An Evaluation on Intensity of Infection of Pseudocercospora Leaf Spot Disease of Cowpea Cultivars ( Vigna unguiculata L. Walp), With Respect to Infector Rows, Dates of Inoculation and Cultivars, Grown Under Field Conditions in Northeast Thailand

摘要

This investigation was carried out at the Experimental Farm, Faculty of Agriculture, Khon Kaen University, Khon Kaen, Thailand to evaluate intensity of infection of Pseudocercospora Leaf Spot disease of cowpea cultivars, grown under field conditions with