TBHQ对阿维菌素光解的影响及对灰飞虱的增效作用  

Effect of TBHQ on avermectin photo-degradation and its synergism on small brown planthopper

作　　者：徐广春[1] 顾中言[1] 徐德进[1] 许小龙[1] 范鹏[1,2] 

机构地区：[1]江苏省农业科学院植物保护研究所,南京210014 [2]扬州大学同艺与植物保护学院,扬州225009

出　　处：《中国生态农业学报》2010年第6期1306-1310,共5页Chinese Journal of Eco-Agriculture

基　　金：“十一五”国家科技支撑计划项目(2006BAD08A03-4);江苏省农业科技自主创新资金项目CX(09)615资助

摘　　要：为延缓阿维菌素的光解,研究了不同浓度抗氧化剂TBHQ对阿维菌素光解的影响,并通过稻茎浸渍法测定其与阿维菌素混用后对灰飞虱的毒力。结果表明:阿维菌素的光解行为符合化学反应一级动力学方程,阿维菌素在太阳光下的光解速率小于紫外光下的光解速率;在TBHQ抑制阿维菌素光解试验中,其与阿维菌素比值为1︰1时,阿维菌素的光解速率最小,光解半衰期为11.81h,比不添加TBHQ在紫外光下的光解半衰期延长167.19%。室内生物测定结果表明,TBHQ与阿维菌素混用后对灰飞虱表现为增效作用;经太阳光和紫外光光照3h后,加入TBHQ的阿维菌素对灰飞虱的毒力均显著高于未添加TBHQ的处理,增效比分别为2.00和2.63。To delay avermectin photo-degradation, the paper studied the effects of different concentrations of antioxidant, terliary butyl hydroqulnon （TBHQ）, on avermectin photo-degradation. The toxicity of avermectin and TBHQ mixture on small brown planthopper （SBPH） Laodelphax striatellus （Fallén） was also determined via rice-stem-dipping method. The results indicate that avermectin photo-degradation fits into the equation for first-order chemical reaction kinetics. Photolysis rate of avermectin photo-degradation under sunlight is slower than that under UV light. When TBHQ and avermectin ratio is 1︰1, photolysis rate is lowest for avermectin photo-degradation, and its half-life is 11.81 h. This is 167.19% increase compared with treatment without TBHQ. Laboratory bioassay results demonstrate that the synergistic effect of TBHQ and avermectin mixture on SBPH is significantly strong. After 3 h exposure to sunlight and UV light, the toxicity of avermectin and TBHQ mixture on SBPH increases significantly compared to that without TBHQ. The synergism ratio is 2.00 and 2.63, respectively.

关 键 词：阿维菌素 光解 毒力 灰飞虱 叔丁基对苯二酚 

分 类 号：X122[环境科学与工程—环境科学] S482.3[农业科学—农药学]