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Growth and Development of Bigroot Morningglory (Ipomoea pandurata)

Published online by Cambridge University Press:  12 June 2017

Michael J. Horak  and
Loyd M. Wax
Michael J. Horak
Affiliation:
U.S. Dep. Agric., Agric. Res. Serv., Crop Prot. Res., Dep. Agron., Univ. Illinois, 1102 S. Goodwin Ave., Urbana, IL 61801
Loyd M. Wax
Affiliation:
U.S. Dep. Agric., Agric. Res. Serv., Crop Prot. Res., Dep. Agron., Univ. Illinois, 1102 S. Goodwin Ave., Urbana, IL 61801
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Abstract

Growth and development of bigroot morningglory was observed and quantified. Emergence occurred 75 ± 5 growing degree days (GDD) after seeding. Flower and seed production began 630 ± 20 GDD after emergence and continued until the first frost killed the shoots. Seedlings needed approximately 460 GDD of growth to become perennial. In the second year of growth, plants emerged in early May and flowered within 425 ± 50 GDD. Shoot dry weight accumulation in first-year plants was 3.5 g for the first 600 GDD after which a fifteenfold increase in dry weight occurred. Root growth followed the same pattern, however the large increase in dry weight occurred approximately 300 GDD later than that of the shoots. The root:shoot ratio was 0.2 to 0.3 for the first 900 GDD and increased to greater than 1.0 by the final harvest.

Keywords

Bigroot morningglory, Ipomoea pandurata (L.) G. F. W. Meyer ♯ IPOPAGrowing degree daysphotosynthate partitioningthermal time
Type
Research
Information
Weed Technology , Volume 5 , Issue 4 , December 1991 , pp. 805 - 810
Copyright
Copyright © 1990 by the Weed Science Society of America 

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References

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