Effects of Pesticides and Fungicides Used on Grapevines on the Mealybug Predatory Beetle Nephus 'boschianus' (Coccinellidae, Scymnini)
Date
2001
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
South African Society for Enology and Viticulture
Abstract
The effects of frequently used grapevine insecticides and fungicides on adults of the predatory beetle Nephus 'boschianus' of vine mealybug, Planococcus ficus (Signoret), were determined under laboratory conditions. When applied as cover sprays the pesticides chlorpyrifos, endosulfan, cypermethrin, chlorfenapyr and mercaptothion were very toxic to the predator, whilst the fungicides penconazole, fosetyl-Al, mancozeb and an insecticidal soap plus oil mixture were harmless. These results suggest that the insecticides may be harmful to a biological control system where N. 'boschianus' populations were dominant during the season. The three fungicides and the soap plus oil mixture, however, should be compatible with biological control by N. 'boschianus'.
Description
CITATION: Walton, V. M. & Pringle, K. L. 2001. Effects of Pesticides and Fungicides Used on Grapevines on the Mealybug Predatory Beetle Nephus 'boschianus' (Coccinellidae, Scymnini). South African Journal of Enology & Viticulture, 22(2):107-110, doi:10.21548/22-2-2204.
The original publication is available at http://www.journals.ac.za/index.php/sajev
The original publication is available at http://www.journals.ac.za/index.php/sajev
Keywords
Grapes -- Diseases and pests, Pseudococcus maritimus -- Biological control, Grape mealybug -- Biological control, Insecticides -- Toxicology, Fungicides -- Environmental aspects
Citation
Walton, V. M. & Pringle, K. L. 2001. Effects of Pesticides and Fungicides Used on Grapevines on the Mealybug Predatory Beetle Nephus 'boschianus' (Coccinellidae, Scymnini). South African Journal of Enology & Viticulture, 22(2):107-110, doi:10.21548/22-2-2204