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The Influence of Chilling and Chipping of Star-of-Bethlehem (Ornithogalum umbellatum) Bulbs on Plant Growth and Reproduction

Published online by Cambridge University Press:  20 January 2017

Nathan R. Johanning ,
John E. Preece  and
Bryan G. Young
Nathan R. Johanning*
Affiliation:
Department of Plant, Soil, and Agricultural Systems, Southern Illinois University, Carbondale, IL 62901
John E. Preece
Affiliation:
National Clonal Germplasm Repository, USDA–ARS, One Shields Avenue, University of California, Davis, CA 95616-8607
Bryan G. Young
Affiliation:
Department of Plant, Soil, and Agricultural Systems, Southern Illinois University, Carbondale, IL 62901
*
Corresponding author's Email: njohanning@siu.edu
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Abstract

Greenhouse studies were conducted on two southern Illinois star-of-Bethlehem populations to determine the influence of chilling and bulb chipping on plant growth and reproduction. Chilling was not required for leaf emergence of dormant bulbs, but an increase to 10 wk of chilling proportionally delayed leaf emergence by 41 and 42 d for the Murphysboro and the Marion populations, respectively. Bulb chipping did reduce plant height when compared to plants from nonchipped bulbs. Also, chipped bulbs produced a greater number of small daughter bulbs compared to nonchipped bulbs; however, total bulblet production was variable and dependent on population, mother bulb size, and chipping treatment. Overall, bulb chipping did not have any negative influence on star-of-Bethlehem and might promote increased daughter bulblet production. Therefore, field operations, such as tillage, that cut and chip bulbs might actually accentuate both the spread and density of star-of-Bethlehem infestations.

Keywords

Star-of-Bethlehem, Ornithogalum umbellatum L. OTGUMBulbous perennial weedtillageinvasive plant
Type
Research
Information
Invasive Plant Science and Management , Volume 5 , Issue 4 , December 2012 , pp. 402 - 407
Copyright
Copyright © Weed Science Society of America 

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