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Ivyleaf Morningglory (Ipomoea hederacea) Control with Herbicides in Soybeans (Glycine max)

Published online by Cambridge University Press:  12 June 2017

S. D. Prosch  and
George Kapusta
S. D. Prosch
Affiliation:
Dep. Plant Soil Sci., South. Illinois Univ., Carbondale, IL 62901
George Kapusta
Affiliation:
Dep. Plant Soil Sci., South. Illinois Univ., Carbondale, IL 62901
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Abstract

When trifluralin [α,α,α - trifluoro - 2,6 - dinitro -N,N-dipropyl-p -toluidine] was manually incorporated in small field plots to a depth of 10 cm, ivyleaf morningglory [Ipomoea hederacea (L.) Jacq.] was controlled more effectively than when incorporation was only 5 cm deep. No significant differences in ivyleaf morningglory control were observed between different incorporation depths when trifluralin was mechanically incorporated in large field plots. Ivyleaf morningglory emerging from 10 cm deep was controlled to a greater degree than that emerging from 5 cm deep. Preplant incorporated (PPI) trifluralin plus alachlor [2 - chloro – 2′, 6’ - diethyl - N- (methoxymethyl)acetanilide ] applied preemergence (PE) controlled up to 92% of the ivyleaf morningglory compared to 33 and 15% respectively, when these herbicides were applied alone at equal rates. This indicates a synergistic interaction between these two compounds. Trifluralin PPI plus RH 8817 [5-(2-chloro-4-trifluoromethyl phenoxy) - 2 - nitrobenzoic acid ethyl ester] and alachlor applied PE controlled ivyleaf morningglory more effectively (88 to 94%) than all other treatments. Soybean [Glycine max (L.) Merr.] injury and stand reduction were less than 5% in all studies.

Keywords

Depth of emergenceherbicide combinationsincorporation depthsynergismRH 8817alachlortrifluralin
Type
Research Article
Information
Weed Science , Volume 31 , Issue 1 , January 1983 , pp. 23 - 27
Copyright
Copyright © 1983 Weed Science Society of America 

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References

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