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Biological Control of Seedling Root Rot of Papaya Caused by Phytophthora palmivora. Wen- hsiung Ko, Assistant Professor, Department of Plant Pathology, University of Hawaii, Hawaii Agricultural Experiment Station, Hilo 96720; Phytopathology 61:780-782. Accepted for publication 3 February 1971. DOI: 10.1094/Phyto-61-780.

Greenhouse tests confirmed the field observation that resistance of papaya roots to Phytophthora palmivora was directly correlated with the age of the plant. Excellent control of seedling root rot of papaya caused by this fungus was obtained by planting seeds in small quantities of pathogen-free virgin soil placed in infested fields.

Additional keywords: unspecialized parasites, Carica papaya.