生物安全学报（中英文）2025，Vol.34Issue(4)：369-376,8.DOI:10.3969/j.issn.2095-1787.20240144
3种杀虫剂对福建省不同地区小菜蛾的防治效果
Effect of three insecticides on controlling Plutella xylostella in different areas of Fujian Province
摘要
Abstract
[Aim]This study aims to clarify the use of insecticides in the control of Plutella xylostella in different areas of Fujian Province,understand the resistance of P.xylostella to conventional insecticides,and provide a scientific basis for the pest control of local vegetables.[Method]Field experiments were carried out to test the control effects of three insecticides[1.6%avermectin Ba-cillus thuringiensis(Bt)SC,5%avermectin EC,8 000 IU·μL-1 Bt SC]on P.xylostella attacking Brassica oleracea in Minhou County of Fuzhou City,Pingnan County of Ningde City,Shunchang County of Nanping City,and Zhangpu County of Zhangzhou Cit-y.[Result]On days 1,3,and 7 after 1.6%avermectin Bt SC application,the control effect of low:0.112 mL·m-2,medium:0.15 mL·m-2,high:0.19 mL·m-2 concentrations against DBM progressively increased with the concentration.The control effects of the three insecticides increased gradually over time.The high concentration treatment of 1.6%avermectin Bt SC demonstrated su-perior control efficacy compared to 5%avermectin EC.The medium concentration treatment of the 1.6%avermectin Bt SC formula-tion showed control efficacy equivalent to that of the 5%avermectin EC.Meanwhile,the low concentration treatment of the 1.6%avermectin Bt SC provided control efficacy comparable to that of 8 000 IU·μL-1 Bt SC.The control effects of 1.6%avermectin Bt SC at high and medium concentrations and 5%avermectin EC were significantly higher than that of 8 000 IU·μL-1 Bt SC.In gener-al,the field control effects of the three insecticides on P.xylostella in Pingnan County and Minhou County were higher than those in Zhangpu County and Shunchang County.The three insecticides showed slow-acting properties(1 d control effect).One day after treatment,none of the three insecticides controlled P.xylostella below the economic threshold in the four counties.Seven days after treatment,all the three insecticides controlled P.xylostella below the economic threshold and had good lasting effects in Minhou County and Shunchang County.The field control effects in 7 days ranged from 77%to 89%in the four counties.[Conclusion]P.xy-lostella attacking B.oleracea has low sensitivity to avermectin,Bt,and their combination in the four counties of Fujian Province.It is suggested to use medium and high concentrations of 1.6%avermectin Bt SC in production.关键词
小菜蛾/杀虫剂/防效/速效性/持效性Key words
Plutella xylostella/insecticide/control effect/fast-acting property/durability引用本文复制引用
田厚军,林硕,孙莉,朱育菁,赵建伟..3种杀虫剂对福建省不同地区小菜蛾的防治效果[J].生物安全学报（中英文）,2025,34(4):369-376,8.基金项目
福建省人民政府和中国农业科学院"5511"协同创新工程(XTCXGC2021017、XTCXGC2021011) （XTCXGC2021017、XTCXGC2021011）
