海南省冬瓜炭疽病菌对嘧菌酯的敏感基线及抗药性监测

摘要

This experiment investigated the morbidity situation ofColletotrichum orbicularein 11 cities and counties of Hainan Province and tested the sensitivity of collected bacterial strains on azoxystrobin. The result indicated that wax gourd from each investigation spot was damaged by anthracnose in different degree. There were bigger differences in sensitivities to azoxystrobin among 89 wax gourd anthracnose infected strains. The average EC50value was(42.4853±29.7620)μg mL-1. The biggest EC50 value was DS3-7 from Danzhou,reaching 129.1351 μg mL-1;and the smallest EC50 value was LB3-14 from Lingao,reaching only 0.6714 μg mL-1. Among 89 wax gourd anthracnose infected strains,8 strains were low resistant to azoxystrobin,74 strains were moderate resistant to azoxystrobin,and 7 strains were high resistant to azoxystrobin.%对海南省11个市(县)冬瓜炭疽病的发病情况进行调查,并采用生长速率法测定89个冬瓜炭疽病菌菌株对嘧菌酯的敏感性.结果表明,各调查点冬瓜均受到不同程度的炭疽病为害;89个冬瓜炭疽病菌菌株对嘧菌酯的敏感性差异较大,平均EC50值为(42.4853±29.7620)μg mL-1;EC50最大值是儋州的DS3-7菌株,高达129.1351μg mL-1;EC50最小值是临高的LB3-14菌株,仅为0.6714μg mL-1;89个冬瓜炭疽病菌菌株中,共有嘧菌酯低抗菌株8株,中抗菌株74株,高抗菌株7株.