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Walnut

Walnut orhcardWhy Is the Postharvest Season Important in an IPM Program?

After harvest consider planting a cover crop in row middles to reduce weed growth, or allow resident vegetation to grow. A cover crop may also help reduce erosion, soil compaction, and water and sediment runoff to creeks and streams that ultimately impair water quality. Perennial weeds are a major problem and should be kept from establishing in row middles. Ideally, tree rows are weed free.

For more information on weed management in established orchards see the Integrated Weed Management Pest Management Guideline.

Statewide IPM Program, Agriculture and Natural Resources, University of California
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