Recovery of Pseudocercosporella herpotrichoides Spores from Rain-Splash Samples

Methods for recovery of P. herpotrichoides spores from rain-splash were tested, initially with pure spore suspensions and then with field samples. Provided surfactant was added and samples were processed immediately, centrifugation gave good recovery or spores from field samples which contained few soil particles. Foam-flotation, glycerol and sucrose methods for separation of spores from soil particles were not satisfactory for P. herpotrichoides spores. A paraffin oil method proved to be the most reliable because it gave good recovery of P. herpotrichoides spores from field samples containing many soil particles.