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01.02.2014 | Ausgabe 1/2014

BioControl 1/2014

Performance of the predatory mite Amblydromalus limonicus on factitious foods

Zeitschrift:
BioControl > Ausgabe 1/2014
Autoren:
Dominiek Vangansbeke, Duc Tung Nguyen, Joachim Audenaert, Ruth Verhoeven, Bruno Gobin, Luc Tirry, Patrick De Clercq
Wichtige Hinweise
Handling Editor: Ralf Ehlers.
An erratum to this article can be found at http://​dx.​doi.​org/​10.​1007/​s10526-014-9567-x.

Abstract

Amblydromalus limonicus Garman & McGregor (Acari: Phytoseiidae) is a generalist predatory mite with economic potential to control thrips and whiteflies in protected cultivation. We tested the development and reproduction of A. limonicus on three food sources with potential for use in laboratory production or to support its populations in a crop: fresh cattail pollen, Typha latifolia L. (Poales: Typhaceae), dry decapsulated cysts of the brine shrimp Artemia franciscana Kellogg (Branchiopoda: Artemiidae) and frozen eggs of the Mediterranean flour moth, Ephestia kuehniella Zeller (Lepidoptera: Pyralidae). The diets were tested both on an artificial substrate and on kidney bean leaves. In the absence of food, all larvae died on the artificial substrate, whereas they succeeded in reaching the protonymphal stage on bean leaves. Immature survival was high (>90 %) on all diet–substrate combinations, except when E. kuehniella eggs were offered on the artificial substrate (35 % survival). Both sexes showed the fastest development when offered E. kuehniella eggs on leaf discs, followed by A. franciscana cysts, whereas the slowest development was achieved on T. latifolia pollen. Fecundity and oviposition rate were higher on E. kuehniella and A. franciscana than on T. latifolia. Amblydromalus limonicus females lived longer on the leaf discs than on the artificial substrates. The intrinsic rate of increase (rm) was highest when E. kuehniella eggs were offered on leaf discs (0.256 females per female per day), whereas the lowest rate (0.128 females per female per day) was obtained when the eggs were provided on artificial substrates. The intrinsic rate of increase on A. franciscana cysts was not affected by substrate and averaged 0.22 females per female per day. Diet significantly influenced the size of A. limonicus females as measured by the distance between specific setae on the dorsal shield of the idiosoma. The application of the investigated food sources to sustain a colony of predatory mites upon their release in a greenhouse crop is discussed.

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