Fiber fine- structure and yarn mechanical properties of some Egyptian and upland cotton varieties treated by some insecticides .
Abstract: Fiber fine structure as well as yarn mechanical properties as affected by insecticides were studied. 5 cotton varieties were used, 4 American Uplands and 1 Egyptian. 4 bollworm insecticides were used. There were significant differences between varieties, treatments and their interaction in the number of reversals per mm. differences between varieties and the interaction between varieties and treatments were also significant regarding the number of convolutions per mm. DC0702 decreased the frequency reversals while Deenate insecticide increased it. Hostathion caused the highest number of convolutions per mm in Mc NAir 220 fibers, while Deenate caused the lowest number with Giza 75 variety. Regarding single yarn mechanical properties, it was found that insecticidal treatments affected yarn strength, breading load c.v. % and yarn stiffness. However, yarn elongation %, elongation c.v. % anf# yarn toughness were not affected by insecticides. Differences between varieties in yarn strength, breaking load c.v. % elongation c.v. % and yarn stiffness were highly significant. Moreover, the interactions between varieties and insecticidal treatments for yarn strength, breaking load c.v. % and elongation c.v. % were also highly significant. It is worthy to mention that Tamcot 37 H gave the highest frequency reversals (weak points), so it produced less elongated yarns at break. Giza 75 had the strongest yarns, therefore, its yarns were the most stiff and had the highest toughness value. Mc Nair 220 had the weakest yarns, so it gave the lowest yarn toughness and stiffness.
Publication year 1989
Pages 267-281
Organization Name
City اسيوط
serial title Assiut Journal of Agric Sci .
Department Cotton Spinning Research
Project
Author(s) from ARC
External authors (outside ARC)
    عبد الحميد نجم الصباغ معهد بحوث القطن
    عبد الله أحمد عبد الحفيظ أ.د/ زراعة القاهرة
Proposed Agrovoc cotton technology;
Publication Type Journal
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