I. Umar A. Mohammed, C. S. Oaya, A. M. Malgwi,, Department of Agricultural Technology, Adamawa State College of Agriculture, P. M. B.2088, Ganye, Adamawa State, Nigeria; Department of Crop Protection, School of Agriculture and Agricultural Technology, Modibbo Adama University of Technology, P.M.B. 2076 Yola, Adamawa State, Nigeria; Department of Crop Production and Protection Federal University Dutsin-ma, Katsina State, Nigeria, Nigeria