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Management of Seed Borne Pathogens (Fungi) of Maize

机译:玉米种子出生病原体(真菌)的管理

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Management of seed mycofiora was studied by different seed treatment methods viz., physical, chemical and biological methods. By physical methods, seeds treated with hot water at 45°C for 25 and 30 min. and at 50°C for 10,15,20,25 and 30 minutes reduced seed mycofiora, but adversely affected seed germination. However, maximum seed germination was recorded when seeds were treated at 40°C for 30 minutes and this treatment also reduced seed mycofiora effectively. In dry heat treatment, seed treatmentat 50°C for one hour effectively reduced the seed mycofiora, but adversely affected seed germination. However, dry Heat treatment at 40°C for one hour reduced the seed mycofiora without affecting seed germination. In solar heat treatment, seeds exposed to solar heat treatment at 12-14 h on terrace effectively reduced the seed mycofiora followed by 13-15 h, 14-16 h, 12-13 h, 13-14 h, 14-15 h and 15-16 h. Seed treatment with fungicides viz., carbendazim, thiophanate methyl, captan, mancozeb and chlorothalonil at the rate of 2 and 3 g per kg of seed effectively eliminated seed mycofiora. The maximum seed germination of 90 per cent was recorded when seeds were treated with carbendazim @ 2 and 3 g per kg of seed. In seed treatment with bioagents viz., Trichoderma viride, T. harzianum, P. fluorescens and Bacillus subtilis, seed mycofiora was significantly reduced when maize seeds were treated with T. harzianum and T. viride at 6 g per kg of seed, whereas maximum seed germination of 92 per cent was recorded when seeds were treated with T. viride and P. fluorescens at 6 g per kg of seed.
机译:通过不同的种子处理方法,即物理,化学和生物学方法,研究了种子霉菌的管理。通过物理方法,将种子在45°C的热水中处理25和30分钟。在50°C下持续10、15、20、25和30分钟,可减少种子霉菌菌丝的产生,但会对种子发芽产生不利影响。然而,当种子在40°C下处理30分钟时,记录到最大的种子发芽,并且这种处理还有效地降低了种子霉菌病。在干热处理中,将种子在50°C下处理1小时可有效减少种子霉菌菌丝,但会对种子发芽产生不利影响。但是,在40°C下干热处理一小时可减少种子霉菌丝,而不影响种子发芽。在太阳热处理中,在露台上于12-14 h接受太阳热处理的种子有效地降低了种子霉菌毒素,随后分别降低了13-15 h,14-16 h,12-13 h,13-14 h,14-15 h和15-16小时用每公斤种子2 g和3 g的杀真菌剂(多菌灵,甲基多菌灵,甲基硫丹,硫丹,代森锰锌和百菌清)进行种子处理可有效消除种子霉菌。当使用多菌灵@ 2和3 g / kg种子处理种子时,记录的最大种子发芽率为90%。在用生物剂,即木霉,里氏木霉,哈茨木霉,荧光假单胞菌和枯草芽孢杆菌进行种子处理时,以每公斤种子6 g的哈茨木霉和里氏木霉处理玉米种子时,种子真菌感染显着降低,而最大值当以每公斤种子6 g的三叶草和荧光假单胞菌处理种子时,种子发芽率达到92%。

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