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Response of Cucumber Plants to Foliar Application of Chitosan and Yeast under Greenhouse Conditions

The present study was carried out in two successive seasons of 2010 and 2011 to study the effect of foliar application of chitosan rates (1, 2, 3 and 4 mlL -1 ) and yeast rates (1, 2, 3 and 4 gL -1 ) on growth, yield and quality as well as chemical constituents of cucumber plants. Results of this work showed that foliar application with yeast and chitosan increased significantly the vegetative growth, yield and its quality of cucumber. Meanwhile, foliar spraying with active dry yeast at rates of 4 g L -1 recorded highest values of T.S.S., N (%), Fe, Zn, Cu and Mn (mg kg -1 ) in cucumber fruits. However, foliar application of chitosan at rates of 4 mlL -1 gave highest contents of P and K % in the two seasons of study. It can be concluded that foliar application with chitosan at rates of 4 mlL -1 recorded the best treatment to obtain the highest vegetative growth, yield and quality of cucumber plants.