四霉素与嗯霉灵混配制剂对水稻立枯病的防治效果

摘要

Rice is the largest grain crop in China.In order to effectively control rice blight and reduce the use of chemical pesticides,the screening of mixed preparation of pesticides was carried out;Through indoor different proportions of hymexazol and tetramycin mixture of antimicrobial tests and field control experiments,an effective control of rice blight of tetramycin and hymexazol mixed formulations was screened out,tetramycin and hymexazol active ingredient ratio was 0.15:2.5,the co-toxicity coefficient of 139.03,with significant synergistic effect;When the field applied dose was at 33.13-39.75 g/hm2,the field control effect reached as much as 73.30％;The results showed that tetramycin and hymexazol mixed with a certain percentage can effectively control rice blight,effectively reduce the use of chemical pesticides.%水稻是我国第一大粮食作物,为有效防治水稻立枯病并减少化学农药的使用量,进行了农药混配制剂的筛选.通过室内不同比例的嗯霉灵与四霉素混配抑菌试验及田间防治试验,筛选出能有效防治水稻立枯病的四霉素与噁霉灵混配制剂,四霉素与嗯霉灵有效成分比例为0.15:2.5,共毒系数为139.03,增效作用明显;当田间使用剂量为33.13～39.75 g/hm2时,田间防效达到73.30％.试验结果表明,四霉素与噁霉灵按一定比例混配可以有效防治水稻立枯病,有效减少化学农药的使用量.