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Controlled-release system for the insect growth regulator cyromazine

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Abstract

An encapsulation system designed to give long-lasting effectiveness of the insect growth regulator (IGR) cyromazine (Neporex) against Culex pipiens (Culicidae) mosquito larvae was developed. The main thrust of the research was to develop a simple method for preparing controlled-release formulations by means of an extrusion technique in combination with a supplementary coating and to study the release characteristics and effectiveness of the formulations. A series of formulations were prepared with low-density polyethylene (LDPE 600) for the matrix and with polyurea or one of four types of polyurethane for the coating. The rate of release of the active material from the controlled-release formulations was determined in an in vitro dissolution system. The biological activity of the controlled-release formulations was tested in vivo against C. pipiens larvae.

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Authors and Affiliations

  1. Department of Chemical Engineering, Ben-Gurion University of the Negev, P.O.B. 653, Beer-Sheva 84105, Israel, , , , , , IL

    L. Schwartz & D. Wolf

  2. The Institutes for Applied Research, Ben-Gurion University of the Negev, P.O.B. 653, Beer-Sheva 84105, Israel, , , , , , IL

    A. Markus & Z. Wiesman

  3. Cracow University of Technology, ul. Warszawska 24, 31-155 Cracow, Poland, , , , , , PL

    S. Wybraniec

Authors
  1. L. Schwartz
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  2. D. Wolf
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  3. A. Markus
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  4. Z. Wiesman
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  5. S. Wybraniec
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Additional information

Received: 3 August 2000 / Accepted: 22 December 2000

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Schwartz, L., Wolf, D., Markus, A. et al. Controlled-release system for the insect growth regulator cyromazine. Clean Products and Processes 3, 49–54 (2001). https://doi.org/10.1007/s100980100100

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  • DOI: https://doi.org/10.1007/s100980100100

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