Phylloxera on rise…: Deadly insect pest poses increased risk to north coast vineyards

De Benedictis, J; Weber, E; Goheen, A; Granett, J; Wolpert, J

Phylloxera on rise…: Deadly insect pest poses increased risk to north coast vineyards

Authors

John A. De Benedictis
Edward Weber
Austin C. Goheen
Jeffrey Granett
James A. Wolpert

Authors Affiliations

John A. DeBenedictis is Staff Research Associate, Departrnent of Entomology, UC Davis; Edward Weber is Viticulture Farm Advisor, NapaCounty; Austin C. Goheen is Plant Pathologist, emeritis, UC Davis and USDA-ARS; Jeffrey Granett is Professor and Chair, Department of Entomology, UC Davis; James A. Wolpert is Extension Viticulturalist, Department of Viticulture and Enology, UC Davis.

Publication Information

Hilgardia 45(2):30-32. DOI:10.3733/ca.v045n02p30. March 1991.

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Abstract

Resistant rootstocks protect grape vines from phylloxera; however, a new form of this insect, Biotype B, threatens the survival of 70% of Napa and Sonoma County vineyards, those which are planted on the rootstock AxR#1. Research demonstrates that different accessions of AxR#l are equally susceptible to damage by this insect, a form of plant lice. The insect has spread from two sites in 1983 to more than 70 sites in those two counties; spread to other grapegrowing counties is likely.

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