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首页> 外文期刊>Revista ciencia agronomica >Severidade de antracnose em folhas de sorgo submetido a doses crescentes de silício
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Severidade de antracnose em folhas de sorgo submetido a doses crescentes de silício

机译：高粱叶片中炭疽病的严重性

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Anthracnose in the leaves of sorghum plants is caused by the fungus Colletotrichum sublineolum Hann. Kabát et Bub. (syn. C. graminicola (Ces.) GW Wils.), and is responsible for reducing the yield of grain and forage. The proper management of the mineral nutrition of the plant may be a mechanism for the control of anthracnose. Among the minerals used in disease management, silicon stands out for reducing the severity of the disease in various crops. Given the above, this study aimed to assess the severity of anthracnose in different sorghum genotypes when supplemented with increasing levels of silicon. To this end, experiments were carried out under both greenhouse and field conditions, where the sorghum genotypes DOW 1F305 and A9735R were supplemented with increasing levels of silicon (0, 500, 1000, 1500, 2000, and 4000 kg ha-1) and assessed for the severity of anthracnose. We evaluated the severity of the disease with a rating scale and then samples were collected for determination of the concentration of silicon in the leaves. After analyzing the results, it was concluded that there was a reduction in the severity of anthracnose in response to fertilization with silicon in both of the evaluated genotypes. Although genotype DOW 1F305 accumulated lower silicon levels in the leaves, it was more resistant to foliar anthracnose.
机译：高粱植物叶片中的炭疽病是由真菌Colletotrichum sublineolum Hann引起的。 Kabátet Bub。 （C. graminicola（Ces。）GW。Wils。的同名），负责减少谷物和牧草的产量。植物矿物质营养的适当管理可能是控制炭疽病的一种机制。在疾病管理中使用的矿物质中，硅在降低各种作物的病害严重程度方面脱颖而出。鉴于上述情况，本研究旨在评估补充高水平硅时不同高粱基因型炭疽病的严重性。为此，在温室和田间条件下进行了实验，在其中向高粱基因型DOW 1F305和A9735R添加了增加水平的硅（0、500、1000、1500、2000和4000 kg ha-1）并进行了评估。炭疽病的严重程度。我们用等级量表评估了疾病的严重程度，然后收集样品以确定叶片中硅的浓度。在对结果进行分析之后，可以得出结论，在两种评估的基因型中，炭疽病的严重性均因硅的施肥而降低。尽管基因型DOW 1F305在叶片中积累了较低的硅水平，但对叶炭疽病的抵抗力更高。

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