Institution: | (1) Department of Plant Pathology, Washington State University, Irrigated Agriculture Research and Extension Center, 24106 N. Bunn Rd, Prosser, WA 99350, USA;(2) International Institute of Tropical Agriculture, Oyo Road, PMB 5320, Ibadan, Nigeria;(3) National Root Crops Research Institute, Umuahia, Nigeria;(4) Present address: AVRDC-The World Vegetable Center, PO Box 42, Shanhua, Tainan, 74199, Taiwan, ROC; |