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In this research, it was aimed to determine the effect of foliar applied methanol on some morphological characters and seed yield of sunflower (Helianthus annuus L.). In 2004, experiment was established randomized complete design in split plot arrangements with three replications by using C 207, Coban (oilseed type, hybrid) and KG-R-123 (non-oilseed type, synthetic) varieties as main plots and control, only water, 30 % and 40 % methanol treatments as split plots (15 m). Effects of treated methanol doses changed in terms of varieties on investigated characters. Varieties affected only on plant height in the harvest and leaf number and length in the beginning of flowering. Except for these three characters, 30 % methanol had the lowest values for the others in cv. Coban. The lowest values were obtained from 40 % methanol for head diameter, plant height in the beginning of flowering, a thousand seed weight and seed yield/plant of cv. C 207, differences among treatments were not found only for seed length. Methanol treatments affected positively on head diameter and a thousand seed weight, but from the point of view of investigated characters; water, 30 % and 40 % methanol treatments was involved in same statistical groups. Taken note of seed yield and characters (a thousand seed weight, seed length etc.) connected directly with seed yield and morphological characters investigated; it was not observed methanol doses had statistically positive effects.

Ayçiçeği (Helianthus annuus L.)’nin Bazı Morfolojik Karakterleri ve Tohum Verimi Üzerine Metanolün Etkisi