The effect of agricultural defoliation on cotton fiber technological quality indicators

Abstract

Fiber quality studies were conducted on the HVI system, and according to the results of the study, the fiber micronaire index of 4.6, specific breaking strength of 32.3, fiber length of 1.08 inches in the control variant of 30-40% exposed background of cotton variety S-8290, the length uniformity index is 83.1%, the short fiber index is 3.9%, the elongation at break is 7.3%, the trash code is 2.5, the number of impurities is 5.5%, the area of impurities is 0.25%, the reflection coefficient was 76.3%, and the degree of yellowness was 8.0. Taking this into account, the influence of the defoliants "Entodefol" and "FanDEF-excellent" on the technological indicators of the quality of cotton fiber when opening the boxes of cotton S-8290 and S-6775 by 30-40% and 50-60% in the conditions of meadow soils of the Fergana region was studied.