辽宁省无芒稗对二氯喹啉酸的抗药性研究

Studies on Resistance of Echinochloa crusgalli(L.) Beauv.var. mistis(Pursh) Peterm to Quinclorac in Liaoning

对辽宁省稻区无芒稗对二氯喹啉酸抗药性进行研究,结果表明:辽宁省稻区的无芒稗对二氯喹啉酸都产生了一定程度的抗性,但抗性水平不高,抗性比值小于2的敏感性生物型14个,占37.83%,抗药性生物型23个,占62.17%,其中相对抗性比大于3的8个,占21.62%,高抗生物型的1个,占2.7%。

The resistance level of Echinochloa crusgalli （L.）Beauv. var. mistis （Pursh） Peterm biotypes collected from rice planting areas in Liaoning province was tested by agar method.The result showed that the resistance of Echinoehloa crusgalli （L.）Beauv. vat. mistis （Pursh） Peterm to quinclorac had been placed, but the level of resistance was not high. There were 14 biotypes with resistance ratio smaller than two, taking account of 37.83 percent in all the biotypes. The number of resistant biotypes was 23, which accounted for 62.17 percent. The resistance ratios of eight biotypes Were smaller than 3, accounting for 21.62 percent. There were only 1 high resistant biotype, accounting for 27 percent.