Weed Control in Organic Vegetables

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Weed Control in Organic Vegetables

• Doug Doohan
• OSU / OARDC

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Must Dos!

• Get rid of Perennials

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Must Dos

• Kill the root

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Must Dos!

• Clean seed

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Must Dos

• Prevent weed seed production

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Tools
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Tools
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Tools
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Tools
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Tools
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Plant Injury

• More injury in cabbage
• 4 kph most damaged 5 DAF

• Injury not evident 20 DAF

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Weed Control 2002

• All flaming treatments more effective than
  control
• 5 DAF, weed control most effective in 4 8 kph

• 20-50 DAF, 4 kph provided better control than all
  other treatments, with nearly 70 control 50 DAF

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Weed Control 2003

• 5 DAF, 4 kph most effective in tomato with gt70
  control

• 15 DAF, control in the 4 kph treatment reduced to
  20

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Tools
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Strategies
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Strategies (scheming)
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Strategies

• Later seeding
• Weed seed-bank depletion

April 1
http//weedecology.wisc.edu/weedometer/
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Strategies

• Later seeding
• Weed seed-bank depletion

http//weedecology.wisc.edu/weedometer/
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Strategies
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Average Seed Production
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Strategies

• How much weed control is enough?

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Strategies

• ZST plot
• Cabbage field 8-9 weeks
• after transplanting
• CP plot

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Acknowledgements

• Initiative for Future Agriculture Food Systems
• OVSFRDP
• OARDC RECGP Small Industry Matching Grant
• Warner Foundation
• Students, PostDocs, Technicians Summer Help