Bacterial blight of guar(Cyamopsis tetragonoloba L.) caused by Xanthomonas axonopodis pv.cyamopsidis(XAC)was a new disease in field-grown guar in Xinjiang.Four samples of dry guar seeds were collected from Xinjiang.They were classified into three categories according to the phenotypic characteristic,asymptomatic(36.55%),moderately discoloured(51.94%) and shrivelled-discoloured(11.51%),respectively.Germination rate and infection rate of different symptom seeds were significant distinctive as the YDC agar med...