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Apple Scab Or Mottle
Venturia Inaequalis
Pathogen:
Fungus
Type:
Risk:
HIGH
Moteado
WHO CAUSES IT?
Venturia inaequalis is a phytopathogenic fungus that causes the disease known as apple scab. The fungus can survive on fallen leaves and infected plant remains, especially during winter, in the form of reproductive structures such as ascospores. These ascospores are released in spring and spread through the air to infect new leaves, flowers, and fruits. The fungus develops on leaves, fruits and shoots, forming lesions that can expand rapidly.
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SYMPTOMS
Apple scab produces dark, superficial lesions on leaves, flowers and fruits, which can cause deformation and premature fall of the leaves and fruits. These injuries can also reduce the commercial quality of the crop.
• Dark and superficial lesions on leaves, flowers and fruits.
• Deformations in leaves and fruits.
• Premature fall of leaves and fruits.
• Reduction in the commercial quality of the harvest.
TEMPERATURE AND HUMIDITY
15°C - 25°C
60% - 80%
TRANSMISSION PATHS
Air, contact with infected plants, plant remains, contaminated tools.
TREATMENTS
Chemical treatment
• SULFUR 72% [SC] P/V
• BOSCALIDE 25.2% + PYRACLOSTROBIN 12.8% [WG] P/P
• CAPTAN 47.5% [SC] P/V
• CAPTAIN 80% [WG] P/P
• CIPRODINIL 18.75% + TEBUCONAZOLE 12.5% [EC] P/V
• CIPRODINIL 30% [EC] P/V
• CIPRODINIL 37.5% + FLUDIOXONIL 25% [WG] P/P
• Cyprodinil 50% [WG] P/P
• DIFENOCONAZOLE 1.67% [EC] P/V
• DIFENOCONAZOLE 25% [EC] P/V
• Dithianone 12.5% + Potassium phosphonates 56.1% [SC] P/V
• DITIANONE 25% + PYRIMETANIL 25% [SC] P/V
• DITHIANONE 50% [SC] P/V
• DITHIANONE 70% [WG] P/P
• DODINA 40% [SC] P/V
• DODINA 54.4% [SC] P/S
• FLUOPYRAM 20% + TEBUCONAZOLE 20% [SC] P/V
• FLUXAPYROXAD 30% [SC] P/V
• POTASSIUM PHOSPHONATES 50.4% (exp. as phosphorous acid) [SL] P/V
• POTASSIUM PHOSPHONATES 66% + CAPTAN 36% [SC] P/V
• POTASSIUM HYDROGEN CARBONATE 0.425% [AL] P/V
• POTASSIUM HYDROGEN CARBONATE 85% [SP] P/P
• POTASSIUM HYDROGEN CARBONATE 99% [SP] P/P
• CUPRIC HYDROXIDE 13.6% (EXPR. IN CU) + COPPER OXYCHLORIDE 13.6% (EXPR. IN CU) [SC] P/V
• CUPRIC HYDROXIDE 20% (EXPR. IN CU) [WG] P/P
• CUPRIC HYDROXIDE 25% (EXPR. IN CU) [WG] P/P
• CUPRIC HYDROXIDE 30% (EXPR. IN CU) [WG] P/P
• CUPRIC HYDROXIDE 35% (EXPR. IN CU) [WG] P/P
• CUPRIC HYDROXIDE 36% (EXPR. IN CU) [SC] P/V
• CUPRIC HYDROXIDE 40% (EXPR. IN CU) [WG] P/P
• CUPRIC HYDROXIDE 50% (EXPR. IN CU) [WG] P/P
• KRESOXIM-METHYL 25% + DIPHENOCONAZOLE 12.5% [WG] P/P
• KRESOXIM-METHYL 50% [WG] P/P
• LAMINARIN 4.5% [SL] P/S
• METIRAM 70% [WG] P/P
• COPPER OXYCHLORIDE (Exp. in Cu) 52% [SC] P/V
• COPPER OXYCHLORIDE 14% (exp. in Cu) + CUPRIC HYDROXIDE 14% (exp. in Cu) [WG] P/P
• COPPER OXYCHLORIDE 25% (EXPR. IN CU) [WG] P/P
• COPPER OXYCHLORIDE 30% (EXPR. IN CU) [WP] P/P
• COPPER OXYCHLORIDE 35% (exp. in Cu) [WG] P/P
• COPPER OXYCHLORIDE 37.5% (EXPR. IN CU) [WG] P/P
• COPPER OXYCHLORIDE 38% (EXPR. IN CU) [SC] P/V
• COPPER OXYCHLORIDE 50% (EXPR. IN CU) [WP] P/P
• COPPER OXYCHLORIDE 52% (EXPR. IN CU) [SC] P/V
• COPPER OXYCHLORIDE 70% (EXPR. IN CU) [SC] P/V
• CUPROUS OXIDE 50% (EXPR. IN CU) [WP] P/P
• CUPROUS OXIDE 75% (EXPR. IN CU) [WG] P/P
• CALCIUM POLYSULPHIDE 38% [DC] P/V
• CUPROCALCIC SULFATE 12.4% (EXPR. IN CU) [SC] P/V
• CUPROCALCIC SULFATE 20% (EXPR. IN CU) [WG] P/P
