Powdery mildew is a fungal disease that affects a wide range of plants, causing white to gray powdery growth on the leaves, stems, flowers, and fruits. It is one of the most common plant diseases and can be found on both indoor and outdoor plants. It is caused by the fungus Uncinula necator, which forms a white powdery growth on the leaves, shoots, flowers, and fruit of grapevines. Powdery mildew can reduce grape yields and quality, and it can also make the grapes more susceptible to other diseases.
- Type of Infestation: Disease
- Common Name: Powdery Mildew
- Causal Organism: Uncinula necator
- Affected Parts Of the plant: Leaves, Shoots, Flower, and Fruit
Environmental favorable factors for pests/Diseases:
- Temperature: Powdery mildew thrives in moderate temperatures, typically between 68°F and 86°F (20°C and 30°C). It is less common in very hot or very cold weather.
- Humidity: High relative humidity (above 90%) is ideal for powdery mildew growth. This is because the fungus needs moisture to germinate and grow.
Symptoms of Pest/Disease:
- White powdery growth on leaves, shoots, flowers, and fruit
- Stunted leaves
- Curling and distortion of leaves
- Reduced fruit set
- Cracking and splitting of fruit
Measures to control Pests/Diseases:
| Products | Technical Names | Dosages |
|---|---|---|
| KTM | Thiophanate Methyl 70% WP | 250-600 grams per acre |
| CONCOR | Difenconazole 25 % EC | 120 ml - 150 ml / Acre |
| AZOXY | Azoxystrobin 23 % sc | 200 ml/acre |
| Hexa 5 Plus | Hexaconazole 5 % SC | 200-250 ml per acre |
| SULVET | Sulphur 80 % wdg | 750 to 1000 grams per acre |
