Articles
RELATIONSHIPS BETWEEN GRAPE PHYLLOXERA ABUNDANCE, FUNGAL INTERACTIONS AND GRAPEVINE DECLINE
Article number
733_16
Pages
151 – 157
Language
English
Abstract
Grape phylloxera (Daktulosphaira vitifoliae) populations were found in high numbers at two field sites in the north-east of Victoria, Australia, on Vitis vinifera Cabernet Sauvignon roots.
Differences in population abundance were observed with phylloxera genetic strain G4 being more abundant than G1. Root necrosis in phylloxera-infested grapevine roots reached levels of up to 26% and was associated with the presence of fungal pathogens, of which Fusarium oxysporum was the most prevalent.
The implications for phylloxera management and detection are discussed.
Differences in population abundance were observed with phylloxera genetic strain G4 being more abundant than G1. Root necrosis in phylloxera-infested grapevine roots reached levels of up to 26% and was associated with the presence of fungal pathogens, of which Fusarium oxysporum was the most prevalent.
The implications for phylloxera management and detection are discussed.
Publication
Authors
J. Edwards, S. Norng, K.S. Powell, J. Granett
Keywords
phylloxera, grapevine vigour, root necrosis, Fusarium, genotype, Vitis vinifera
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