EFFECT OF CULTIVAR ON THE EFFICIENCY OF FUNGICIDES IN CONTROLLING POWDERY MILDEW OF FLAX AND RELATIONSHIP OF AGRONOMIC AND TECHNOLOGICAL TRAITS TO DISEASE SEVERITY FUNGICIDES FOR CONTROLLING POWDERY MILDEW OF FLAX

M. Alghuthaymi, A. Aly, A. Amal, K. Abd-Elsalam
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引用次数: 2

Abstract

A two-year field study was conducted at El-Ismailiya, Egypt, to evaluate the fungicides Bellis and Sulphurs applied as a foliar sprays for controlling powdery mildew on six flax cultivars. Disease severity, straw yield, and seed yield were used as criteria for evaluating the performance of fungicide on the tested cultivars. Analysis of variance (ANOVA) showed that each of the fungicides and cultivar was highly significant source of variation (p = 0.000), in disease severity, strae yield, and seed yieled. ANOVA also showed that fungicide x cultivars interaction was a highly significant source of variation (p = 0.000) in disease severity, while it was insignificant in straw and seed yields. Both fungicides were effective in reducing disease severity; however, sulphur surpassed Bellis in increasing straw yield and seed yield. Therefore, linear regression analysis was used to determine the relationship between agronomic or technological traits and powdery mildew severity (PMS). All traits showed significant negative correlations with PMS after the appliction of fungicides, which suggest that control of late-season powdery mildew could be economically important when PMS on flax cultivars is high.
品种对杀菌剂防治亚麻白粉病效果的影响及农艺技术性状与杀菌剂防治亚麻白粉病的关系
在埃及El-Ismailiya进行了一项为期两年的实地研究,以评价杀菌剂Bellis和硫磺在6个亚麻品种上作为叶面喷雾剂防治白粉病的效果。以病害严重程度、秸秆产量和种子产量作为评价杀菌剂对试验品种效果的标准。方差分析(ANOVA)表明,每种杀菌剂和品种在病害严重程度、品种产量和种子产量方面都是高度显著的变异源(p = 0.000)。方差分析还表明,杀菌剂与栽培品种的互作是病害严重程度的极显著变异源(p = 0.000),而对秸秆和种子产量的变异源不显著。两种杀菌剂均能有效降低疾病严重程度;但在提高秸秆产量和种子产量方面,硫的作用优于贝利斯。因此,采用线性回归分析确定农艺或技术性状与白粉病严重程度(PMS)之间的关系。施用杀菌剂后,各性状均与PMS呈显著负相关,说明在PMS较高的亚麻品种上防治晚白粉病具有重要的经济意义。
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