Effect of infected groundnut seeds on transmission of Pseudomonas solanacearum.
One of 20 seed samples from naturally infected groundnut pods contained P. solanacearum, isolated from an embryo. The pathogen could be recovered from inoculated seeds but not from seeds taken from inoculated pods. All seeds became infected when soaked in an inoculum suspension for 24 h at 28°C. Survival of P. solanacearum in seeds was closely related to the water content. The pathogen could not be detected in seeds with a water content <8.9% after drying at room temp. or <10% after drying in sunlight. Thus transmission of bacterial wilt through seed may be prevented by dry preservation measures.