Results 131 to 140 of about 532 (152)
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Diapause and overwintering of the hoverflyEpisyrphus balteatus
Entomologia Experimentalis et Applicata, 2007AbstractThe overwintering biology of the hoverflyEpisyrphus balteatus(DeGeer) (Diptera: Syrphidae) was studied and analysed. In Europe, females of this species can overwinter as adults in a facultative, reproductive diapause. The diapause phase is characterized by the ovaries ceasing to develop and by hypertrophy of the fat body.
Peter Hondelmann +1 more
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Oviposition site selection of Episyrphus balteatus
Entomologia Experimentalis et Applicata, 2000AbstractThe oviposition behaviour of Episyrphus balteatus DeGeer (Diptera: Syrphidae) was investigated in four‐choice experiments in screen cages and in experiments with direct behavioural observations. Females laid hardly any eggs in the absence of aphids and preferred larger aphid colonies to small ones.
D. Scholz, H.‐M. Poehling
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Side effects of pesticides on the larvae of the hoverfly Episyrphus balteatus in the laboratory
Phytoparasitica, 2010The hoverfly Episyrphus balteatus (Degeer) is one of the most abundant predators of the cabbage aphid (Brevicoryne brassicae (L.)) in brussels sprouts in Belgium. In the current laboratory study, the toxicity of several insecticides applied at maximum recommended field rates was investigated on the larvae of E. balteatus.
Joachim Moens +2 more
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Episyrphus balteatus as a predator of the aphid Sitobion avenae on winter wheat
Entomologia Experimentalis et Applicata, 1986AbstractRates of development of Episyrphus balteatus (Diptera: Syrphidae) indicate that three generations are possible during the season. Only one develops in the wheat crop. Feeding activity is highest during the night. Functional response curves for newly hatched larvae, 1 and 5 day‐old larvae were determined.
Ankersmit, G.W. +5 more
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Prey finding by larvae and adult females of Episyrphus balteatus
Entomologia Experimentalis et Applicata, 1998AbstractThe prey‐location behaviour of larvae of Episyrphus balteatus DeG. (Dipt.: Syrphidae) was investigated in two different experimental set‐ups. First instar larvae exhibited directed search over short distances, guided by olfactory cues from aphids, but not from honeydew.
Holger Bargen +2 more
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Biological Control, 2013
Abstract The availability of floral resources for hoverflies is important for growth, development and maintenance of adult individuals in crop fields in order to maximize their function as natural enemies. The objective of this study was to test the effect of five non-crop plant species – Anchusa azurea Mill. and Echium plantagineum L. (Boraginaceae),
Lara A. Pinheiro +3 more
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Abstract The availability of floral resources for hoverflies is important for growth, development and maintenance of adult individuals in crop fields in order to maximize their function as natural enemies. The objective of this study was to test the effect of five non-crop plant species – Anchusa azurea Mill. and Echium plantagineum L. (Boraginaceae),
Lara A. Pinheiro +3 more
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Biological Control, 2010
Abstract Augmentative biocontrol constitutes a safe option to reduce pest populations through the enhancement of natural enemies’ activity. In this context, the aphidophagous syrphid Episyrphus baltetaus (De Geer) (Diptera: Syrphidae) is a promising candidate for aphid biological control: larvae of this syrphid attack and consume a wide range of ...
Leroy, Pascal +4 more
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Abstract Augmentative biocontrol constitutes a safe option to reduce pest populations through the enhancement of natural enemies’ activity. In this context, the aphidophagous syrphid Episyrphus baltetaus (De Geer) (Diptera: Syrphidae) is a promising candidate for aphid biological control: larvae of this syrphid attack and consume a wide range of ...
Leroy, Pascal +4 more
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Resource exploitation by Episyrphus balteatus DeGeer (Diptera: Syrphidae) and intraguild predation
2001[no abstract]
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Overwintering of the hoverfly Episyrphus balteatus : long-distance migration or local overwintering?
2007[no abstract]
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