Journal of Economic Entomology (2019) 112, 1292-1298

Federico Tacoli, Elena Cargnus, Alberto Pozzebon, Carlo Duso, Paola Tirello and Francesco Pavan (2019)
Side effects of kaolin and bunch-zone leaf removal on predatory mite populations (Acari: Phytoseiidae) occurring in vineyards
Journal of Economic Entomology 112 (3), 1292-1298
Abstract: The effects of kaolin and bunch-zone leaf removal on populations of predatory mites Kampimodromus aberrans (Oudemans) and Typhlodromus pyri Scheuten were assessed in the context of four trials (2015–2016) carried out against Lobesia botrana (Denis and Schiffermüller) (Lepidoptera: Tortricidae) in vineyards located in north-eastern Italy. Laboratory experiments were performed to evaluate the effects of kaolin on the survival and fecundity of K. aberrans and T. pyri populations originating from the same grape-growing area. In field trials, kaolin caused a gradual decrease in population density levels of both phytoseiid species (with the maximum reduction ranging from 49 to 91%) with a complete population recovery in the next spring. In laboratory experiments, kaolin was moderately harmful to both species, reducing their fecundity significantly (around 60%). Bunch-zone leaf removal determined lower phytoseiid populations in all trials, but this effect was significant only for K. aberrans in one of them. A limited use of kaolin and the adoption of bunch-zone leaf removal did not irreversibly affect phytoseiid populations in vineyards and thus can be considered compatible with IPM strategies.
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Link to article at publishers website
Database assignments for author(s): Elena Cargnus, Alberto Pozzebon, Carlo Duso, Francesco Pavan

Research topic(s) for pests/diseases/weeds:
control - general
health/environmental effects of pesticides
Research topic(s) for beneficials or antagonists:
environment/habitat manipulation
resistance to pesticides

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Lobesia botrana	Grapevine (Vitis)	Italy
Typhlodromus pyri (predator)			Italy
Kampimodromus aberrans (predator)			Italy