Weed Control, Yield, and Net Returns Using Imazethapyr in Peanuts (Arachis hypogaeaL.)

Author:

Wilcut John W.,Walls F. Robert,Horton David N.

Abstract

Field experiments were conducted in 1988 and 1989 to evaluate imazethapyr for weed control in peanuts. Imazethapyr was applied PRE or POST at 3, 5, or 7 weeks after crop emergence (WAE) at 0.071 kg ai ha–1. Imazethapyr applied PRE controlled common lambsquarters 85%, prickly sida 92%, and a mixture of entireleaf, ivyleaf, pitted, and tall morningglory species 77%. Morningglory control was at least 91% with imazethapyr plus metolachlor PRE followed by imazethapyr plus 2,4–DB or imazethapyr plus acifluorfen at 3, 5, or 7 WAE. Yields from systems that included metolachlor plus imazethapyr PRE followed by imazethapyr plus acifluorfen, imazethapyr plus 2,4–DB, or acifluorfen plus 2,4–DB at 3 WAE were greater than yields from the handweeded check. All systems with imazethapyr plus metolachlor PRE followed by any POST treatment except imazethapyr plus acifluorfen 7 WAE provided net returns equivalent to the herbicide standard of metolachlor PRE and acifluorfen and bentazon plus 2,4–DB 3 WAE. All systems except imazethapyr PRE provided greater net returns than the handweeded weed–free check.

Publisher

Cambridge University Press (CUP)

Subject

Plant Science,Agronomy and Crop Science

Reference25 articles.

1. Imazethapyr for broadleaf weed control in Virginia peanuts;Wilcut;Proc. Am. Peanut Res. Educ. Soc.,1989

2. Abbreviations: WAE, weeks after crop emergence.

3. Postemergence weed control systems without dinoseb for peanuts (Arachis hypogaea);Wilcut;Weed Sci.,1989

4. Lactofen Systems for Broadleaf Weed Control in Peanuts (Arachis hypogaea)

5. Absorption, translocation, and metabolism of imazethapyr in peanuts (Arachis hypogaea), soybeans (Glycine max), and selected weed species;Cole;Weed Sci.,1989

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