盾叶薯蓣褐斑病药剂防治试验研究

Experiment of Pesticides on Controlling Speckle Disease of Dioscorea zingiberensis C.H.Wright

目的 筛选盾叶薯蓣褐斑病防治的有效药剂及其对产量的影响。方法采取田间试验筛选，分别在2005，2006年，应用50％多菌灵WP，70％太白农甲托WP，70％代森锰锌WP、50％多菌灵WP＋磷酸二氢钾6kg／ha，70％太白农甲托WP＋磷酸二氢钾6kg／ha田间防治盾叶薯蓣褐斑病。结果70％太白农甲托WP＋磷酸二氢钾6kg／ha的防治效果最好，用量750～1500ml／ha（制剂用量），防效达87、2％～93、55％；50％多菌灵WP＋磷酸二氢钾6kg／ha次之，用量1125～1800g／ha，防效达81．05％～92．05％。结论 添加叶面微肥防治效果更好，且增产显著。

Objective To study the preventive effect of Dioscorea zingiberensis C. H. Wright on speckle disease, and also to analyze the economic benefit of increasing yield. Methods The method of farm experiment was adopted. Results The field trial was conducted in 2005 and 2006 on carbendazim 50% WP ,thiophanate - methyl 70% WP ,against speckle disease in Dioseorea zingiberensis C, H. Wright was carried out. The results showed that Thiophanate - Methyl 70% WP ＋ KH2PO4 6 kg/ha had the highest control effect,application 750 - 1500 ml/ha,the efficacy was 87.2% -93.55% ;carbendazim 50% WP ＋ KH2PO4 6 kg/ha was second, application t 1125 - 1800 g/ha, the efficacy was 8 1. 05 % -92. 05 % . Conclusion Appending minim fertilizer has much more control efficacy and can obviously increase production.