RT Journal Article
SR Electronic
T1 Vitis spp. Rootstocks Are Poor Hosts for Meloidogyne hapla, a Nematode Commonly Found in Washington Winegrape Vineyards
JF American Journal of Enology and Viticulture
JO Am J Enol Vitic.
FD American Society for Enology and Viticulture
SP 1
OP 8
DO 10.5344/ajev.2018.18027
VO 70
IS 1
A1 Inga A. Zasada
A1 Amanda D. Howland
A1 Amy B. Peetz
A1 Katherine East
A1 Michelle Moyer
YR 2019
UL http://www.ajevonline.org/content/70/1/1.abstract
AB The majority of winegrape (Vitis vinifera) vineyards in Washington are planted with own-rooted grapevines, as opposed to grapevines grafted onto rootstock varieties. The plant-parasitic nematode Meloidogyne hapla (common name: northern root-knot nematode) is commonly found in Washington winegrape vineyards, and own-rooted grapevines are susceptible to this nematode. Before rootstocks are used to manage M. hapla or other horticultural characteristics in Washington, their host status for M. hapla should be defined. In greenhouse experiments, 10 commercially available rootstock varieties were evaluated for their M. hapla host status. Additionally, the reproductive potential of different M. hapla populations collected from Oregon and Washington, and of another root-knot nematode, M. chitwoodi, on rootstock varieties and own-rooted V. vinifera Chardonnay was evaluated. The rootstocks Salt Creek, Freedom, Harmony, St. George, Riparia Gloire, 101-14 Mgt, 3309C, 110R, 420A, and Matador were poor hosts for M. hapla. Populations of M. hapla varied in reproductive potential and virulence on own-rooted Chardonnay. An M. hapla population collected from a V. vinifera vineyard in Paterson, WA had 33 to 78% greater reproduction than the other M. hapla populations. An M. hapla population collected from a V. vinifera vineyard in Alderdale, WA was consistently more virulent than the other M. hapla populations. Own-rooted Chardonnay and the rootstock Matador were poor hosts for M. chitwoodi. This is the first report of the host status of several grapevine rootstocks for M. hapla.