Chinese Journal OF Rice Science

Chinese Journal OF Rice Science >

2010 , Vol. 24 >Issue 5: 503 - 508

DOI: https://doi.org/10.3969/j.issn.1001-7216.2010.05.010

研究报告

Action Analysis of Drops of EmamectionBenzoate Microemulsion on Rice Leaf

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  • 1Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China; 2College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China; *Corresponding author, E-mail: guzy@jaas.ac.cn

Received date: 1900-01-01

  Revised date: 1900-01-01

  Online published: 2010-09-10

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Abstract

Surface tension and spreading characteristics of drops of 0.5% emamectionbenzoate microemulsion(ME) on rice leaf were studied at concentrations of 0.78-12.50 mg/L. Results showed that the surface tensions of emamectionbenzoate ME at 156, 312, 625 and 1250 mg/L were smaller than the critical surface tension of rice leaf. The contact angles of the drops of these solutions were different when the drops were dropped onto rice leaf. However, as time went on, the contact angle diminished, and the diminishing speed increased with rising concentration. Finally, the drops that the surfactant reached the CMC (critical micelle concentration) in these solutions at 312, 625 and 1250 mg/L spread completely, whereas the drops that the surfactant did not reach the CMC in the solution at 156 mg/L could not spread completely. The surface tensions of emamectionbenzoate ME were smaller than the critical surface tension of rice leaf at 156-100 mg/L while the surface tension of the same concentration of emamectionbenzoate emulsifiable concentrate(EC) were greater than the critical surface tension of rice leaf, and the dynamic retention of the former on rice leaf was significantly greater than the latter. Pot experiment showed that under the same concentration, emamectionbenzoate ME showed an improved protecting effect on Chilo suppressalis compared to emamectionbenzoate EC. It testifies that micro emulsion could improve physical and chemical properties of the agents from the perspective of efficacy.

Key words： solution; surface tension; spreading; dynamic retention; insecticide efficacy trial

Cite this article

FAN Peng,GU Zhong-yan,XU De-jin,XU Xiao-long,XU Guang-chun . Action Analysis of Drops of EmamectionBenzoate Microemulsion on Rice Leaf[J]. Chinese Journal OF Rice Science, 2010 , 24(5) : 503 -508 . DOI: 10.3969/j.issn.1001-7216.2010.05.010

References

[1]胡美英, 黄炳球, 肖整玉. 表面活性剂对杀虫剂的增效机制及药效研究.华南农业大学学报, 1998, 19(3): 41-46.
[2]屠豫钦.农药剂型和制剂与农药的剂量转移. 农药学学报,1999, 1(1): 1-6.
[3]顾中言, 许小龙, 韩丽娟. 一些药液难在甘蓝、水稻和小麦表面润湿展布的原因分析.农药学学报, 2002, 4(2): 75-80.
[4]Wirth W, Storp S, Jacobsen W. Mechanism’s controlling leaf retention of agricultural spray solutions. Pesticide Sci, 1991, 33: 411-420.
[5]Holloway P J, Ellis M C B, Webb D A, et al. Effects of some agricultural tank-mix adjuvants on the deposition efficiency of aqueous sprays on foliage.Crop Prot, 2000, 19(1): 27-37.
[6]刘程, 张万福, 陈长明.表面活性剂应用手册. 北京: 化学工业出版社, 1996： 28-43.
[7]范鹏, 顾中言, 徐德进, 等. 能在水稻叶上润湿铺展的甲维盐微乳剂的研制. 江苏农业学报, 2009, 25(5): 1019-1024.
[8]中国标准出版社.化学工业标准汇编——表面活性剂.北京: 中国标准出版社,1997: 48-53.
[9]顾中言.植物的亲水疏水特性与农药药液行为的分析. 江苏农业学报, 2009, 25(2): 276-281.
[10]顾中言, 陈明亮, 许小龙, 等. 表面活性剂TX-10对溶液表面张力及水稻植株持液量的影响. 江苏农业学报, 2006, 22(4): 394-397.
[11]顾中言, 陈明亮, 许小龙, 等.液体在结球甘蓝叶面上的行为趋势分析.江苏农业学报, 2006, 23(6): 568-572.
[12]顾中言, 许小龙, 韩丽娟. 不同表面张力的杀虫单微乳剂药滴在水稻叶面的行为特性.中国水稻科学, 2004,18(2): 176-180.
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