Phytoprotection (2003) 84, 141-148

Pierre Colignon, Éric Haubruge, Charles Gaspar and Frédéric Francis (2003)
Effets de la réduction de doses de formulations d'insecticides et de fongicides sur l'insecte auxiliaire non ciblé Episyrphus balteatus [Diptera : Syrphidae]
[Effects of reducing recommended doses of insecticides and fungicides on the non-target insect Episyrphus balteatus [Diptera: Syrphidae]]
Phytoprotection 84 (3), 141-148
Abstract: The aim of this work was to assess both lethal and sub-lethal effects of four pesticides commonly used in field vegetables in south Belgium (Wallonia) on Episyrphus balteatus [Diptera: Syrphidae]. Acute toxicity and long term effects of the pesticides at the recommended and reduced doses were assessed in laboratory conditions by exposing the insects on plant leaves previously treated with the considered pesticide. Both tested insecticides, namely Karate® and Pirimor®, were found to be very harmful for the beneficial hoverfly even at reduced doses. A kind of selectivity only appeared from 2.5% of the recommended dose. The two fungicides, namely Ronilan® and Quintalic®, which showed a moderate acute toxicity had induced negative effects on long-term parameters, on both development and reproduction.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: French)
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Database assignments for author(s): Frédéric Francis

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
resistance to pesticides

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
Episyrphus balteatus (predator)			Belgium