Abstract

Wind and windblown sand were examined for their role in infection of pepper (Capsicum annuum) by the bacterial spot pathogen (Xanthomonas campestris pv. vesicatoria). At four inoculum concentrations from 10 5 to 10 8 cfu/ml, significantly more lesions occurred on Jupiter plants wounded by simulated windblown sand than on nonwounded plants. There were also more lesions on pepper plants when leaves rubbed against each other in simulated windstorms than when no abrasion occurred. Numbers of lesions doubled after 10-min exposure to an 8-m/sec windstorm or sandstorm in a wind tunnel (.)

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