6种病毒抑制剂对西藏青稞上大麦黄矮病的防治效果

通过田间小区试验,开展了6种病毒抑制剂对西藏青稞上大麦黄矮病防治效果的研究。采用带毒蚜虫人工接种法,于青稞起身拔节期每株接种10~15头带毒麦长管蚜,7 d后灭蚜,灭蚜后3 d喷施病毒抑制剂,在成株期出现黄矮病症状后调查病株率、病情指数、防治效果,以及长势和产量。结果表明,6种病毒抑制剂对青稞上大麦黄矮病有不同程度的防治效果,其中6%寡糖·链蛋白WP、0.5%香菇多糖AS和8%宁南霉素AS防治效果分别为65.38%、52.41%和50.11%;处理后的青稞有不同程度的增产,其中6%寡糖·链蛋白WP、0.5%香菇多糖AS和40%烯·羟·吗啉胍SP处理增产率分别为78.44%、53.22%、27.42%。综合本文结果表明,6%寡糖·链蛋白WP、0.5%香菇多糖AS对西藏大麦黄矮病有较好的防治效果和增产率。

Control efficacy of six plant virus inhibitors on barley yellow dwarf disease in Tibet

Control efficacy of six plant virus inhibitors on barley yellow dwarf disease of highland barley were evaluated in Tibet. The experiments were carried out to inoculate Barley yellow dwarf virus to the highland barley leaves at the stage of standing to jointing with viruliferous aphids (Sitobion miscanthi). Each plant was inoculated with 10 to 15 viruliferous aphids. Aphids were killed with imidacloprid 10% WP seven days after inoculation, and all plants were sprayed three days later with plant virus inhibitors. Investigation of disease index, growth, and yield showed that six plant virus inhibitors have different degrees of control effect on barley yellow dwarf disease of highland barley. When treated by oligosaccharins·plant activator protein 6% WP, fungous proteoglycan 0.5% AS, and ningnanmycin 8% AS, the control efficacies on barley yellow dwarf disease were 65.38%, 52.41% and 50.11%, respectively. Compared with water treatment, the increase rate of barley yields were 78.44%, 53.22% and 27.42%, respectively, when treated by oligosaccharins·plant activator protein 6% WP, fungous proteoglycan 0.5% AS, and enadenine·oxyenadenine·moroxydine hydrochloride 40% SP. The above results indicate that oligosaccharins·plant activator protein 6% WP and fungous proteoglycan 0.5% AS have good control effect on barley yellow dwarf disease in Tibet.