Fusarium graminearum and Exserohilum turcicum (Pass) Leonard were relatively less sensitive to S2 with EC50 values all above of 200mg/L;

• 天明精内酯酮对小麦白粉病和黄瓜白粉病、玉米大斑病均具良好防效；1000mg/L对3种病害的盆栽保护和治疗效果均在55.；5%25以上;