• TEBUCONAZOLE 20% [EW] P/V
• TEBUCONAZOLE 25% [EW] P/V
• TETRACONAZOLE 10% [EC] P/V
• TETRACONAZOLE 12.5% [ME] P/V
• TETRACONAZOLE 4% [ME] P/V
• TRIFLOXISTROBIN 50% [WG] P/P
Authorized treatments in organic farming
• SULFUR 70% [SC] P/V
• SULFUR 72% [SC] P/V
• POTASSIUM PHOSPHONATES 50.4% (exp. as phosphorous acid) [SL] P/V
• POTASSIUM HYDROGEN CARBONATE 0.425% [AL] P/V
• POTASSIUM HYDROGEN CARBONATE 85% [SP] P/P
• POTASSIUM HYDROGEN CARBONATE 99% [SP] P/P
• CUPRIC HYDROXIDE 13.6% (EXPR. IN CU) + COPPER OXYCHLORIDE 13.6% (EXPR. IN CU) [SC] P/V
• CUPRIC HYDROXIDE 20% (EXPR. IN CU) [WG] P/P
• CUPRIC HYDROXIDE 25% (EXPR. IN CU) [WG] P/P
• CUPRIC HYDROXIDE 30% (EXPR. IN CU) [WG] P/P
• CUPRIC HYDROXIDE 35% (EXPR. IN CU) [WG] P/P
• CUPRIC HYDROXIDE 36% (EXPR. IN CU) [SC] P/V
• CUPRIC HYDROXIDE 40% (EXPR. IN CU) [WG] P/P
• CUPRIC HYDROXIDE 50% (EXPR. IN CU) [WG] P/P
• LAMINARIN 4.5% [SL] P/S
• COPPER OXYCHLORIDE (Exp. in Cu) 52% [SC] P/V
• COPPER OXYCHLORIDE 14% (exp. in Cu) + CUPRIC HYDROXIDE 14% (exp. in Cu) [WG] P/P
• COPPER OXYCHLORIDE 25% (EXPR. IN CU) [WG] P/P
• COPPER OXYCHLORIDE 30% (EXPR. IN CU) [WP] P/P
• COPPER OXYCHLORIDE 35% (exp. in Cu) [WG] P/P
• COPPER OXYCHLORIDE 37.5% (EXPR. IN CU) [WG] P/P
• COPPER OXYCHLORIDE 38% (EXPR. IN CU) [SC] P/V
• COPPER OXYCHLORIDE 50% (EXPR. IN CU) [WP] P/P
• COPPER OXYCHLORIDE 52% (EXPR. IN CU) [SC] P/V
• COPPER OXYCHLORIDE 70% (EXPR. IN CU) [SC] P/V
• CUPROUS OXIDE 50% (EXPR. IN CU) [WP] P/P
• CUPROUS OXIDE 75% (EXPR. IN CU) [WG] P/P
• CALCIUM POLYSULPHIDE 38% [DC] P/V
• CUPROCALCIC SULFATE 12.4% (EXPR. IN CU) [SC] P/V
• CUPROCALCIC SULFATE 20% (EXPR. IN CU) [WG] P/P
Traitements biologiques
• BACILLUS SUBTILIS (strain IAB/BS03) (1 x 10E8 cfu/g) 1% [WP] P/P
• BACILLUS SUBTILIS (strain IAB/BS03) (1 x 10E8 cfu/ml) 10 g/l [SL] P/V
Recommendations
• Use apple varieties resistant or tolerant to Venturia inaequalis.
• Practice proper pruning to improve air circulation and reduce moisture in the foliage.
• Remove and destroy fallen leaves and remains of infected plants to reduce the inoculum.
• Apply specific fungicides following local recommendations, especially during spring.
• Disinfect pruning tools and equipment to prevent the spread of the fungus.
• Carry out regular monitoring to detect and eliminate infected parts.
TREATMENTS
Homemade treatments
- There are no home treatments
Natural allies
Chemical treatments
- There are no treatments for this disease. Treatments are directed at the insect vectors that transmit it. See insect treatments.
RECOMMENDATIONS
- Avoid wetting the leaves when watering and do it early in the day.
- Prune interior branches to improve ventilation.
- Remove and destroy leaves and fruits that have fallen to the ground.
- Use resistant varieties if available.
- Apply preventive treatments with natural fungicides such as copper or sulfur.
- Check your plants frequently in humid times.
REPELLENT PLANTS
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RECOMMENDED PRODUCTS
*The recommended treatments are still recommendations according to the databases of the authorities and at no time do they replace the guidelines established according to the legislation of each country
*The products shown are recommendations and are not our own products. As Amazon Associates, we earn revenue from purchases of recommended products.
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