Weed management in strip-tillage Roundup Ready cotton

An experiment was conducted in 1998 at Goldsboro, NC to evaluate weed control, cotton tolerance, and yield in strip tillage Paymaster 1220 RR/BG cotton. Cotton was planted in 38 inch rows. The rye cover crop was terminated with a Roundup treatment approximately 30 days before planting. A number of herbicide systems were evaluated which included total postemergence systems that used either Roundup Ultra as needed (ASN) alone or Roundup Ultra ASN followed by (fb) Caparol plus MSMA late post directed (LAYBY). Additional treatments evaluated included a weedy check, Prowl preemergence (PRE) broadcast or banded (19 inch band) fb 1) nothing, 2) Staple plus MSMA early postemergence (EPOST) alone or fb Caparol plus MSMA LAYBY, or 3) Roundup ASN alone or fb Caparol plus MSMA LAYBY; Prowl plus Cotoran PRE broadcast or banded (19 inch band) fb 1) nothing, 2) Staple plus MSMA EPOST alone or fb Caparol plus MSMA LAYBY, or 3) Roundup ASN alone or fb Caparol plus MSMA LAYBY. Roundup Ultra was applied to four leaf cotton or smaller, after the 4L growth stage Roundup was applied with a hooded sprayer to minimize Roundup contact with the cotton foliage. When soil applied herbicides were applied on a band in Staple systems, the Staple plus MSMA was applied POST on a 19 inch band on the drill while the weeds in the row middle received a hooded treatment of Gramoxone Extra.