低剂量吡虫啉对异色瓢虫的Hormesis效应及其抗氧化酶活性的影响  

Hormetic effect of imidacloprid on Harmonia axyridis and impact on the antioxidant enzyme activity

作　　者：赵明[1] 沈国清[2] 陆贻通[2] 余月书[3] 

机构地区：[1]扬州大学园艺与植物保护学院,江苏扬州225009 [2]上海交通大学农业与生物学院/农业部都市农业(南方)开放重点实验室,上海200240 [3]上海应用技术学院,上海201418

出　　处：《扬州大学学报（农业与生命科学版）》2012年第4期77-80,102,共5页Journal of Yangzhou University：Agricultural and Life Science Edition

基　　金：上海市博士后基金资助项目(09R21413400);上海市重大科技攻关项目(08DZ1900404)

摘　　要：以瓢虫为研究对象,研究低剂量吡虫啉对瓢虫控害效能及其抗氧化酶活性的影响。结果表明:低剂量吡虫啉(0.01、0.1、0.2、1mg.kg-1)能显著提高瓢虫的捕食量及相对活力,从而增强其控害效能。药后48h,低剂量吡虫啉可诱导瓢虫捕食量的Hormesis效应。在吡虫啉胁迫下异色瓢虫抗氧化酶活性变化明显,瓢虫体内超氧化物歧化酶、谷胱甘肽过氧化物酶活性无显著变化,而处理后24、72h,过氧化氢酶活性显著下降。该研究结果对害虫综合治理具有实践意义,有助于进一步了解Hormesis效应的产生机理。Hormesis, a phenomenon characterized by a low dose stimulation and high dose inhibition, is a hot research area. Effect of the antioxidant enzyme activity and the pest-controlling efficacy of the low dose of imidacloprid on Harmonia axyridis were studied. Result indicated that the amount of ladybird predation and relative activity increased signifi- cantly, and enhanced the pest-controlling efficacy of H. axyridis, at the treatment of the low dose imidacloprid （0. 01, 0. 1, 0.2, 1 mg .kg 1 ）. The hormetic effect of imidacloprid on the amount of predation of H. axyridis was induced at the 48 hour （h） after treatment. Result from activity of the antioxidant enzyme showed that there were not significant difference between the treatment and control （CK） about the activities of SOD and GSH-Px. But, the activity of CAT decreased at 24 and 72 h after treatment. Result from this study is helpful to understand the mechanism of Hormesis, and the integrated pest management.

关 键 词：吡虫啉 抗氧化酶 控害效能 低剂量刺激效应 

分 类 号：S433.5[农业科学—农业昆虫与害虫防治]