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

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

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

Authors

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

Authors Affiliations

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

Publication Information

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

PDF of full article, Cite this article

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.

Also in this issue:

Publicly funded agricultural research: An impending crisis?

Can farmers use water more effectively?: Two on-farm demonstrations compare irrigation methods

Reducing drainwater: Furrow vs. subsurface drip irrigation

Subsurface drip produced highest net return in Westlands area study

Analysis: Demonstration projects compared

South Sierra oak regeneration wak in sapling stage

How quality relates to price in California fresh peaches

Trace elements limit potential for blending San Joaquin drainwater with canal water

Low-input technology proves viable for limited-resource farmers in Salinas Valley

Treatment of destructive elm leaf beetle should be timed by temperature

To control mealybugs, stop honeydew-seeking ants

If registered, fungicide could reduce cavity spot of carrots

The effects of different pasture and rangeland ecosystems on the annual dynamics of insects in cattle droppings