RT Journal Article
SR Electronic
T1 Hot Water Treatment of Dormant Grape Cuttings Reduces Crown Gall Incidence in a Field Nursery
JF American Journal of Enology and Viticulture
JO Am J Enol Vitic.
FD American Society for Enology and Viticulture
SP 325
OP 329
DO 10.5344/ajev.1990.41.4.325
VO 41
IS 4
A1 K. Ophel
A1 P. R. Nicholas
A1 P. A. Magarey
A1 A. W. Bass
YR 1990
UL http://www.ajevonline.org/content/41/4/325.abstract
AB Hot water treatment (50°C, 30 min) reduced the level of Agrobacterium tumefaciens biovar 3 below detection in naturally infested grape scions (cvs. Chardonnay and Zante Currant) and rootstocks (cvs. Ramsey and K51-40). Material was bench-grafted, then planted in a field nursery. After one season's growth, less than 2% of the hot-water-treated, grafted vines showed crown gall symptoms. In contrast, up to 60% of untreated control vines were galled. Hot water treatment had variable effects on graft take, dependent on cultivar, but there were no negative effects on vine growth or mortality in the nursery. After vines were grown in the nursery, A. tumefaciens biovar 3 was detected systemically in up to 16% of heat-treated vines for some scion/rootstock combinations while up to 60% infection was observed in control vines. Hot water treatment provided good control of crown gall symptoms but may have to be modified for use where complete eradication of the pathogen is required.