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The Germination and Viability of Excreted Common Crupina (Crupina vulgaris) Achenes

  • Donald C. Thill (a1), David L. Zamora (a1) and Donald L. Kambitsch (a2)


Research was conducted to determine percentage excretion and germination or viability of common crupina (Crupina vulgaris Cass. # CJNVU) achenes fed to sheep (Ovis aries), cattle (Bos taurus), deer (Odocoileus hemionus), horses (Equus cabullus), and Chinese pheasants (Phasianus colchicus). No achenes were found in the feces of sheep. Horses (nonruminant), deer, and cows (both ruminant animals) excreted 5, 3, and 25%, respectively, of the achenes consumed. The mean percentage achene excretion for pheasants was 23%; however, excretion was highly variable among individuals. All achenes excreted by any test species were detected within 5 days after consumption. The percentage germination or viability of excreted achenes ranged from 29% (cows) to 81% (deer). The percentage of consumed achenes that were excreted and viable ranged from 2 to 7% for large animals, whereas it was 17% for pheasants.



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The Germination and Viability of Excreted Common Crupina (Crupina vulgaris) Achenes

  • Donald C. Thill (a1), David L. Zamora (a1) and Donald L. Kambitsch (a2)


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