寒地稻区几种杀菌剂对稻瘟病的防效研究初报

为了做好寒地稻区稻瘟病的防治工作,挑选适合防治稻瘟病的药剂;选用40%富士一号乳油、25%使百克乳油、三碘水剂、4%春雷霉素可湿性粉剂、50%杀菌成可溶性粉剂、水稻瘟毒净六种药剂,采用室内稻瘟病菌生长抑制法和田间防效相结合进行了药剂筛选。结果表明：40%富士一号乳油1000倍、800倍,25%使百克乳油1200倍、800倍,50%杀菌成可溶性粉剂1200倍、600倍,水稻瘟毒净1500倍的抑制率均达到100%,对稻瘟病菌均有很强的抑制作用。田间药效试验,40%富士一号乳油防效为56.1%;70.4%,25%使百克乳油防效为38.7%;48.1%;因此40%富士一号乳油和25%使百克乳油是防治稻瘟病可供选择的良好药剂,可在生产上应用。

Study on Control Effect of Several Common Fungicides to Rice Blast in Cold Region

Select several common fungicides to rice blast in order to control of rice blast in cold region. The six common fungicides of 40 % isoprothiolane EC, 25 %prochloraz EC, alginic acid. AS, 4 % kasugamycin WP, 50 % chlorobromoisocyanuric acid TM and 3% jinggangmycin were selected to test agaist Pyricularia grisea and their efficiency was compared by field trial. The results showed： 40 % isoprothiolane EC with the fungicides times of 1 000 and 800,25 % prochloraz EC with 1 200 and 800,50 % chlorobromoisocyanuric acid TM with 1 200 and 600, 3 % jinggangmycin with 1 500 had 100 % inhibiting rates and they inhibited better effect to rice blast. The effect of 40% isoprothiolane EC and 25% prochloraz EC were the 56.1%-70.4% and 38.7%-48. 1% in the field testing. They were the effective pesticides against rice blast and could be applied in the field.