论文部分内容阅读
采用10%溴氰虫酰胺可分散油悬浮剂(OD),按有效成分75g/hm~2的剂量,于香蕉抽蕾初期施药1次,比较了喷雾、灌根和埋药3种施药方式下溴氰虫酰胺对黄胸蓟马的防效,并通过超高效液相色谱-串联质谱法(UPLC-MS/MS),分析了溴氰虫酰胺在香蕉果实、花瓣及土壤中的消解动态和最终残留。药效试验表明:喷雾法与灌根法对黄胸蓟马均具有良好的防治效果,防效分别为78%和74%,而埋药处理的防效较差,仅18%。残留检测结果表明:喷雾和灌根处理组,溴氰虫酰胺在果实、花瓣和土壤中的残留消解半衰期分别为6.5、14.0、8.5d和16.0、5.7、8.0 d;在香蕉收获前7d采样,果实中未检测到溴氰虫酰胺残留,其在土壤中残留量为0.028 mg/kg。研究表明,采用喷雾与灌根法施用溴氰虫酰胺可有效防治香蕉田黄胸蓟马,且其在香蕉上使用较安全,属于易降解性农药。
10% bromoxetane dispersible oil suspending agent (OD) was used. The effective dose of 75g / hm ~ 2 was applied in the early stage of the pumpkin bud extraction. The spraying, irrigation and embedding were compared Mode was used to control the toxicity of Brometamide to Thrips tabaci (Thrips tabaci), and the digestion of Bromethazine in banana fruits, petals and soil was analyzed by UPLC-MS / MS Dynamic and final residue. The efficacy tests showed that both spray and root-filling methods had good control effects on Thrips tabaci, with control effects of 78% and 74%, respectively, while the burying effect was poor (only 18%). Residue test results showed that the half-lives of residues of bromoxetane in fruits, petals and soil were 6.5, 14.0, 8.5d and 16.0, 5.7, 8.0d respectively in spraying and irrigating treatment groups; sampling 7d before harvest of banana, No bromothiramide residue was detected in the fruit and its residual amount in the soil was 0.028 mg / kg. Studies have shown that the spray and irrigation root application of bromothrin amide can be effectively controlled Banana field thrips, and its safer to use on bananas, is a biodegradable pesticide.