Gayle H. Davidonis, USDA-ARS, USDA-ARS-Southern Regional Research Center, 1100 Robert E. Lee Blvd, New Orleans, LA 70124, Devron P. Thibodeaux, USDA-ARS-SAA, Cotton Quality Research Station, Mc Gregor Rd,, Clemson, SC 29634, Ernest L. Clawson, LSU Ag Center, PO Box 438, St. Joseph, LA 71366, and Donald J. Boquet, LSU AgCenter, 2675 Hwy 865, Winnsboro, LA 71295.
Adjustments to production practices have the potential to change fiber and yarn properties. In locations prone to the production of high micronaire cotton late planted cotton may show reductions in fiber and yarn quality. Eight cultivars were grown in Winnsboro and St. Joseph, LA in 2004 and 2005. Planting dates were early April , late April, early May and late May. Fiber was analyzed using HVI and AFIS PRO. Minispinning techniques were used to obtain ring spun yarn. Fiber length did not change across planiting dates within a cultivar within a year. For some cultivars micronaire values decreased with lateness of planting but did not fall below 4.0. Yarn tenacity did not deteriorate with lateness of planting. The trend was seen in cultivars with high and low yarn tenacities. The data indicated that late planting did not adversely affect yarn tenacity.
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