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Abstract
Zoospores of Phytophthora palmivora Butler aggregated without encysting within 2 min when they were suspended in water (Ko & Chase, 1973). Such zoospore behaviour was temperature-dependent with an optimum temperature of 16 °C. Aggregate formation also depended on both zoospore concentration and depth of suspension. We now report a similar behaviour of zoospores of Phytophthora capsici Leonian in water. The interaction between zoospores of P. palmivora and P. capsici was also investigated.
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© Society for General Microbiology 1974