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Meded Rijksuniv Gent Fak Landbouwkd Toegep Biol Wet

Title:		Aphid prey suitability as environmental effect on Adalia bipunctata reproduction
Author(s):		Vanhaelen N; Gaspar C; Francis F;
Address:		"Pure and Applied Zoology Department, Gembloux Agricultural University, Passage des Deportes 2, B-5030 Gembloux, Belgium. vanhaelen.n@fsagx.ac.be"
Journal Title:		Meded Rijksuniv Gent Fak Landbouwkd Toegep Biol Wet
Year:		2002
Volume:		67
Issue:		3
Page Number:		563 - 568
DOI:
ISSN/ISBN:		1373-7503 (Print) 1373-7503 (Linking)
Abstract:		"Secondary plant metabolites (allelochemicals) play a major role in plant-insect interactions. Glucosinolates (GLS) and their degradation products from Brassica species are attractants and feeding stimulants for Brassicaceae specialist insects but are generally repellent and toxic for generalist herbivores. The impact of these compounds on crucifer specialist insects are well known but their effect on generalist predators is still not well documented. Prey host plant influence on reproduction of an aphidophagous beneficial, the two spot ladybird, was determined using the cabbage aphid, Brevicoryne brassicae reared on a crucifer plant, namely Brassica napus containing low GLS levels. As ladybird developmental and reproductive parameters were already shown to be strongly affected by the allelochemical presence in its preys, the unsuitable aphid and host plant combination was only momentary used to feed the A. bipunctata adults. A strong impact of the diet was observed on the beetle fecundity and the emerging offspring. Changing B. brassicae aphid to a suitable prey slowly improved the temporary negative effect of the former diet. These results enhance the food environmental effect and the importance of tritrophic relations in pest management strategies by predators. Indeed, more than the choice of the beneficial species, the prey host plant has a major influence on the potential efficacy of biological agent to control herbivore species such as aphids"
Keywords:		Animals Aphids/drug effects/*growth & development Brassica napus/metabolism Coleoptera/drug effects/*growth & development Female Food Chain Glucosinolates/metabolism/toxicity Host-Parasite Interactions/*drug effects Insect Repellents/metabolism/toxicity M;
Notes:		"MedlineVanhaelen, Nicolas Gaspar, Charles Francis, Frederic eng Belgium 2003/04/17 Meded Rijksuniv Gent Fak Landbouwkd Toegep Biol Wet. 2002; 67(3):563-8"