EPPO Global Database

EPPO Reporting Service no. 04 - 1991 Num. article: 1991/06

Alternative host for Xanthomonas campestris pv. oryzae

A perennial weed, Leersia hexandra, was identified as an alternative host of Xanthomonas campestris pv. oryzae (EPPO A1 list; see also EPPO Reporting Service No 498/01) in Texas (US).
The pathogen was isolated from naturally infested L. hexandra which showed no disease symptoms.
Continuing studies showed that in artificially infected L. hexandra the pathogen multiplied without causing any disease symptoms. This indicates that L. hexandra provides a source of inoculum for the bacterial leaf blight of rice.


Gonzales, C.F.; Xu, G, -W.; Li, H.-L.; Cosper, J.W. (1991) Leersia hexandra, an alternative host for Xanthomonas campestris pv. oryzae in Texas.
Plant Disease 75, 159-162.