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Isolation Distances for Varietal Purity in Seed Production

Isolation Distances for Varietal Purity in Seed Production. John Navazio Organic Seed Alliance. Isolation Distances. Minimum distances are dependent on “intended use” – no distance is absolute! Decreased isolation permitted with; Presence of physical barriers Staggered flowering time

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Isolation Distances for Varietal Purity in Seed Production

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  1. Isolation Distances for Varietal Purity in Seed Production John Navazio Organic Seed Alliance

  2. Isolation Distances • Minimum distances are dependent on “intended use” – no distance is absolute! • Decreased isolation permitted with; • Presence of physical barriers • Staggered flowering time • Collection of seed from center of “block” • Similar “crop types” of a crop are produced • Increased Isolation necessary when; • Large number of pollinators are present • Crop populations are large • Dissimilar “crop types” of a crop are produced

  3. Crossers / Wind Pollinated

  4. Crossers / Insect Pollinated

  5. Selfers

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