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Production, Fiber Quality, and Ginning Performance of Low and High Pubescent Pima Cotton¹

A high pubescent Pima (Gossypium barbadense L.) cultivar that has high yield potential and adequate fiber properties was identified and evaluated. Performance testing and fiber quality evaluation were obtained while developing these cottons. The high pubescent cultivar was found to have greater amounts of trash in the seed cotton samples after normal cleaning than low pubescent commercial cultivars. A ginning study was conducted to determine the effectiveness of two seed cotton cleaning treatments for removal of trash from the high pubescent, experimental cultivar and a low pubescent, commercial cultivar. A moderate seed cotton cleaning system was adequate for cleaning the low pubescent Pima cotton, but an elaborate seed cotton cleaning system was required for obtaining acceptable grades of the high pubescent Pima cotton, —

Key Words: Roller ginned • Micronaire • Yarn tenacity • Motes • Gossypium barbadense L.

² Respectively, research agronomist, ARS-USDA, 1380 A&M Circle, E1 Paso, TX 79927; agricultural engineer, ARS-USDA, Southwestern Cotton Ginning Research Laboratory, Mesilla Park, NM8 8047; and research agronomist, ARS-USDAC, otton Research Center, 4207 E. Broadway, Phoenix, AZ 85040

Received for publication July 1, 1977.