40%嘧霉胺SC防治番茄灰霉病田间药效试验

Field Efficacy of Pyrimethamil 40% SC against Tomato Gray Mold

田间药效试验结果表明,用40%嘧霉胺SC800倍液防治番茄灰霉病,对叶片和果实的防效分别为90.1%和85.2%,显著高于对照药剂50%腐霉利WP1000倍液的防效。在稀释800￣1200倍的情况下,防治效果可达85%￣90%左右,对作物安全。

In controlling tomato gray mold (caused by Botrytis cinerea Pers.) in the field, pyrimethamil 40% SC at a 1:800 dilution provided 90.1 and 85.2% protection of leaves and fruits, respectively. These results were significantly better than the protection provided by procymidone 50% WP at a 1:1000 dilution. At dilutions of 800 to 1200, pyrimethamil provided 85 to 90% protection with good crop safety.