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Competition of Four Morningglory (Ipomoea spp.) Species with Cotton (Gossypium hirsutum)

Published online by Cambridge University Press:  12 June 2017

R. H. Crowley  and
G. A. Buchanan
R. H. Crowley
Affiliation:
Soils and Herbicide Res., Natchez For. Res. Center, International Paper Co., Natchez, MS 39120 Dep. Agron. and Soils, Auburn Univ.
G. A. Buchanan
Affiliation:
Dep. Agron. and Soils, Auburn Univ., Agric. Exp. Stn., Auburn, AL 36830
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Abstract

Tall morningglory [Ipomoea purpurea (L.) Roth.], pitted morningglory (I. lacunosa L.), ivyleaf morningglory [I. hederacea (L.) Jacq.] and entireleaf morningglory (I. hederacea var. integruiscula Gray) were compared for their competitive ability with cotton (Gossypium hirsutum L.) at weed densities of 4, 8, 16 and 32 weeds/15 m of row. Tall morningglory was the most competitive with yield reductions of as much as 88% at 32 weeds/15 m. The higher populations of tall morningglory also significantly reduced cotton populations, mechanical harvesting efficiency and lint percentage below that in the controls. Pitted morningglory densities twice that of tall morningglory were required to produce cotton responses similar to those induced by tall morningglory. Ivyleaf morningglory and entireleaf morningglory were almost identical in their competitive potentials and were less competitive than the other species evaluated. Their competitive ability was greatly reduced by disease. Competition from morningglories did not consistently affect cotton fiber micronaire, fiber length or strength.

Keywords

Qualityyieldharvesting efficiency
Type
Research Article
Information
Weed Science , Volume 26 , Issue 5 , September 1978 , pp. 484 - 488
Copyright
Copyright © 1978 by the Weed Science Society of America 

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References

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