Powdery mildew is a common fungal disease that can infect a wide range of plants, including cucurbits such as cucumbers, melons, squash, and pumpkins. It is caused by several different species of fungi, but the most common ones that affect cucurbits are Podosphaera xanthii and Erysiphe cichoracearum.
- Light infection: May cause minimal yield loss (5-10%), mostly affecting cosmetic quality.
- Moderate infection: Can reduce yield by 15-30%, impacting both fruit size and quantity.
- Severe infection: Can lead to substantial yield losses (40-70%), with stunted growth, premature defoliation, and reduced fruit set and quality.
- Type of Infestation: Disease
- Common Name: Powdery Mildew
- Causal Organism: Podosphaera xanthii
- Affected Parts Of the plant: Fruit, Flower, Leaves
Environmental favorable factors for pests/Diseases:
- Warm, humid weather
- Poor air circulation
- Crowded plants
- Excess nitrogen fertilizer
Symptoms of Pest/Disease:
- White, powdery growth on leaves, stems, and fruits
- Yellowing and stunting of leaves
- Leaves may eventually curl, drop off, and die
- Reduced fruit size and quality
Measures to control Pests/Diseases:
| Products | Technical Names | Dosages |
| SULVET | Sulphur 80 % wdg | 750 to 1000 grams per acre |
| AZOXY | Azoxystrobin 23 % sc | 200 ml/acre |
| Samartha | Carbendazim 12 % + Mancozeb 63 % WP | 300-400 grams per acre |
| KTM | Thiophanate Methyl 70% WP | 250-600 grams per acre |
