance and also female reproductive performance of the European grapevine moth Lobesia botrana (Lepidoptera: Tortricidae)

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Bulletin of Entomological Research (2006), 96 : 205-212 Cambridge University Press
doi:10.1079/BER2005417 (About doi)
Published online by Cambridge University Press 09 Mar 2007
 
Cambridge Journals Online - CUP Full-Text Page
Bulletin of Entomological Research (2006), 96:205-212 Cambridge University Press
Copyright © Cambridge University Press 2006
doi:10.1079/BER2005417

Review Article

Grape variety affects larval performance and also female reproductive performance of the European grapevine moth Lobesia botrana (Lepidoptera: Tortricidae)

J. Moreaua1 p1, B. Benreya1 and D. Thiérya2 c1

a1 Institut de Zoologie, Université de Neuchâtel, CH-2007 Neuchâtel, Switzerland
a2 UMR 1065 INRA-ENITAB en Santé Végétale, INRA, Institut Supérieur de la Vigne et du Vin, BP 81, F-33883 Villenave d'Ornon Cedex, France
Article author query
moreau j PubMed  Google Scholar
benrey b PubMed  Google Scholar
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Abstract

For insect herbivores, the quality of the larval host plant is a key determinant of fitness. Therefore, insect populations are supposed to be positively correlated with the nutritional quality of their host plant. This study aimed to determine if and how different varieties of grapes (including the wild grape Lambrusque) affect both larval and adult performance of the polyphagous European grapevine moth Lobesia botrana (Denis & Schiffermüller). Significant differences were found in larval development time, but not in pupal mass, adult emergence rate, or sex ratio. Although the fecundity of females is not different among varieties, females fed on some varieties produced eggs of different sizes which are correlated to their fertility. Thus, females adapt resource allocation to eggs depending on their diet as larvae. Using a fitness index, the average reproductive output was found to be highest for females reared on cv. Chardonnay. Females reared on wild grape produced a fitness index identical to the cultivated grapes. However, Lambrusque and Gewurztraminer separate themselves from the cultivated varieties according to our discriminant analyses. It is emphasized, through this study, that cultivars fed on by larvae should be considered in the population dynamics of L. botrana and that egg number is insufficient to determine host plant quality.

(Accepted November 11 2005)

Keywordsfemale reproductive output; fitness; host plant selection; insect–plant relationships; larval food

Correspondence:

c1 *Fax: +33(0)557122621 E-mail: thiery@bordeaux.inra.fr

p1 Université de Bourgogne, Equipe Ecologie-Evolution, UMR 5561, Biogéosciences, 6 Bd Gabriel, F-21000 Dijon, France

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