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Alkylthiophenylureas with phytotoxic activity.

P Borgna

    Il Farmaco; Edizione Scientifica
    |March 1, 1976
    PubMed
    Summary

    Researchers synthesized and tested phenylurea herbicides for effectiveness. Certain 1-(p.alkylthio)phenyl-3-dimethylureas demonstrated potent pre- and post-emergence weed control at low application rates.

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    [Phytotoxic activity of asymmetric N,N-dialkylamides of trisubstituted benzoic acids].

    Il Farmaco; edizione scientifica·1978

    Area of Science:

    • Agricultural Chemistry
    • Organic Synthesis
    • Plant Science

    Context:

    • Development of novel herbicides is crucial for sustainable agriculture and effective weed management.
    • Phenylurea derivatives are a known class of herbicides with diverse modes of action.
    • Understanding structure-activity relationships is key to optimizing herbicide efficacy.

    Purpose:

    • To synthesize a novel series of 1-(p.alkylthio)phenylureas, designated as substances I through XXXVII.
    • To evaluate the pre-emergence and post-emergence phytotoxicity of these synthesized compounds.
    • To identify specific structural features that confer high herbicidal activity.

    Summary:

    • A library of 1-(p.alkylthio)phenylureas with variations at the N3 position was synthesized.
    • Phytotoxicity assays were conducted to assess herbicidal activity against weeds.
    • Several compounds exhibited significant pre- and post-emergence herbicidal effects, with notable activity observed for 1-(p.alkylthio)phenyl-3-dimethylureas at rates as low as 2 kg/ha.

    Impact:

    • Identified highly active herbicidal compounds within the 1-(p.alkylthio)phenylurea class.
    • Demonstrated the potential of specific dimethylurea derivatives for low-dose weed control applications.
    • Provides a foundation for further research into optimizing these herbicides for agricultural use.

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