稻田稗草对丁草胺和二氯喹啉酸的两种抗性测定方法比较

Comparing to the identification methods of barnyardgrass(Echinochloa crusgalli) resistance to butachlor and quinclorac in rice fields

利用种子培养皿滤纸法和盆钵土培法分别对广东省14个稗草生态型对丁草胺和二氯喹啉酸的抗性趋势进行测定。结果表明,对于丁草胺,两种抗性检测方法测定出的抗性水平相差最大的两种稗草生态型均是惠州龙门和佛冈烟岭,说明种子培养皿滤纸法可以作为检测稗草对丁草胺抗性程度的快速便捷方法之一;而对于二氯喹啉酸,两种方法测定结果不一致,故仍需采用整株茎叶喷雾法检测稗草对其抗性水平。

In this paper,the resistance trends of the fourteen barnyardgrass biotypes,which collected from rice fields in Guangdong province,to butachlor and quinclorac were compared by two different methods： seed bioassay and pot assay.Results showed that a good correlation between the two different bioassay in terms of barnyardgrass resistance to butachlor,Huizhou Longmen and Fogang Yanling biotypes were the most resistant and susceptible biotypes.So results suggested that seed bioassay can be a method to identify conveniently the resistant level of barnyardgrass to butachlor.However,identification of barnyardgrass resistance to quinclorac still needs whole plant pot method because of disagreement of the two different bioassay.