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首页> 外文期刊>Australian Journal of Crop Science >Control of leaf spot disease caused by Cercospora sp on groundnut (Arachis hypogaea) using methanolic extracts of yellow oleander (Thevetia peruviana) seeds
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Control of leaf spot disease caused by Cercospora sp on groundnut (Arachis hypogaea) using methanolic extracts of yellow oleander (Thevetia peruviana) seeds

机译：使用黄色夹竹桃（Thevetia peruviana）种子的甲醇提取物控制花生（Cercospora sp）引起的花生（Arachis hypogaea）叶斑病

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A study was carried out in Yaounde (Cameroon) on two cultivars of groundnuts (Bafia var. and 55-437 var.) treated with methanolic extracts of Thevetia peruviana seeds (METPS), to evaluate the epidemiology of Cercospora leaf spots (CLS) and the antifungal potentials of these extracts under natural conditions. METPS were obtained by maceration of seed powder (0,33 kg/l) in methanol. Two concentrations of METPS (1.8 and 3.7 kg/ha), a benomyl and a control treatments were used in four replicates of a randomised block design. Disease severity, incidence, lesion size and yield were assessed. Two foliar applications of antifungal substances were effected at 15 days interval. The epidemic on both groundnut varieties was low in plots sprayed with METPS and benomyl when compared with the control. Disease incidence, lesion size and CLS severity were reduced to 37.25, 33.10 and 32.61 % respectively in plots sprayed with METPS compared to the control. The Bafia var. was more tolerant to CLS than the 55-437 var. Groundnut yield increased by 32.89 and 41.37 % for the Bafia var following applications of METPS and benomyl respectively. These results suggest that integrating host resistance and METPS efficiently protects groundnut against CLS.
机译：在雅温得（喀麦隆）进行了两个花生品种（Bafia var。和55-437 var。）的研究，这些花生用Thevetia peruviana种子（METPS）的甲醇提取物处理过，以评估Cercospora叶斑（CLS）和这些提取物在自然条件下的抗真菌潜力。通过在甲醇中浸渍种子粉末（0.33 kg / l）获得METPS。在随机区组设计的四次重复试验中使用了两种浓度的METPS（1.8和3.7 kg / ha），苯菌灵和对照处理。评估疾病的严重程度，发生率，病变大小和产量。每隔15天进行两次叶面施用抗真菌物质。与对照相比，在涂有METPS和苯菌灵的地块上，两种花生品种的流行率均较低。与对照相比，在用METPS喷洒的地块中，疾病发生率，病变大小和CLS严重程度分别降低到37.25％，33.10％和32.61％。巴非亚变种比55-437 var更耐CLS。施用METPS和苯菌灵后，Bafia var的花生产量分别增加了32.89％和41.37％。这些结果表明，整合宿主抗性和METPS可以有效保护花生免受CLS侵害。

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