Weed Control Without Herbicides

  • R. J. Stephens


Following the discovery of potent insecticides and herbicides in the 1940s a euphoric attitude prevailed in which chemicals were seen as the panacea of all ills, able to provide easy and effective control of pest problems. Soon, however, insect resistance required the application of higher rates, destruction of predators increased the severity of pest infestations and sometimes actually created new pests. A reappraisal of chemotherapy was begun as the ecological implications for wild life and man himself of the highly persistent pesticides then in use became known. Gradually the notion of integrated control has evolved, in which pest and disease infestations are reduced below the economic threshold by a judicious combination of all feasible means, chemical, biological or cultural. The life cycles of pests and their parasites and predators were re-examined and improved pesticide application methods and pest and disease forecasting techniques were devised to provide an adequate control cheaply and with the least possible contamination of non-target organisms.


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Further Reading

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Copyright information

© R. J. Stephens 1982

Authors and Affiliations

  • R. J. Stephens
    • 1
  1. 1.School of Biological SciencesUniversity of BathUK

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