The resistance and cross-resistance of Scirpus juncoides Roxb.to ALS-inhibiting herbicides were tested to provide theoretical basis for effectively control Scirpus juncoides Roxb.and rational use of herbicides.To iden...The resistance and cross-resistance of Scirpus juncoides Roxb.to ALS-inhibiting herbicides were tested to provide theoretical basis for effectively control Scirpus juncoides Roxb.and rational use of herbicides.To identify the resistance and crossresistance of 19 populations from nine areas in Heilongjiang Province to four ALS-inhibiting herbicides by agar method and the whole-plant assay.The results are as the followings,the two bioassay methods had good correlation,the resistance indexes in the same area were different by two means,but resistant level was the same,similarity up to 89.5%.The resistant rates to pyrazosulfuronethyl,bensulfuron-methyl,penoxsulam and pyribenzoxim were 26.3%,36.8%,36.1%and 21.1%,respectively.Shangzhi populations evolved the highest level of resistance to pyrazosulfuron-methyl with a resistance index of 15.56.Shangzhi,Tonghe,Fangzheng and Jixi populations showed cross-resistance to four ALS-inhibiting herbicides,accounting for 26.3%.The resistance of Scirpus juncoides Roxb.to four ALS-inhibiting herbicides in Heilongjiang paddy field was low to moderate,five populations showed cross-resistance to four ALS-inhibiting herbicides.展开更多
为明确安徽省小麦赤霉病菌主要致病菌禾谷镰孢菌复合种(Fusarium graminearum species complex)对氟唑菌酰羟胺的抗性现状,以5μg/mL的氟唑菌酰羟胺为抗性检测的区分剂量,对2024年采自安徽省10个地市的6900株小麦赤霉病菌进行抗性检测,...为明确安徽省小麦赤霉病菌主要致病菌禾谷镰孢菌复合种(Fusarium graminearum species complex)对氟唑菌酰羟胺的抗性现状,以5μg/mL的氟唑菌酰羟胺为抗性检测的区分剂量,对2024年采自安徽省10个地市的6900株小麦赤霉病菌进行抗性检测,并检测抗性菌株的突变基因型和产毒化学型,比较抗、感菌株群体的生存适合度及其对其他常用杀菌剂(氟吡菌酰胺、多菌灵、戊唑醇和氰烯菌酯)的敏感性。结果表明:6900株小麦赤霉病菌中共检测出30株氟唑菌酰羟胺抗性菌株,总抗性频率为0.43%,所有抗性菌株的琥珀酸脱氢酶C_(1)亚基(SdhC_(1))发生了A83V的氨基酸突变;田间抗性菌株的产毒化学型均为雪腐镰孢菌烯醇(NIV)型;田间敏感群体较田间抗性群体致病性强,但两者菌丝生长速率和产孢能力无显著差异;氟唑菌酰羟胺与同作用机制杀菌剂氟吡菌酰胺间存在交互抗性,与多菌灵、戊唑醇和氰烯菌酯等其他类型杀菌剂间均不存在交互抗性。研究表明,安徽省部分小麦产区已出现赤霉病菌对氟唑菌酰羟胺的抗性群体,预测长期单一使用氟唑菌酰羟胺防治小麦赤霉病具有较高的抗性风险。研究结果可为该药剂的抗性风险治理及在生产中的合理使用提供参考。展开更多
基金Supported by the National Key Research and Development Program of China(2017YFD0200307)
文摘The resistance and cross-resistance of Scirpus juncoides Roxb.to ALS-inhibiting herbicides were tested to provide theoretical basis for effectively control Scirpus juncoides Roxb.and rational use of herbicides.To identify the resistance and crossresistance of 19 populations from nine areas in Heilongjiang Province to four ALS-inhibiting herbicides by agar method and the whole-plant assay.The results are as the followings,the two bioassay methods had good correlation,the resistance indexes in the same area were different by two means,but resistant level was the same,similarity up to 89.5%.The resistant rates to pyrazosulfuronethyl,bensulfuron-methyl,penoxsulam and pyribenzoxim were 26.3%,36.8%,36.1%and 21.1%,respectively.Shangzhi populations evolved the highest level of resistance to pyrazosulfuron-methyl with a resistance index of 15.56.Shangzhi,Tonghe,Fangzheng and Jixi populations showed cross-resistance to four ALS-inhibiting herbicides,accounting for 26.3%.The resistance of Scirpus juncoides Roxb.to four ALS-inhibiting herbicides in Heilongjiang paddy field was low to moderate,five populations showed cross-resistance to four ALS-inhibiting herbicides.
文摘为明确安徽省小麦赤霉病菌主要致病菌禾谷镰孢菌复合种(Fusarium graminearum species complex)对氟唑菌酰羟胺的抗性现状,以5μg/mL的氟唑菌酰羟胺为抗性检测的区分剂量,对2024年采自安徽省10个地市的6900株小麦赤霉病菌进行抗性检测,并检测抗性菌株的突变基因型和产毒化学型,比较抗、感菌株群体的生存适合度及其对其他常用杀菌剂(氟吡菌酰胺、多菌灵、戊唑醇和氰烯菌酯)的敏感性。结果表明:6900株小麦赤霉病菌中共检测出30株氟唑菌酰羟胺抗性菌株,总抗性频率为0.43%,所有抗性菌株的琥珀酸脱氢酶C_(1)亚基(SdhC_(1))发生了A83V的氨基酸突变;田间抗性菌株的产毒化学型均为雪腐镰孢菌烯醇(NIV)型;田间敏感群体较田间抗性群体致病性强,但两者菌丝生长速率和产孢能力无显著差异;氟唑菌酰羟胺与同作用机制杀菌剂氟吡菌酰胺间存在交互抗性,与多菌灵、戊唑醇和氰烯菌酯等其他类型杀菌剂间均不存在交互抗性。研究表明,安徽省部分小麦产区已出现赤霉病菌对氟唑菌酰羟胺的抗性群体,预测长期单一使用氟唑菌酰羟胺防治小麦赤霉病具有较高的抗性风险。研究结果可为该药剂的抗性风险治理及在生产中的合理使用提供参考。
