
Patata
How to recognize and combat early blight or alternariosis in potatoes
Early Blight Or Alternariosis
Fungus
Type:
Risk to the plant:
HIGH
Alternaria Solani / Alternaria Alternata
Pathogen:

Alternariosis
WHO CAUSES IT?
Alternaria solani and Alternaria alternata are phytopathogenic fungi that cause the disease known as early blight or alternariosis in potatoes. These fungi produce spores that spread through air, water and soil, infecting potato plants primarily in warm, humid conditions. The fungus can survive in soil and infected plant remains for long periods. During the growing season, spores can infect potato leaves, stems and tubers, causing significant damage.
SYMPTOMS
Early blight or alternariosis produces lesions on the leaves, stems and tubers of the potato. On leaves, symptoms include dark, concentric Taches, which can cause premature defoliation. On the stems, the fungus can cause lesions and weaken the plant. In tubers, infections can cause rot and reduce the quality of the crop.
• Dark, concentric Taches on the leaves.
• Injuries to the stems and weakening of the plant.
• Rot and lesions on the tubers.
• Premature defoliation and reduction in crop quality.



DEVELOPMENT CONDITIONS
Temperature:
20°C - 30°C
Humidity:
80% - 100%
HOW IS IT SPREAD?
Spores carried by air, water, soil, infected plant remains, contaminated growing tools.
HOW TO ELIMINATE IT?
Home 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.
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