An Evaluation of Sixteen Commercial Picker Cotton Varieties for Performance Factors and Feeding Damages Sustained under Heavy Whitefly Pressure in the Lower Rio Grande Valley

S. D. Livingston, B. P. Cowan, and J. W. Norman


 
ABSTRACT

Sixteen commercial picker cotton varieties were evaluated for lint reductions resulting from Sweetpotato Whitefly (SPW). Evaluations of leaf damage, leaf trichome density, and fiber qualities were performed to investigate possible correlations with SPW damage. A total of 20 mini-bales were sent to Texas Tech ICTRD for an intensive evaluation of fiber handling properties. Variations in WSRSC (Perkins' test) did not explain the variations in spinning performance or at the roving frame. Yarn breakage rates were correlated with fiber strength, but not WSRSC. The effects of PC3 on handling cotton was inconclusive without an untreated check taken from the test site. Higher levels of waste were observed with hairy leaf varieties and these cottons also sustained the highest lint reductions. Infrared aerial photographs confirmed visual ratings and observations. Cotton evaluated at ICTRD was not determined sticky and presented average processing performance.



Reprinted from 1992 Proceedings Beltwide Cotton Conferences pp. 557 - 559
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998