Sosnowski M R, Lardner R, Wicks T J, Scott E S
Cooperative Research Centre for Viticulture and South Australian Research and Development Institute, GPO Box 397, Adelaide, SA, 5001 Australia.
Cooperative Research Centre for Viticulture and Discipline of Plant and Food Science, School of Agriculture, Food and Wine, The University of Adelaide, Waite Campus, Glen Osmond, SA, 5064 Australia.
Plant Dis. 2007 Aug;91(8):924-931. doi: 10.1094/PDIS-91-8-0924.
Grapevine cultivar (Vitis vinifera) and isolate of Eutypa lata influence wood and foliar symptoms of Eutypa dieback. Foliar symptoms of Eutypa dieback developed within 8 months of inoculating young grapevines (cvs. Grenache, Cabernet Sauvignon, and Merlot) in a shadehouse. Isolates of E. lata from various wine regions in southern Australia varied in their ability to colonize inoculated grapevines and induce wood and foliar symptoms. Grapevine cultivars varied for wood and foliar symptom expression but not for mycelial colonization. However, the severity of foliar symptoms was not related to the rate of spread of the fungus in the grapevine. Furthermore, the staining of wood typically attributed to E. lata did not reflect the presence of the fungus because the fungus was detected up to 80 mm beyond the stain. A field trial with mature grapevines revealed significant differences in the rate of spread of wood staining due to E. lata among eight cultivars, with up to 50 mm/year detected in Cabernet Sauvignon and Shiraz grapevines. In the shadehouse, the maximum growth rate of E. lata was recorded to be 115 mm/year for Grenache rootlings. Information from this study may help to optimize management strategies for maintaining productivity of grapevines with Eutypa dieback, thus reducing the economic impact of the disease.
葡萄品种（欧亚种葡萄）和葡萄座腔菌的分离株会影响葡萄蔓割病的木质部和叶片症状。在温室中对接种的幼龄葡萄树（品种为歌海娜、赤霞珠和美乐）接种后8个月内出现了葡萄蔓割病的叶片症状。来自澳大利亚南部不同葡萄酒产区的葡萄座腔菌分离株在定殖接种葡萄树并诱发木质部和叶片症状的能力上存在差异。葡萄品种在木质部和叶片症状表现上有所不同，但在菌丝定殖方面没有差异。然而，叶片症状的严重程度与真菌在葡萄树中的传播速度无关。此外，通常归因于葡萄座腔菌的木质部染色并不能反映真菌的存在，因为在染色区域以外80毫米处仍能检测到真菌。一项针对成熟葡萄树的田间试验表明，八个品种中因葡萄座腔菌导致的木质部染色传播速度存在显著差异，赤霞珠和设拉子葡萄树中检测到的传播速度高达每年50毫米。在温室中，歌海娜幼苗的葡萄座腔菌最大生长速度记录为每年115毫米。这项研究的信息可能有助于优化管理策略，以维持感染葡萄蔓割病的葡萄树的生产力，从而降低该病的经济影响。
