Different methods for detection of Xanthomonas campestris pv. Vignicola (burkh.) dye in cowpea (Vigna unguiculata (L.) walp.) seeds and studies on host range

Of the four seed health testing techniques viz., seed soaking, seed maceration, blotter test and growing-on test used for the detection of Xanthomonas campestris pv. vignicola (Burkh.) Dye from naturally infected seeds of cowpea, seed soaking test was found to be superior to other methods from quarmltine point of view. In the host-range studies, Glycine max, Pisum sativum and Vida faba were identified as compatible hosts for the first time and injection-infiltration technique showed superiority over the spray inoculation technique.