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Biological Control of Weeds

  1. Erin N. Rosskopf

Published Online: 15 APR 2003

DOI: 10.1002/047126363X.agr315

Encyclopedia of Agrochemicals

Encyclopedia of Agrochemicals

How to Cite

Rosskopf, E. N. 2003. Biological Control of Weeds. Encyclopedia of Agrochemicals. .

Author Information

  1. USDA–ARS, USHRL Fort Pierce, Florida

Publication History

  1. Published Online: 15 APR 2003


Weeds are one of the most costly and limiting factors in crop production, causing losses in yield by competing with crop plants for light, water, nutrients, heat energy, carbon dioxide, and space. In the United States, chemical herbicides account for 60% of the agricultural pesticides applied. Chemical herbicides, although effective, have problems associated with their use. As a result, avenues have been opened for use of plant pathogens as biological control agents for weeds. This process involves the use of a pathogen to suppress or control a weed population through the intentional creation of a plant disease epidemic.


  • weeds;
  • chemical herbicides;
  • plant pathogens;
  • biological control;
  • biological control agents;
  • bioherbicides;
  • deleterious rhizobacteria