Downy mildew is a plant disease caused by oomycetes, which are water molds related to algae but not true fungi. It is a common disease of many plants, including grapes, vegetables, fruits, and flowers. Downy mildew can cause significant yield losses and reduce the quality of crops.
- Type of Infestation: Fungal Disease
- Common Name: Downy Mildew
- Causal Organism: Peronospora parasitica
- Affected Parts Of the plant: Leaves, Stem
Environmental favorable factors for pests/Diseases:
- Cool temperatures (between 10-20°C)
- High humidity (over 80%)
- Poor air circulation
- Excessive watering or rainfall
Symptoms of Pest/Disease:
- Yellow or pale green spots on the upper surface of leaves, which may later turn brown or necrotic.
- A grayish-white, downy growth on the underside of leaves, corresponding to the yellow spots above.
- Stunted growth of the cabbage plant.
- Premature yellowing and dropping of leaves.
- Reduced head size and quality in mature cabbages.
Measures to control Pests/Diseases:
|
Products |
Technical Names |
Dosages |
|
Metalaxyl 8 % + Mancozeb 64 % wp |
1.5 to 2 kg per ha |
|
|
Mancozeb 75% WP |
500gmsl per Acre |
|
|
Carbendazim 12 % + Mancozeb 63 % WP |
300-400 grams per acre |
