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Damping-Off
Causal Agents: (fungi - Rhizoctonia solani, Pythium spp.)
Seedlings wilt and die. The lower stems have a watersoaked appearance. Damping-off is usually a problem of direct-seeded watermelons germinating in cool, moist soil [Picture], but Pythium aphanidermatum can rapidly kill new transplants in warm soils [Picture]. A soil application of mefenoxam (Ridomil Gold) at the time of planting will prevent damping-off caused by Pythium species.