吡虫啉片剂壁材对缓释速率的影响及其防治白粉虱效果分析  

The Analysis of Wall Material of Imidacloprid Tablet on Slow-released Speed and Control Effect against Whitefly

作　　者：王远宏[1] 杨玲[2] 常若葵[3] 李宁[1] 王学利[1] 

机构地区：[1]天津农学院园艺系,天津300384 [2]农业部农产品质量安全中心,北京100081 [3]天津农学院机电系,天津300384

出　　处：《农药》2012年第9期658-661,共4页Agrochemicals

基　　金：国家星火科技项目(2011GA610014);天津星火科技项目(10ZHXHNC08300)

摘　　要：[目的]探讨囊化壁材对吡虫啉缓释片剂缓释速率的影响。[方法]经机械搅拌、化学交联、烘干、造粒、压片等工艺措施,分别以淀粉和β-环糊精为壁材制备了2种缓释剂片剂CS(淀粉为壁材)和CD(β-环糊精为壁材)。采用温室防效、模拟土壤pH值以及片剂对番茄植株生长的影响等试验。[结果]明确了最佳施用方式为在定植时用在植株根部正下方6 cm深度范围,最适土壤pH值为7;片剂CS和CD在第90天对白粉虱防效分别为90%和64%,对煤污病防效在107 d分别为96.8%和92.7%;在相应剂量内对植株生长有明显促进作用。[结论]CS片剂较CD片剂持效期长且缓释速率慢而均匀,以淀粉作为缓释壁材较好。[Aims] The impact of capsulated wall material on slow-released rate of imidacloprid-containing tablets was investigated. [Methods] By mechanical agitation, cross-linking, oven drying, granulation and pressing tablet, two slow-released tablets containing imidacloprid were made with corn starch（CS） and fl-cyclodextrin （CD） as wall materials. The effects of the tablets on tomato under greenhouse control and simulation of soil pH condition were evaluated. [Results] It showed best control effect when tomato seedlings were planted and tablets were applied 6 cm under the roots, and the optimal pH was 7. The control effect of CS and CD against whitefly was 90 and 64% at 90th day, respectively. And that of CS and CD against sooty mould was 96.8 and 92.7% at 107th day, respectively. When treated with CS and CD, the weight of seedling root, seedling plant and seedling height was higher than the control. [Conclusions] Results showed that the imidacloprid-released speed of CS was much even and slow and corn starch as wall capsule was more proper.

关 键 词：壁材 缓释 白粉虱 吡虫啉 

分 类 号：TQ450[化学工程—农药化工]