Alternariosis
Alternariosis
Alternaria Sp.
Pathogen:
Fungus
Type:
Risk to the plant:
INTERMEDIATE
DESCRIPTION
WHO CAUSES IT?
Alternaria is a genus of fungi that includes several pathogenic species capable of affecting a wide range of ornamental and garden plants. These fungi are known to cause serious foliar diseases in many plant species, which can lead to defoliation and overall weakening of the plant. Alternaria species produce spores that spread easily through wind and water, contributing to their rapid spread under favorable conditions.
SYMPTOMS
The disease caused by Alternaria in ornamental and garden plants manifests itself with the appearance of dark brown or black leaf Taches on the leaves, stems and flowers of infected plants. These Taches usually have a necrotic center and lighter border, and may coalesce to cover large areas of the plant. Over time, the disease can cause premature defoliation and overall decline in plant health.
TEMPERATURE AND HUMIDITY
15°C - 25°C
60% - 80%
HOW IS IT SPREAD?
Wind, irrigation water, direct contact with plants, transport of plant material.
HOW TO REMOVE IT?
Home remedies
There are no home treatments
Chemical treatments
• AZOXISTROBIN 25% [SC] P/V
• CIPRODINIL 37.5% + FLUDIOXONIL 25% [WG] P/P
• DIFENOCONAZOLE 1.67% [EC] P/V
• FOLPET 50% [SC] P/V
• FOLPET 80% [WG] P/P
• CUPRIC HYDROXIDE 50% (EXPR. IN CU) [WP] P/P
• METIRAM 70% [WG] P/P
• COPPER OXYCHLORIDE 30% (EXPR. IN CU) [WP] P/P
• COPPER OXYCHLORIDE 35% (exp. in Cu) [WG] P/P
• COPPER OXYCHLORIDE 35% (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
• PIRACLOSTROBIN 6.7% + BOSCALIDE 26.7% ( ) [WG] P/P
• PIRACLOSTROBIN 6.7% + BOSCALIDE 26.7% (I) [WG] P/P
• CUPROCALCIC SULFATE 20% (EXPR. IN CU) [WG] P/P
• CUPROCALCIC SULFATE 20% (EXPR. IN CU) [WP] P/P
• TRIBASIC COPPER SULFATE 19% (EXPR. IN CU) [SC] P/V
Treatments allowed in organic farming
• CUPRIC HYDROXIDE 50% (EXPR. IN CU) [WP] P/P
• COPPER OXYCHLORIDE 30% (EXPR. IN CU) [WP] P/P
• COPPER OXYCHLORIDE 35% (exp. in Cu) [WG] P/P
• COPPER OXYCHLORIDE 35% (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
• CUPROCALCIC SULFATE 20% (EXPR. IN CU) [WG] P/P
• CUPROCALCIC SULFATE 20% (EXPR. IN CU) [WP] P/P
• TRIBASIC COPPER SULFATE 19% (EXPR. IN CU) [SC] 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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To prevent and control the spread of the disease caused by Alternaria in ornamental and garden plants, it is recommended to implement integrated pest management measures. This includes removing infected plant debris, maintaining good air circulation around the plants, drip irrigation instead of spraying, and timely application of preventive fungicides in case of environmental conditions favorable for the disease.
Recommendations
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