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Phytophthora fruit rot: black circular area on an avocado fruit caused by <I>Phytophthora cinnamomi,</I> identical to symptoms commonly caused by <I>P. citricola.</I>. — Phytophthora fruit rot: black circular area on an avocado fruit caused by Phytophthora cinnamomi, identical to symptoms commonly caused by P. citricola..
Credit: David Rosen