NDLI: The influence of acclimation, endosymbionts and diet on the supercooling capacity of the predatory bug Macrolophus pygmaeus

Content Provider	Springer Nature Link
Author	Maes, Sara Machtelinckx, Thijs Moens, Maurice Grégoire, Jean Claude Clercq, Patrick
Copyright Year	2012
Abstract	The generalist predator Macrolophus pygmaeus Rambur (Hemiptera: Miridae) is a key biological control agent in European greenhouses. The influence of acclimation, infection with endosymbiotic bacteria and diet on the cold tolerance of the Mediterranean biocontrol population was assessed by determining the supercooling point, i.e. the temperature at which the insect’s body fluids freeze. This parameter provides a first indication of an insect’s establishment potential in a new region and of its possible geographical range. Allowing the predatory bugs to adapt to lower temperatures resulted in an increase in supercooling ability. Macrolophus pygmaeus bugs exposed to antibiotics in their artificial diet and hence cured from their infection with the endosymbiotic bacteria Wolbachia pipientis, Rickettsia bellii and R. limoniae were more tolerant to freezing than infected bugs. The diet of the predators also affected the freezing temperature of the body fluids. Predators fed an artificial diet based on egg yolk were less resistant to freezing than those fed Ephestia kuehniella Zeller (Lepidoptera: Pyralidae) eggs. These findings illustrate that several factors may affect the cold hardiness of a biocontrol agent and may thus complicate the evaluation of its establishment potential in the framework of an environmental risk assessment.
Starting Page	643
Ending Page	651
Page Count	9
File Format	PDF
ISSN	13866141
Journal	BioControl
Volume Number	57
Issue Number	5
e-ISSN	15738248
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-03-31
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Biological control Environmental risk assessment Cold hardiness Heteroptera Wolbachia Rickettsia Agriculture Entomology Animal Biochemistry Animal Ecology Plant Pathology Behavioural Sciences
Content Type	Text
Resource Type	Article
Subject	Insect Science Agronomy and Crop Science

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