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首页> 外文期刊>Plant Disease >Biological control of grape powdery mildew using mycophagous mites.
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Biological control of grape powdery mildew using mycophagous mites.

机译：食真菌性螨虫对葡萄白粉病的生物防治。

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摘要

We evaluated the efficacy of a mycophagous tydeid mite, Orthotydeus lambi, in controlling grape powdery mildew on mature vines of nine different grape cultivars and one unnamed hybrid grown in an experimental vineyard over a 3-year period. O. lambi became well established on all vines where they were released. However, some cultivars supported higher densities than others, depending on, among other factors, the presence and abundance of leaf trichomes in vein axils (domatia). The establishment of O. lambi substantially reduced powdery mildew on foliage and fruit, although the magnitude of disease suppression was greater on some grape genotypes than others, depending on mite density and innate susceptibility to grape powdery mildew. Treatments where O. lambi was used alone were as effective as fungicide. Significantly better disease control was found in treatments with both mites and fungicides. The mass of pruning material and leaf photosynthetic rates were significantly greater for vines with O. lambi, fungicide, or a combination of mites and fungicide compared with untreated vines. The combination of mites and fungicide resulted in significantly greater yield than mites or fungicide alone. Our results illustrate the potential of O. lambi for biological control of grape powdery mildew but also highlight limitations related to differences among grape genotypes in innate susceptibility to mildew and suitability for mites..
机译：我们评估了一种食真菌的tydeid螨Orthotydeus lambi在三年内控制九种不同葡萄栽培品种和一种未命名杂种的成熟葡萄藤上控制白粉病的功效。 O. lambi在释放它们的所有葡萄树上都非常成熟。但是，某些品种支持的密度比其他品种更高，这取决于除其他因素外，叶腋中毛状毛的存在和丰度（多毛）。 O. lambi的建立显着减少了叶子和果实上的白粉病，尽管某些螨虫基因型对疾病的抑制程度要强于其他葡萄基因型，这取决于螨虫的密度和对白粉病的先天敏感性。单独使用O. lambi的治疗与杀菌剂一样有效。在螨和杀真菌剂的治疗中发现明显更好的疾病控制。与未经处理的藤本植物相比，含有O. lambi，杀真菌剂或螨虫和杀真菌剂组合的藤本修剪材料的质量和叶片的光合速率明显更高。螨和杀真菌剂的组合比单独的螨或杀真菌剂产生明显更高的产量。我们的结果说明了O. lambi对葡萄白粉病进行生物防治的潜力，但同时也突出了与葡萄基因型在先天对霉菌的敏感性和对螨的适应性方面的差异有关的局限性。

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