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Disease Note

Fruit Rot of Wax Apple Caused by Phytophthora palmivora. C. C. Lin, Fengshan Tropical Horticultural Experiment Station TARI, Fengshan, Kaohsiung. D. N. Wang, Fengshan Tropical Horticultural Experiment Station TARI, Fengshan, Kaohsiung, and H. S. Chang, Institute of Botany, Academia Sinica, Taipei, Taiwan. Plant Disease 68:351, 1984. Accepted for publication 16 December 1983. Copyright 1984 The American Phytopathological Society. DOI: 10.1094/PD-68-351b.

In 1982, a previously unreported fruit rot of wax apple (Syzygium samarangense Merr. & Perry) was noticed in southern Taiwan during the rainy periods. The water-soaked infected area eventually became covered by a whitish mycelial mass. A fungus with morphological characteristics indistinguishable from those of Phytophthora palmivora (Butler) Butler was consistently isolated from the diseased tissues. Inoculation of wax apple fruit with P. palmivora zoospores resulted in the same symptoms. P. palmivora was reisolated from the advancing margin of all artificially inoculated fruit.
Reference: Waterhouse, G. M. Commonw. Mycol. Inst. Pap. 92, 1963.