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农药桶混助剂的选择原理

作  者:
刘支前
单  位:
新西兰林业研究院
关键词:
桶混助剂;农药;表面活性剂;附着;展布;吸收
摘  要:
桶混助剂通过改善农药在植物叶面上的附着 ,展布或吸收而能够极大地提高药效 ,但并非任何助剂对任何农药均有效。如果说提高药液附着对所有农药均有利 ,那么获得卓越的药液展布性对保护性杀菌剂尤为重要。表面活性剂对农药叶面吸收的影响更复杂 ,与其亲水基及亲脂基结构以及浓度均有关系。因此选择桶混助剂时 ,既要考虑农药本身的理化性质 ,又要考虑靶标植物的叶片表面特征
译  名:
Principles for Selecting Tank-mix Adjuvants
作  者:
Liu Zhiqian (New Zealand Forest Research Institute,Rotorua,New Zealand)
关键词:
tank-mix adjuvants, pesticides, surfactants, retention, spreading, uptake.
摘  要:
Tank-mix adjuvants can greatly improve pesticide efficacy through increasing spray droplet retention, spreading or uptake of active ingredients.However, not any adjuvants can enhance the performance of any pesticide.While improving spray retention is always desirable for foliage-applied pesticides, extensive droplet spread is most important for protective fungicides.The effect of surfactants on the uptake of pesticides depends on the structure (hydrophobe and hydrophile moieties) and concentration of the surfactants.So both the properties of a.i.'s and the leaf surface characters of plant species need to be considered in selecting a tank-mix adjuvant.

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