烟田农药有效利用率的喷雾法研究

摘要

In order to improve pesticide efficacy in tobacco field, three vaporizers for the evaluation of pesticide spray distribution were compared using food dye of Allura Red as tracer.The results indicated that, the absorbance peak for Allura Red at 501nm.In sunlight after 2-6 hours, the decomposition rates were between 2.1％-3.4％, so that it is stable in sunlight.The recovery rates on tobacco and glasses were very high, so it is quite feasible as tracer to measure the pesticide spray distribution of volume spay.Compared to hand sprayer, spray volume reduced 20％ by using electrostatic spray, and effective utilization rate increased 0.8 times.Adding Silwet the effective utilization rate increased by 1.07 to 1.19 times.The field application showed that after 7 d the corrected control efficacy to Myzus persicae were more than 97％.%为提高烟田农药有效利用率,以食品染色剂诱惑红作示踪剂,添加Silwet喷雾助剂,研究了3种喷雾方法喷雾后药液田间的沉积分布及对烟蚜的防治效果.结果表明,诱惑红最大吸收波长501 nn,光照26h,分解率2.1%3.4%,见光稳定性良好;在烟叶和培养皿上的洗脱回收率高,可作示踪剂测定喷雾过程中药液在烟田的沉积分布.与手动喷雾器相比,采用静电喷雾法,药液量减少20%,农药有效利用率提高0.8倍;加入Silwet后,农药有效利用率为原来的1.071.19倍,7d后对烟蚜防治效果均在97%以上.