REDIA (2001) 84, 1-17

V. Girolami, N. Mori, E. Marchesini and C. Duso (2001)
Organophosphate resistance in grape leafhoppers and IPM strategies
REDIA 84 (Suppl.), 1-17
Abstract: In the last two decades grape leafhoppers were managed, in particular Empoasca vitis (Göthe) (Homoptera Auchenorryncha Cicadellidae), in North-eastern Italy, by infrequent insecticide treatments carried out to manage the grape berry moths. The application of fewer insecticide treatments favored natural control of phytophagous mites by predators, mainly phytoseiids. In the late 1990s, the spread of Flavescence dorée, a grapevine disease transmitted by Scaphoideus titanus Ball (Homoptera Auchenorryncha Cicadellidae) and, to a lesser extent, the appearance of the nearctic Metcalfa pruinosa (Say) (Homoptera Auchenorryncha Flatidae) caused an increase of insecticide use in vineyards. Meanwhile, the management of grape leafhoppers (E. vitis) with broad-spectrum insecticides became ineffective. Experiments carried out to estimate the effectiveness of a number of organophosphates on E. vitis populations in vineyards showed field resistance. This phenomenon was confirmed in semi-laboratory tests. Moreover, the increased use of insecticides had disrupted the balance between phytophagous mites and their predators causing phytophagous mite outbreaks.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Carlo Duso

Research topic(s) for pests/diseases/weeds:
pesticide resistance of pest

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Hebata vitis	Grapevine (Vitis)	Italy