Effective Management of Downy & Powdery Mildew in Vegetable Crops
Effective Management of Downy & Powdery Mildew in Vegetable Crops
A) DOWNY MILDEW :
B) POWDERY MILDEW:
🔸️Powdery mildew appears as a white, powdery substance on the surface of leaves, while
🔸️Downy mildew causes yellowish-green spots on the upper leaf surface with a fuzzy, grayish-white growth underneath. Downy mildew thrives in cool, humid conditions, while
🔸️Powdery mildew prefers drier conditions.
A) DOWNY MILDEW:
▪️Appearance : Causes angular, yellowish-green spots on the upper leaf surface, with a downy, grayish-white growth underneath (on the underside of the leaf).
▪️Environment : Favors cool, damp conditions with high humidity and wet leaves.
▪️Causative Organism : Caused by oomycetes, which are fungus-like organisms.
▪️Infection : Can penetrate plant tissues, leading to more severe damage, including browning, defoliation, and plant death.
▪️Spread : Spores are spread by wind and splashing water.
▪️Temperature : Cool temperatures are ideal, generally between 15-23°C (59-73°F).
▪️Humidity : High humidity, above 85%, is crucial for spore production and infection.
▪️Moisture : Free moisture (like rain or dew) on leaves is essential for spore germination and infection.
B) POWDERY MILDEW :
▪️Appearance : Forms a white, powdery coating, typically on the upper surfaces of leaves, but can also be found on stems and other parts.
▪️Environment : Thrives in dry, warm conditions with moderate humidity.
▪️Causative Organism : Caused by various fungi, with many being host-specific.
▪️Infection : Typically remains on the surface of the plant and doesn't penetrate deeply into the tissues.
▪️Spread : Spores are spread by wind and can survive on plant debris.
▪️Temperature : Moderate temperatures, typically 20-30°C (68-86°F), are optimal.
▪️Humidity : High humidity (above 45%) is preferred, but free moisture on leaves isn't necessary for development.
▪️Moisture : Rainfall is not required, and the disease can still thrive in dry conditions, unlike downy mildew.
🔹Powdery Mildew:
Name | Mode of Action | Dose per Pump
Luna Systemic 20 ml
Experience
Antracol Contact 30 gm
Nativo Systemic 10 gm
🔹Products for Downy Mildew:
Name | Mode of Action | Dose per Pump
Aliette Systemic 30 gm
Infinito Systemic 40 gm
Nativo Systemic 10 gm
MelodyDuo Systemic 30gm
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