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Subject: Wheat fields ploughed at night need no pesticides


Author:
Oliver Klaffke
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Date Posted: 12/ 5/03 8:20
Author Host/IP: dialup-211.43.220.203.acc07-dryb-mel.comindico.com.au/203.220.43.211

Wheat fields ploughed at night need no pesticides

Summarised from an item by Oliver Klaffke, entitled 'Why farmers should love the dark', in New Scientist (April 11th '98).

Peter Juroszek and colleagues at the University of Bonn in Germany have found that strips of land ploughed at night grow five times fewer weeds. Wheat fields in particular grow so few weeds that pesticides are unnecessary.


'The seeds of most weeds need less than a millisecond's light, whereas the seeds of most crops can grow in complete darkness'

The seeds of most weeds need less than a millisecond's light for germination to begin, whereas the seeds of most crops can grow in complete darkness. Ploughing brings weed seeds temporarily to the surface before they are reburied.

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