Response of Cotton Cultivars to Planting Dates and Weed Control

Abstract

A field experiment was carried out in the fields of Ibn Al-Bitar Preparatory Vocational School in Al-Hussainiya District - Kerbala Governorate during summer season 2020. split-split plot arrangement within Randomized Complete Block Design (RCBD) was used with three replications. The objective of this experiments was to investigate the response of six cotton cultivars were assigned in the sub-sub plots (Marsumi,  Lashata , Abu Ghraib, Dise, Coker310 and W888) to three  weed control (weedy check, trifluralin (44%) was spryed at a rate of 2. 400 L.h^-1 and weed free) were assigned in the sub plots and of planting dates (on 24/3/2020 and the second on 14/4/2020) were assigned in the main plots.. The result of experiment revealed the following for sixteen studied traits. Best significant interaction among planting dates and weed control and cultivars were achieved through planting date 24/3 in the treatment of weed free of the cultivar Lashata for the characteristics of the seed cotton yield and the percentage of ginning outturn, were (2073.30 kg.h^-1 and 35.20%) respectively. Also, planting date 24/3 in the treatment of trifluralin (44%) of the cultivar Lashata gave significant superiority for the characteristic of number of open bolls and boll weight were (36.84 bolls.plant^-1 and 5.30 gm) respectively. Compared to the weed free treatment, which gave the least results.