Crop Weeds
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Crop Weeds

Crop weeds are weeds that grow amongst crops.

Types of crop weed

Examples of crop weeds include chickweed, barnyard grass, dandelion, striga and Japanese knotweed.[1]


Despite the potential for some crop weeds to be used as a food source, many can also prove harmful to crops, both directly and indirectly. Crop weeds can inhibit the growth of crops, contaminate harvested crops and often spread rapidly. They can also host crop pests such as aphids, fungal rots and viruses.[2][3] Cost increases and yield losses occur as a result. Striga, one of the main cereal crop weeds in Sub-Saharan Africa, commonly causes yield losses of 40-100% and accounts for around $7 billion in losses annually. Around 100 million hectares of land in Sub-Saharan Africa are affected by striga.[4]Barnyard grass has been identified as a culprit in global rice yield losses and certain species have been known to mimic rice.[5]

See also


  1. ^ "MSU Extension Publication Archive" (PDF). Michigan State University Library. Retrieved 2012.[permanent dead link]
  2. ^
  3. ^ Robert L. Zimdahl (12 March 2004). Weed-crop competition: a review. Wiley-Blackwell. ISBN 978-0-8138-0279-4. Retrieved 2010.
  4. ^ "The African Witchweed menace". Global Food Security. December 2009. Retrieved 2015.
  5. ^ Labrada, R. (July 2002). The need for improved weed management in rice. Proceedings of the 20th Session of the International Rice Commission. Bangkok, Thailand. Retrieved 2015.

  This article uses material from the Wikipedia page available here. It is released under the Creative Commons Attribution-Share-Alike License 3.0.



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