Effect of Foliar Application of Methanol in Water Stress Condition on Yield Components of Phaseolus vulgaris L.

Application of Methanol solution on plant shoots increase yield and decrease water stress effects. The research was conducted in the Research Farm in the Agriculture Faculty of the University of Tabriz، in order to evaluate the effect of different concentration of Methanol solution spraying on different growth stages of P. vulgaris L. before and after flowering، in water stress conditions. It was conducted in split plot form in completely random blocks with three replications. The methanol solution densities were five percent and ten percent by volume. The water stress included three levels of irrigation after 70، 120 and 170 millimeters evaporation، as the main factor and different volumetric densities of Methanol solution spraying as the sub factors in five different levels. Based on the results، effect of treatments on height of plant، number of pods in main stem، dry weight، number of pods in the plant، number and weight of empty pods، weight of 100 seeds، biological performances were meaningful and harvest index with one percent probability. Furthermore، the best performance was obtained with the ten percent density of Methanol solution spraying after flowering stage of P. vulgaris L. and the irrigation after 70 millimeter evaporation.