不同囊壁材料触破式微胶囊剂的药效及持效期

A Study on Pesticide Effects and Duration of Contacted Breaking Release Microcapsules with Different Wall Materials and Thickness

研究了以明胶－阿拉伯树胶和聚胺酯为囊壁材料，六种不同囊壁厚度的触破式微胶囊剂，对虫非蠊、松墨天牛、云斑天牛成虫的触破药效及持效期。结果表明：（１）明－氰－倍１号和聚－氰－倍１号，在野外自然环境喷施２２ｄ后，对虫非蠊的毒杀校正率仍达８０％。其药效和持效期远远高于相同浓度和剂量的乳油。（２）聚－氰－倍３号，喷施马尾松树上２６ｄ后，对松墨天牛成虫毒杀校正死亡率达７７．８％。（３）聚－氰－倍３号、４号、明－氰－倍２号，在喷施杨树干上２２ｄ后，对云斑天牛成虫毒杀校正死亡率达８０％；而其乳油在喷施第８天后，毒杀死亡率已下降到１０％。这说明触破式微胶囊剂具有抗环境能力强、持效期长，防治天牛成虫效果好等优点。

This paper deals with pesticide effects and duration of contacted_breaking release microcapsules with different wall thickness, prepared with compound pesticides, fenvalerate_fenthion (FF) and wall polymer, polyaminoresin (P), gelation_gum acacia (G), to Monochamus alternatus Hope、 Baocera horsfieldi (Hope)、 Blattella germanica (L.). Test resutls show that: Firstly Microcapsules PFF-1,GFF-1 maintained 80% mortality to B. germanica (L.) after 22days in field, higher than corresponding emusifiable concentrate (EC). Secondly after being sprayed on pine, PFF-3 lasted more than 26 days with 77.8% mortality to M. alternatus. Thirdly PFF-3、PFF-4、GFF-2 maintained more than 22 days with toxicity to B. horsfieldi after being sprayed on poplar stem, but the mortality of corresponding EC was lower than 10% after 8 days. These tests indicate that contacted_breaking microcapsules have some advantages, such as resistence to environmental factors, a long effect duration and a better effect on controlling the cerambycids adults etc.