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首页> 外文期刊>Plant Protection Science >Influence of oxathiapiprolin on preinfectional and early infection stages of Plasmopara halstedii , downy mildew of the sunflower
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Influence of oxathiapiprolin on preinfectional and early infection stages of Plasmopara halstedii , downy mildew of the sunflower

机译：恶血吸虫对疟原虫预折排水和早期感染阶段的影响，向日葵霜霉病

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Oxathiapiprolin is a recently introduced fungicide with particular activity against hemibiotrophic and biotrophic oomycetes. For Plasmopara halstedii, the downy mildew of the sunflower, no detailed studies for the activity of the pure compound on the preinfectional and early infection stages in which the fungicide could most effectively interfere with the life cycle of the pathogen have been reported. The fungicide was shown to be active against all stages of the pathogen starting from the release of the zoospores to the development of the mycelia and the formation of the sporangia. Differences in the sensitivity of the different developmental stages are in accordance with the suggested mechanism of the fungicide activity which targets sterol-binding proteins. The experiments showed that, in preventive treatments against very sensitive stages of the pathogen (such as germination of spores), extremely low concentrations of less than 1 ng/mL can completely protect the plants. Coating the seeds with oxathiapiprolin successfully prevented the seedlings from soil-borne infections. This is of particular importance in sunflower cultivation, because wind-borne infections on plants are much rarer and less harmful than soil-borne infections, which usually become systemic and lead to complete yield loss. The curative effects of oxathiapiprolin were shown on the leaf disks as well as on the infected young plants. However, this seems to be less important in sunflower cultivation than, for instance, in viticulture, because spraying sunflowers in the field after the germination of the seeds is uncommon (except in the ornamental cultivation of cut sunflowers).
机译：血脂蛋白是最近引入的杀真菌剂，特别是针对血管营养和生物养殖卵黄细胞的特定活性。对于疟原虫，向日葵的柔软性霉菌，对纯化合物的活性进行了详细的研究，用于预先进行的杀菌剂和早期感染阶段的活性，其中杀菌剂最有效地干扰病原体的生命周期。从动物孢子释放到菌丝孢子的发育和孢子囊的形成开始，杀菌剂被针对病原体的所有阶段活跃。不同发育阶段的敏感性的差异符合靶向甾醇结合蛋白的杀真菌活性的建议机制。该实验表明，在预防性治疗病原体的非常敏感阶段（例如孢子的萌芽），小于1ng / ml的极低浓度可以完全保护植物。用恶血吸虫涂层种子成功地防止了土壤传播感染的幼苗。这对向日葵培养是特别重要的，因为植物的风力感染很少，而不是土壤传播感染的损失很少，并且通常变得全身性并导致完全产量损失。血脂蛋白的疗法显示在叶片磁盘以及感染的幼苗上。然而，这似乎在向日葵栽培中的似乎不太重要，例如在葡萄栽培中，因为在种子的萌发后喷洒在场上的向日葵罕见（剪切向日葵的观赏栽培除外）。

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