Effect of seed quality and combination fungicide-Trichoderma spp. seed treatments on pre- and postemergence damping-off in cotton
Effect of seed quality and combination fungicide-Trichoderma spp. seed treatments on pre- and postemergence damping-off in cotton
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DOI：
10.1094/phyto-97-0066
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发表时间：
2007-01-01
期刊：
影响因子：
3.2
通讯作者：
Howell, Charles R.
中科院分区：
文献类型：
--
作者：
Howell, Charles R.
棉花优质种子常能逃过腐霉引起的出苗前倒伏。和米根霉(Rhizopus Oryzae)，对立枯丝核菌(Rhizoctonia Solani)诱导的出苗后立枯病具有抗性。然而，质量差的种子对苗期病害的两个阶段都非常敏感，需要进行种子处理才能存活。腐霉(Pythium spp.)一些木霉生防制剂种子处理可有效防治水稻根霉，但对立枯丝核菌引发的出苗后病害的防治效果较差。杀真菌剂可以控制出苗后病害，但对出苗前阶段的防治效果较差。劣质棉种子与杀菌剂、木霉复合处理的研究。准备，然后在病原菌侵染的土壤中种植，表明这项技术将控制苗木病害的两个阶段。单独使用杀菌剂或生防剂处理种子不能实现这一目标。防治效果最好的组合是百菌清+木霉，其次是百菌清+甲霜灵(Deltakoat AD)+T virens菌株G-6。
Good quality seeds of cotton cultivars often escaped pre-emergence damping-off incited by Pythium spp. and Rhizopus oryzae, and they were resistant to postemergence damping-off incited by Rhizoctonia solani. Poor quality seeds, however, were highly susceptible to both phases of seedling disease and required seed treatment in order to survive. Preemergence damping-off incited by Pythium spp. and Rhizopus oryzae could be controlled by seed treatment with biocontrol preparations of a number of Trichoderma spp., but these treatments were much less effective in controlling postemergence disease incited by Rhizoctonia solani. Postemergence seedling disease can be controlled by fungicides, but they were much less effective in controlling the pre-emergence phase of the disease. Combination seed treatments of poor quality cotton seeds with fungicides and Trichoderma spp. preparations, followed by planting in pathogen-infested soil, indicated that this technique will control both phases of seedling disease. Seed treatment with either the fungicides or the biocontrol agents alone did not achieve this goal. The optimum combination treatment for disease control was that of chloroneb plus Trichoderma spp., followed by chloroneb plus metalaxyl (Deltacoat AD) plus T virens strain G-6.