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Germination, Growth, and Seed Production of Ipomoea hederacea when Planted at Monthly Intervals

Published online by Cambridge University Press:  12 June 2017

Robert J. Thullen  and
Paul E. Keeley
Robert J. Thullen
Affiliation:
U.S. Dep. Agric., Agric. Res. Serv., Shafter, CA 93263
Paul E. Keeley
Affiliation:
U.S. Dep. Agric., Agric. Res. Serv., Shafter, CA 93263
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Abstract

In 1979 and 1980, ivyleaf morningglory [Ipomoea hederacea (L.) Jacq. # IPOHE] seed were planted in field plots at monthly intervals beginning with March and continuing through October. During the first 9 weeks, seedlings from the July plantings grew more rapidly than those from the other monthly plantings and produced the heaviest fresh weights. Vegetative growth slowed after the 9-week harvest and seedlings from June plantings had heavier fresh weights at the 12-week harvest. Plants from the July planting produced the greatest number of seed at both the 9- and 12-week harvests. After scarifying, seed produced by plants from April through August (12-week harvest) germinated best with the 27/32 C night/day air temperature regime, but also germinated at 15/21, 21/27, and 27/32 C regimes. Ivyleaf morningglory seed did not germinate at an air temperature regime of 10/15 C. With an air temperature regime of 32/38 C the germination of some lots began to decrease.

Keywords

FlowerscapsulesIPOHE
Type
Research Article
Information
Weed Science , Volume 31 , Issue 6 , November 1983 , pp. 837 - 840
Copyright
Copyright © 1983 Weed Science Society of America 

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References

Literature Cited

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