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1 January 2008 Critical Period of Weed Interference in Peanut
Wesley J. Everman, Scott B. Clewis, Walter E. Thomas, Ian C. Burke, John W. Wilcut
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Field studies were conducted near Lewiston–Woodville and Rocky Mount, NC to evaluate the effects of mixed weed species on peanut yield. A combination of broadleaf and grass weeds were allowed to interfere with peanut for various intervals to determine both the critical timing of weed removal and the critical weed-free period. These periods were then combined to determine the critical period of weed control in peanut. The effects of various weedy intervals on peanut yield were also investigated. The predicted critical period of weed control, in the presence of a mixed population of weeds, was found to be from 3 to 8 wk after planting (WAP). Peanut yield decreased as weed interference intervals increased, demonstrating the need for weed control throughout much of the growing season in the presence of mixed weed populations.

Nomenclature: Peanut, Arachis hypogaea L

Wesley J. Everman, Scott B. Clewis, Walter E. Thomas, Ian C. Burke, and John W. Wilcut "Critical Period of Weed Interference in Peanut," Weed Technology 22(1), 63-67, (1 January 2008).
Received: 3 April 2007; Accepted: 1 September 2007; Published: 1 January 2008

Critical period of weed removal
Critical time of weed removal
critical weed free period
Weed competition
Weed interference
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