Effects on technologic and agricultural features of cotton (Gosspyium hirsutum L.) of pix which applied different doses and different times in Diyarbakir ecological conditions

This study was conducted to evaluate the effects on yield and lint quality of cotton of plant growth regulator Pix (mepiquat chloride) which applied different doses and different times at the experimental area D.Ü. Faculty of Agriculture in 2007. Split plot design with three replications was applied as experimental design., Yield, Treatments times had constituted the main plots and treatments doses had constituted the sub plots. Plant growth regulator Pix was applied on early bloom and on top bloom as 50?100?150 cc/da.From the study it was determined that seed cotton yield of the boll, 100 seed weight, ginning percentage were effected from the treatment and height of plant, number of sympodial were effected from the doses of the PixTM. And the interaction beetween the time of treatments x doses of treatments were important for the features plant height, one hundred seeds weight, fiber fineness (micronaire), number of bolls per plant and fiber strengthKeyWords: Cotton, Mepiquat chloride, Growth regulatorQuality