Control of Cucumber Powdery Mildew Using Resistant Cultivars and Organic Agricultural Materials

Area of Science:

• Agricultural Science
• Plant Pathology
• Environmental Science

Background:

• Cucumber powdery mildew (CPM) is a significant disease affecting greenhouse cucumber production.
• Effective and sustainable disease management strategies are crucial for minimizing crop losses.

Purpose of the Study:

• To evaluate the efficacy of inorganic materials, biological control agents, organic agricultural materials (OAMs), and essential oils against CPM.
• To identify potential components for integrated pest management (IPM) strategies in cucumber cultivation.

Main Methods:

• Greenhouse experiments were conducted to assess various treatments including inorganic compounds (silicate, bicarbonate, copper sulfate, sulfur), biological agents (Bacillus strains), OAMs (loess-sulfur), and essential oils.
• Disease control efficacy was monitored and compared across different treatment groups.

Main Results:

• Bordeaux mixtures and sulfur-based compounds demonstrated reliable CPM control among inorganic materials.
• Bacillus strains (KB-401, M27) provided sustained disease suppression.
• Chitosan combined with oxidated copper salt showed high efficacy, while loess-sulfur mixtures were effective preventively.
• Essential oils also exhibited significant CPM suppression potential, potentially requiring repeated applications.

Conclusions:

• Environmentally friendly treatments such as Bordeaux mixtures, Bacillus strains, chitosan formulations, and essential oils are effective against CPM.
• These findings support the integration of these agents into sustainable IPM programs for greenhouse cucumbers.
• Further research into optimizing combinations and application timing is recommended for enhanced disease management.