RELATIONSHIPS BETWEEN GRAPE PHYLLOXERA ABUNDANCE, FUNGAL INTERACTIONS AND GRAPEVINE DECLINE
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.
Edwards, J., Norng, S., Powell, K.S. and Granett, J. (2007). RELATIONSHIPS BETWEEN GRAPE PHYLLOXERA ABUNDANCE, FUNGAL INTERACTIONS AND GRAPEVINE DECLINE. Acta Hortic. 733, 151-157
phylloxera, grapevine vigour, root necrosis, Fusarium, genotype, Vitis vinifera