Research Information System
Avrupa Bilim ve Teknoloji Dergisi, vol.0, no.17, pp.1256-1262, 2019 (Peer-Reviewed Journal)
One of the critical components of successful cotton production is effective weed management. Since cotton (Gossypium hirsutum L.)cannot compete sufficiently with weeds, especially in the first six weeks, a certain number of weeds significantly reduces cotton yield.In addition, weeds can make cotton harvest difficult and contaminate cotton fiber. The main preferred control method for broadleafweeds in the conventional cotton of Turkey (non-tolerant and non-resistant varieties) is the use of pre-emergence herbicides. However, ince there is not much information about the effects of mixtures of different pre-planting herbicides, the aim of this study is toevaluate the efficacy and selectivity of herbicides applied as a pre-emergence mixture in cotton. The randomized complete blockdesign (RCBD) with four replications and eleven treatments was used in the field experiment. The plots were established to 20 squaremeters (4 m x 5 m). Herbicide applications in the study were carried out in Diyarbakir in 2015, and dual mixtures of clomazone,fluometuron, oxyfluorfen, and pendimethalin were used with different mixtures and doses. Clomazone 0.2 l $ha^{-1}$ + fluometuron 1,5 l$ha^{-1}$, clomazone 0.2 l $ha^{-1}$ + fluometuron 2 l $ha^{-1}$, clomazone 0.4 l $ha^{-1}$ + pendimethalin 1.5 l $ha^{-1}$and clomazone 0.3 l $ha^{-1}$ +pendimethalin 2 l $ha^{-1}$ mixture was found to be complete weed control efficiency. This result shows that mixtures with clomazoneactive ingredient increase in the efficiency of herbicides pre-planting. Oxyfluorfen mixtures showed the most hazardous damage interms of product selectivity. The highest cotton yield (> 5 t h$ha^{-1}$) was obtained from the application of mixes of clomazone 0.30 l $ha^{-1}$+ fluometuron 2 l $ha^{-1}$and clomazone 0.2 l $ha^{-1}$ + fluometuron 1.5 l $ha^{-1}$, respectively.