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Exp Appl Acarol

Title:		The predatory mite Typhlodromalus aripo prefers green-mite induced plant odours from pubescent cassava varieties
Author(s):		Onzo A; Hanna R; Sabelis MW;
Address:		"Biological Control Centre for Africa, International Institute of Tropical Agriculture, 08 B.P. 0932, Cotonou, Benin, West Africa. onzalex@yahoo.com"
Journal Title:		Exp Appl Acarol
Year:		2012
Volume:		20120629
Issue:		4
Page Number:		359 - 370
DOI:		10.1007/s10493-012-9595-0
ISSN/ISBN:		1572-9702 (Electronic) 0168-8162 (Print) 0168-8162 (Linking)
Abstract:		"It is well known that plant-inhabiting predators use herbivore-induced plant volatiles to locate herbivores being their prey. Much less known, however, is the phenomenon that genotypes of the same host plant species vary in the attractiveness of these induced chemical signals, whereas they also differ in characteristics that affect the predator's foraging success, such as leaf pubescence. In a series of two-choice experiments (using a Y-tube olfactometer) we determined the preference of Typhlodromalus aripo for pubescent versus glabrous cassava cultivars infested with the cassava green mite Mononychellus tanajoa and also the preference for cultivars within each of the two groups. We found that when offered a choice between pubescent and glabrous cassava cultivars (either apex or leaves), T. aripo was significantly more attracted to pubescent cultivars. For each cultivar, M. tanajoa infested leaves and apices were equally attractive to T. aripo. There was however some variation in the response of T. aripo to M. tanajoa-infested plant parts within the group of pubescent cultivars, as well as within the group of glabrous cultivars. Our study confirms not only that T. aripo uses herbivore-induced plant volatiles to search for prey in cassava fields, but it also shows that it can discriminate between glabrous and pubescent cultivars and prefers the latter. This knowledge can be useful in selecting cultivars that are attractive and suitable to T. aripo, which, in turn, may promote biological control of the cassava green mite"
Keywords:		Africa Animals Choice Behavior Cues Female Genotype Manihot/*chemistry/genetics Mites/*physiology *Odorants *Predatory Behavior;
Notes:		"MedlineOnzo, Alexis Hanna, Rachid Sabelis, Maurice W eng Research Support, Non-U.S. Gov't Netherlands 2012/06/30 Exp Appl Acarol. 2012 Dec; 58(4):359-70. doi: 10.1007/s10493-012-9595-0. Epub 2012 Jun 29"