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中国农学通报

中国农学通报 ›› 2009, Vol. 25 ›› Issue (24): 364-368.

所属专题： 植物保护

• 植物保护 农药 • 上一篇    下一篇

绿色农药分散剂GCL4-1的结构特征及应用性能研究

尚纪兵,邱学青,欧阳新平,庞煜霞   

  • 收稿日期:2009-07-16 修回日期:2009-08-05 出版日期:2009-12-20 发布日期:2009-12-20
  • 基金资助:

    广东省自然科学基金项目;广东省国际合作项目

Research on structural characteristics and applied properties of green pesticide dispersant GCL4-1

  • Received:2009-07-16 Revised:2009-08-05 Online:2009-12-20 Published:2009-12-20

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摘要：

采用红外光谱、电位滴定、凝胶渗透色谱对改性木质素磺酸钠农药分散剂GCL4-1的分子结构进行了研究，结果表明，GCL4-1分子中磺酸基含量较改性前的木质素磺酸钠LS有明显提高，磺化度从改性前的1.33 mmol/g增加到1.96 mmol/g；其重均分子量为9700，数均分子量为2300。进一步研究了GCL4-1对农药水分散粒剂(WG)应用性能和药效等的影响，发现以GCL4-1作分散剂制备的WG具有良好的润湿性和崩解性，WG热贮前后的悬浮率都超过90%；WG悬浮液分散稳定性优良，2 h后的悬浮液沉淀层厚度仅为0.386 mm，颗粒粒径为7.22 μm。制得的80%烯酰吗啉WG防治黄瓜霜霉病的EC90值为58.32 mg/L，80%氟虫腈WG样品对小菜蛾的LC50值为0.5196 mg/L，室内毒力达到了国外同类制剂最好产品水平。GCL4-1的综合性能达到甚至超过Borregaard公司的Kinsperse126，是一种具有优良性价比的绿色农药分散剂。

关键词: 猪瘟病毒, 猪瘟病毒, E2基因, 克隆, 序列分析, 猪瘟病毒, E2基因, 克隆, 序列分析

Abstract:

Structural characteristics of modified sodium lignosulfonate GCL4-1 were investigated with infrared spectrum, potentionmetric titration and gel chromatography, Results showed that GCL4-1’s sulfonic group content was obviously increased compared with original sodium lignosulfonate LS, and its sulfonation degree was increased from original 1.33 mmol/g to 1.96 mmol/g; Weight and number average molecular weight of GCL4-1 were 9700 and 2300, respectively. Influence of GCL4-1 on the applied ?properties of pesticide water-dispersible granules (WG) were further studied, when GCL4-1 was used as dispersant, the suspension percentages of WG before and after heated storage were both above 90%; the dispersion had excellent stability, the phase thickness of suspension was only 0.386 mm after two hours and the particle size was 7.22 μm. The value of EC90 of 80% dimethomorph WG’s control of cucumber downy mildew was 58.32 mg/L, and the value of LC50 of 80% fipronil WG samples on diamondback moth was 0.5196 mg /L, which meaned the indoor toxicity of the two WGs reached the level of the best foreign similar products. The comprehensive property of GCL4-1 is better than Kinsperse126 of the Borregaard company, which shows that GCL4-1 is a green pesticide dispersant with good performance price ratio.