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Response of velvetleaf demographic processes to herbicide rate

Authors :
Chris M. Boerboom
Alvin J. Bussan
David E. Stoltenberg
Source :
Weed Science. 49:22-30
Publication Year :
2001
Publisher :
Cambridge University Press (CUP), 2001.

Abstract

Field studies were conducted in 1995 and 1996 to determine the rate response of velvetleaf seedling survival, seed production, and shoot biomass to postemergence herbicides in corn and soybean. Dicamba and imazethapyr were applied to corn and soybean, respectively, at 1, ½, ¼, ⅛, 1/16, 1/32, and 0× labeled rates. Velvetleaf mature plant density was linearly related to seedling density, thus indicating that seedling survival was not density dependent, even after seedling densities exceeded 150 plants m−2. Seedling survival as influenced by herbicide was described by a dose–response curve in corn and soybean. In corn, seedling survival ranged from 0 to 48% across herbicide treatments and years. Seedling survival was greater at the ½× or lower herbicide rates than at the 1× rate. In soybean, maximum seedling survival was 61 and 14% in 1995 and 1996, respectively, and minimum seedling survival was less than 2% in each year. Seedling survival was less in 1996 than in 1995 because velvetleaf was infect...

Details

ISSN :
15502759 and 00431745
Volume :
49
Database :
OpenAIRE
Journal :
Weed Science
Accession number :
edsair.doi...........d515e1530b5b9eab82715cae896ebf65
Full Text :
https://doi.org/10.1614/0043-1745(2001)049[0022:rovdpt]2.0.co;2