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经1993～1995年生物测定和田间多点试验示范发现:①丙硫磷对稻瘟菌孢子萌发和附着胞形成有显著的抑制活性,EC_(50)为103.3mg/L,500mg/L的抑菌率达96.2％;②丙硫磷1000mg/L对水稻苗叶瘟和穗瘟的预防效果分别为79.4％和90.7％,治疗效果分别为39.3％和41.8％;③丙硫磷600～900g(ai,下同)/hm~2防治双季早稻和瓜后稻穗瘟病的田间小区效果分别为70.8％～80.2％和71.1％～77.2％;④丙硫磷750～900g/hm~2于水稻破口初期一次性用药,多点防治稻穗瘟和三化螟白穗的大区示范平均效果分别为62.5％～70.2％和96.9％～97.4％,显著高于对照处理“三环唑+杀虫双”的效果(分别为55.6％和91.0％)。
After 1993-1995 bioassay and field multi-point experiments showed that: (1) Elthion significantly inhibited the spore germination and attachment formation, the EC50 of 103.3mg / L, 500mg / L The rate of 96.2%; (2) the effect of lethion 1000mg / L on leaf blast and head blast of rice seedlings were 79.4% and 90.7%, respectively, and the therapeutic effects were 39.3% and 41.8% ai, the same below) / hm ~ 2 field control double crop early rice and post-melon rice blast in the field were 70.8% ~ 80.2% and 71.1% ~ 77.2% The average effect of one-off treatment in the early stage of the breach and the multi-point prevention and control of rice blast and rice stem borer white spike were 62.5% -70.2% and 96.9% -97.4%, respectively, significantly higher than that of the control Double effect "(55.6% and 91.0% respectively).