Summary: Zoospores of Phytophthora palmivora suspended in water aggregated within 2 min at 16°C. Individual spores in aggregates were separate and actively swimming. The optimum temperature for aggregation was 16°C. Aggregate formation depended on zoospore concentration and depth of suspension.
AragakiM., HineR. B.1963; Effect of radiation on sporangial production of Phytophthora parasitica on artificial media and detached papaya fruit.. Phytopathology 53:854–856