大蒜锈病（Ｐｕｃｃｉｎｉａａｌｌｉｉ（ＤＣ）Ｒｕｄｏｌｐｈ）１９９０～１９９３年在陕西关中部分大蒜生产区严重发生，调查研究结果表明，长期阴湿田块发病重，４、５月份的降水量增多，有利病害发展流行。田间防治试验结果表明，以２５％粉锈宁可湿性粉剂２００ｍｇ／ｋｇ，发病初期当病叶率、严重度均在５％以下时喷药防治效果最佳。 Garlic rust (Puccinia alliiii (Rudolph)) occurred in the garlic production area of ​​Guanzhong in Shaanxi Province from 1990 to 1993. The results of the investigation showed that the incidence of heavy rain was heavy in the long-term wet plots, and the precipitation in April and May increased. Field control test results show that 25% triadimencin WP 200mg / kg, early disease when the diseased leaf rate and severity are below 5% when spraying the best control effect.