The Influence of Water Deficit Stress on the Grapevine Trunk Disease Pathogens Eutypa lata and Diplodia seriata
- 1 August 2021
- journal article
- research article
- Published by Scientific Societies in Plant Disease
- Vol. 105 (8), 2217-2221
- https://doi.org/10.1094/pdis-07-20-1538-re
Abstract
The increasing prevalence of the grapevine trunk diseases Eutypa and Botryosphaeria dieback has been attributed, in part, to abiotic stresses imposed on vineyards as production intensifies worldwide. The aim of this study was to evaluate the influence of water deficit irrigation practices on the infection of pruning wounds by Eutypa lata and Diplodia seriata and the subsequent rate of colonization. Two vineyard trials were conducted over two consecutive seasons in South Australia, one in the Riverland with ‘Cabernet Sauvignon’ with four irrigation treatments (100, 50, 25, and 12.5% of the standard irrigation program) and another in the Barossa Valley with ‘Shiraz’ on six rootstocks and own roots, either irrigated or not irrigated. According to leaf water potential assessments, vines with reduced irrigation were generally in water deficit and therefore subjected to stress. On the whole, incidence of wound infection and distance of colonization were similar between irrigation treatments for both pathogens, except in the Riverland, where E. lata colonized canes to a greater extent in well-watered vines than those in water deficit. Only vines on rootstock ‘Ramsey’ in the Barossa Valley had greater extent of colonization by E. lata in the nonirrigated vines. There was no correlation between internal staining and colonization, with both pathogens recovered to nearly 20 cm ahead of the staining. Water deficit did not increase the susceptibility of grapevine pruning wounds to infection or colonization of the subtending tissue by E. lata and D. seriata. In fact, there was evidence of lower susceptibility to colonization by E. lata in vines subjected to severe water deficit.Keywords
Funding Information
- Wine Australia (SAR1205)
This publication has 17 references indexed in Scilit:
- Susceptibility of grapevine tissues to Neofusicoccum luteum conidial infectionPlant Pathology, 2011
- Pathogenicity of Botryosphaeriaceae Species Isolated from Grapevine Cankers in CaliforniaPlant Disease, 2009
- The Influence of Climate on Foliar Symptoms of Eutypa Dieback in GrapevinesPhytopathology®, 2007
- The Influence of Grapevine Cultivar and Isolate of Eutypa lata on Wood and Foliar SymptomsPlant Disease, 2007
- A second pathway for gas out of the pressure chamber—what is being squeezed?Plant Physiology and Biochemistry, 2005
- Climate change and viticulture: A European perspective on climatology, carbon dioxide and UV-B effectsAustralian Journal of Grape and Wine Research, 2000
- Eutypine, a phytotoxin produced by Eutypa lata the causal agent of dying-arm disease of grapevinePhytochemistry, 1991
- WATER RELATIONS OF GRAPEVINESPublished by Elsevier BV ,1983
- Further Evidence thatEutypa armeniacae--notPhomopsis viticola--Incites Dead Arm Symptoms on GrapePlant Disease, 1981
- The quantity of inoculum required to infect apricot and other prunus species with Eutypa armeniacaeAustralian Journal of Experimental Agriculture, 1971