Oídio
Powdery Mildew
Podosphaera Leucotricha
Pathogen:
Fungus
Type:
Risk to the plant:
INTERMEDIATE
DESCRIPTION
WHO CAUSES IT?
Podosphaera leucotricha is a phytopathogenic fungus that causes the disease known as powdery mildew in apple trees and other fruit trees. The fungus develops on the surface of leaves, shoots and fruits, forming a visible mycelium and a white or grayish layer of sporulation. Podosphaera leucotricha can overwinter as mycelium in infected buds and produce spores when conditions are favorable.
SYMPTOMS
Powdery mildew in apple trees manifests itself with the appearance of a white or grayish growth on the surface of the leaves, shoots and fruits. The disease can cause leaf deformation and wrinkling, as well as a reduction in the quality and quantity of the crop.
• White or grayish growth on leaves, shoots and fruits.
• Deformation and wrinkling of the leaves.
• Reduction in the quality and quantity of the harvest.
• Fruits with superficial lesions and reduction in commercial quality.
TEMPERATURE AND HUMIDITY
15°C - 25°C
60% - 80%
HOW IS IT SPREAD?
Air, contact with infected plants, contaminated tools.
HOW TO REMOVE IT?
Home remedies
There are no home treatments
Chemical treatments
• ORANGE OIL 60g/L [ME] P/S
• SULFUR 70% [SC] P/V
• SULFUR 72% [SC] P/V
• SULFUR 80% [SC] P/V
• SULFUR 82.5% [SC] P/V
• BOSCALIDE 25.2% + PYRACLOSTROBIN 12.8% [WG] P/P
• BUPIRIMATE 25% [EC] P/V
• CIFLUFENAMID 5.13% [EW] P/V
• DIFENOCONAZOLE 1.67% [EC] P/V
• FLUOPYRAM 20% + TEBUCONAZOLE 20% [SC] P/V
• FLUXAPYROXAD 30% [SC] P/V
• POTASSIUM HYDROGEN CARBONATE 99% [SP] P/P
• KRESOXIM-METHYL 50% [WG] P/P
• SOY LECITHIN
• MEFENTRIFLUCONAZOLE 7.5% [SC] P/V
• Penconazole 10% [EC] P/V
• PENCONAZOLE 20% [EW] P/V
• CALCIUM POLYSULPHIDE 38% [DC] P/V
• TEBUCONAZOLE 20% [EW] P/V
• TEBUCONAZOLE 25% [WG] P/P
• TETRACONAZOLE 10% [EC] P/V
• TETRACONAZOLE 12.5% [ME] P/V
• TETRACONAZOLE 4% [ME] P/V
Authorized treatments in organic farming
• ORANGE OIL 60g/L [ME] P/S
• SULFUR 70% [SC] P/V
• SULFUR 72% [SC] P/V
• SULFUR 80% [SC] P/V
• SULFUR 82.5% [SC] P/V
• POTASSIUM HYDROGEN CARBONATE 99% [SP] P/P
• SOY LECITHIN
• CALCIUM POLYSULPHIDE 38% [DC] P/V
Insect allies
PREDATORY MITES
LADYBUGS
LACEWINGS
PARASITIC WASPS
HOVERFLIES OR PARASITIC FLIES
PREDATORY BUGS
There are no natural allies
Mycodiplosis oidii (predatory mosquito)
EFFECTIVE PRODUCTS TO ELIMINATE THIS DISEASE
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• Use apple varieties resistant or tolerant to Podosphaera leucotricha.
• Practice proper pruning to improve air circulation and reduce humidity.
• Disinfect pruning tools and equipment to prevent the spread of the fungus.
• Apply specific fungicides following local recommendations.
• Avoid excess nitrogen fertilization, as it can favor the spread of the fungus.
• Carry out regular monitoring to detect and eliminate infected parts.
Recommendations
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