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Persistence of Spotted Knapweed (Centaurea maculosa) Seed in Soil

  • Edward S. Davis (a1), Peter K. Fay (a1), Timothy K. Chicoine (a1) and Celestine A. Lacey (a1)

Abstract

Experiments were established in 1982 to study the loss of viability of spotted knapweed seeds (achenes) in soil. Greater than 50 and 25% of buried seeds remained viable but dormant after 5 and 8 yr at two locations, respectively. Decline in seed viability was also measured in two natural seedbanks. Although the soil seed reserve decreased by 95% over a 7-yr period, approximately 400 000 viable seeds per ha remained, indicating that spotted knapweed seeds will last for many years in soil.

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Persistence of Spotted Knapweed (Centaurea maculosa) Seed in Soil

  • Edward S. Davis (a1), Peter K. Fay (a1), Timothy K. Chicoine (a1) and Celestine A. Lacey (a1)

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