 In vitro, "D. bryoniae" does not form pycnidia without UV-light but if cultured in the presence of UV light and darkness, conidia/pycnidiospores produce mycelium rapidly [6].The standard management practice for "D. bryoniae" is to use pesticide treated/pathogen-free seeds and to rotate crops on a 2-year cycle to reduce inoculum prevalence [2].There are no commercially acceptable resistant cucumbers, melons or watermelons available yet on the market, but some plant breeders have identified "D. bryoniae" resistant genes, such as the gene "db" in watermelon [2,11].