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Transactions of the Chinese Society of Agricultural Engineering
2008,24
(2)
205-208
植物源农药印楝素微胶囊化工艺及防虫效果
作 者：
江定心;徐汉虹;杨晓云
单 位：
天然农药与化学生物学教育部重点实验室华南农业大学昆虫毒理研究室
关键词：
印楝素微胶囊;植物源农药;防虫效果;界面聚合法;生物活性
摘 要：
该试验采用界面聚合法,对植物源农药印楝素进行微胶囊化,并通过正交试验优化微胶囊制备的工艺条件,旨在提高印楝素的稳定性,延长其田间防虫持效期。结果表明:壁材采用3∶4(m∶m)的甲苯-2,4-二异氰酸酯(TDI)与六亚甲基四胺,芯材与壁材的配比为30∶7(m∶m),溶剂采用3∶2(m∶m)的乙酸乙酯和二甲苯混合溶剂比效适宜,微胶囊中印楝素的包埋率为(83.16±1.22)%。所制得的印楝素微胶囊剂通过盆栽试验表明,对昆虫具有较好的防治效果和较长的持效期。
译 名：
Technology for microencapsulations of botanical pesticide azadirachtin and its insecticidal effect
作 者：
Jiang Dingxin,Xu Hanhong,Yang Xiaoyun(Key Laboratory of Natural Pesticide and Chemical Biology,Ministry of Education,Laboratory of Insect Toxicology,South China Agricultural University,Guangzhou 510642,China)
关键词：
azadirachtin microencapsulation;botanical pesticide;insecticidal effect;interfacial polymerization;bioactivity
摘 要：
The botanical pesticide azadirachtin was microencapsulated using interfacial polymerization.The technical conditions for azadirachtin microencapsulation were optimized by orthogonal experiment.Results show that the encapsulating yield of azadirachtin reaches(83.16 ± 1.22)% under the following conditions: the ratio of toluene-2,4-diisocyanate(TDI) to hexamethylenetetramine was 3︰4(m∶m) as the wall materials,the proportion of azadirachtin dry powder to wall materials was 30︰7(m∶m),the ratio of ethyl acetate to xylene was 3︰2(m∶m) as solvent,respectively.Pot culture experiment shows that the microencapsulated azadirachtin has good insecticidal effects with bioactivity and a long effective duration.
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