Vail M E, Wolpert J A, Gubler W D, Rademacher M R
Vino Farms, Inc., Healdsburg, CA 95448.
Department of Viticulture and Enology.
Plant Dis. 1998 Jan;82(1):107-109. doi: 10.1094/PDIS.1998.82.1.107.
Cluster tightness was measured and Botrytis bunch rot was evaluated for six Chardonnay clones in each of two trials, one cane-pruned and the other spur-pruned. In both locations, University of California (UC) Foundation Plant Materials Service (FPMS) clone 4 was most compact and FPMS 15 was the least compact (P < 0.01). Cluster tightness among the six clones, measured by the UC Firmness Tester Method, ranged from 0.0028 newtons (N) for clone 15 to 0.0112 N for clone 4. Cluster tightness was positively correlated with cluster weight. Botrytis bunch rot development was greater in the cane-pruned trial than in the spur-pruned trial. In the cane-pruned trial, disease incidence was greatest in FPMS 16 (81.5%) and least in clone 15 (44.5%; P< 0.025), while disease severity did not differ significantly. Neither incidence nor severity were significant in the spur-pruned trial. Clone 15, the clone with the least compact clusters, had the lowest disease severity levels.
在两项试验中，对六个霞多丽克隆品种进行了果穗紧密度测量，并评估了灰霉病穗腐病情况。两项试验中，一项采用单臂修剪，另一项采用短梢修剪。在两个地点，加利福尼亚大学（UC）基础植物材料服务中心（FPMS）的4号克隆品种果穗最紧密，15号克隆品种果穗最疏松（P < 0.01）。通过加州大学硬度测试仪法测量，六个克隆品种的果穗紧密度范围为15号克隆品种的0.0028牛顿（N）至4号克隆品种的0.0112 N。果穗紧密度与果穗重量呈正相关。单臂修剪试验中的灰霉病穗腐病发展情况比短梢修剪试验更严重。在单臂修剪试验中，FPMS 16的发病率最高（81.5%），15号克隆品种的发病率最低（44.5%；P < 0.025），而病情严重程度无显著差异。在短梢修剪试验中，发病率和病情严重程度均无显著差异。果穗最疏松的15号克隆品种，病情严重程度最低。
