Submitted to: National American Phytopathology Meetings
Publication Type: Abstract Only
Publication Acceptance Date: April 20, 1997
Publication Date: N/A
Formulations of F. oxysporum f. sp. erythroxyli isolate EN-4, pathogenic to E. coca var. coca were evaluated to determine their relative ability to enhance pathogen populations in the soil and cause disease. The formulations, including Rice alginate prill, C6 granular, and Pesta, were applied in the greenhouse and field at 5.5 kg/ha. EN-4 was present in the upper 1 cm of treated soil at 10 fold greater populations, i.e. 10**4 to 10**5, than those established throughout the top 7 to 10 cm of soil, 1 month after application. The primary formulations tested established similar pathogen populations causing similar rates of disease development. The data suggest that formulations using the same biomass and with similar potential for spore production may be expected to cause similar amounts of disease. Environmental factors influence formulation performance since secondary spore formation is required.