ABSTRACT
Studies were conducted in Goldsboro, NC in 1998 and 1999 and Lewiston, NC in 1999 to evaluate weed management programs in strip-tilled ‘Paymaster 1220RR/BG' cotton (Gossypium hirsutum). Cotton was planted in 38-inch rows on sandy loam soil. The wheat cover crop was terminated with a Roundup Ultra (glyphosate) (1.0 qt/A) treatment approximately 30 days prior to planting. Twelve herbicide systems were evaluated which included a factorial arrangement of preemergence (PRE) systems and postemergence (POST) systems. Preemergence herbicide options included 1) nothing, 2) Prowl (pendimethalin) (39 fl oz/A PRE) plus Cotoran (fluometuron) (1 qt/A PRE) broadcast, 3) Prowl (39 fl oz/A PRE) banded (19-inch band), or 4) Prowl (39 fl oz/A PRE) plus Cotoran (1 qt/A PRE) banded. Postemergence herbicide options included 1) nothing, 2) Roundup Ultra as needed (1.5 pt/A ASN) alone, or 3) Roundup Ultra (1.5 pt/A ASN) followed by (fb) Caparol (prometryn) (1.2 qt/A) plus MSMA (2.67 pt/A) late post directed (LAYBY). Roundup Ultra was applied to four leaf cotton or smaller, after the 4L growth stage Roundup Ultra was applied post-directed to minimize Roundup Ultra contact with the cotton foliage. Soil-applied herbicides were applied on a band in the PRE systems in a 19-inch band on the drill.
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