ISSN:
0025-116X
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Polymerizable N2-(4-chloro-2-methylphenyl)-N1-methylformamidine derivatives of (N-demethyl-chlordimeform) (2) were prepared, bearing either 4-vinylbenzyloxy- or 2-methacryloyloxyethoxycarbamoyl groups (5 and 7), and in addition, a triazatriphosphorine derivartive of 2 (8). The carbamoyl groups and the P-N linkages in the monomers, respectively, were specifically designed to release the insecticide 2 under the particular microenvironmental conditions on cotton leaves by hydrolytic cleaveage, triggered by the pH 8-10 of the leaf surface. Biossaying experiments using larvae of the Egyptian Cotton Leafworm (Spodoptera littoralis) on cotton plants confirmed methacrylate 7 as the only compound with sufficient bioactivity. Corresponding homo- and copolymers of 7, containing covalently bound pendent moieties of 2, showed advantageous physiochemical properties with regard to improved efficiency and reduced environmental and handling risks in conventional foliar applications. The biological data suggest that the release rates of the active agent from the polymers vary significantly, depending on the hydrophilicity of the comonomers and the type of formulation used.
Additional Material:
3 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/macp.1987.021880207
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