Abstract Powdery mildew (Erysiphe necator Schwein) is a major disease of grapevines. Extensive empirical information is available on the performance of fungicide programs, but little is known about the influence of cultivar, management system and especially the climate on grape growers’ fungicide use practices. Fungicide use records were analysed from a database that covered fifteen Australian production regions, seven seasons, and eight cultivars. Sulphur was the predominant fungicide used. Differences in fungicide programs were small between cultivars relative to differences between seasons. Fungicides were applied later in the season than recommended; after fruit set. The evapotranspiration during the 30-days following the separation of the first leaf from the shoot tip was a good predictor of the number of agrochemicals applied in all but the cooler regions. Growers overwhelmingly conformed to guidelines to prevent the development of fungicide resistance. The effectiveness of fungicide programs may be further improved by increasing the proportion of applications early in the season, targeting more susceptible cultivars, and using evapotranspiration to help identify and respond to seasons with high disease pressure. A better understanding of the practices of grape-growers may allow the refinement of fungicide use recommendations.

中文翻译：

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用于管理澳大利亚葡萄园白粉病（Erysiphe necator）的杀菌剂计划

摘要 白粉病（Erysiphe necator Schwein）是葡萄树的主要病害。关于杀菌剂计划的性能有大量的经验信息可用，但对栽培品种、管理系统，尤其是气候对葡萄种植者杀菌剂使用实践的影响知之甚少。杀菌剂使用记录是从涵盖澳大利亚 15 个产区、7 个季节和 8 个栽培品种的数据库中分析的。硫是主要使用的杀菌剂。相对于季节之间的差异，品种之间杀菌剂计划的差异很小。杀菌剂的施用时间比推荐的晚；坐果后。第一片叶子与茎尖分离后 30 天内的蒸散量是除较冷地区外的所有地区施用的农用化学品数量的良好预测指标。种植者绝大多数都遵守了防止杀菌剂抗性发展的指导方针。杀菌剂计划的有效性可以通过增加季节早期的应用比例、针对更易感的品种以及利用蒸散来帮助识别和应对高疾病压力的季节来进一步提高。更好地了解葡萄种植者的做法可以改进杀菌剂的使用建议。杀菌剂计划的有效性可以通过增加季节早期的应用比例、针对更易感的品种以及利用蒸散来帮助识别和应对高疾病压力的季节来进一步提高。更好地了解葡萄种植者的做法可以改进杀菌剂的使用建议。杀菌剂计划的有效性可以通过增加季节早期的应用比例、针对更易感的品种以及利用蒸散来帮助识别和应对高疾病压力的季节来进一步提高。更好地了解葡萄种植者的做法可以改进杀菌剂的使用建议。