Downy mildew of Cucurbits
or surviving mycelium sporangia are formed, structures in which zoospores are produced. However, in downy mildews, sporangia often germinate directly and [...] the stomata or directly by penetrating the cuticula. For germination free water is required. For most downy mildews, the optimum temperature is around [...] density, good aeration during propagation and maintaining a warm and dry climate in greenhouses. Use hygiene measures. Start clean, remove crop residues and prevent