
Cebolla
How to recognize and combat leaf blight in onions
Leaf Blight
Fungus
Type:
Risk to the plant:
HIGH
Stemphylium Vesicarium
Pathogen:

Micosis/Hongos
WHO CAUSES IT?
Stemphylium vesicarium is a phytopathogenic fungus that affects various crops, including onion, causing a disease known as leaf blight. This fungus can survive in the remains of infected plants and in the soil. It produces spores (conidia) that spread easily through the air, infecting new plants. The fungus thrives in humid, warm conditions, and the spores can be dispersed through water droplets and wind, promoting the spread of the disease.
SYMPTOMS
Leaf blight caused by Stemphylium vesicarium on onions manifests itself with the appearance of brown or necrotic Taches on the leaves. The lesions can expand and join together, causing wilting of the leaves and reduced photosynthetic capacity of the plant.
• Brown or necrotic Taches on onion leaves.
• Lesions may expand and cause wilting of leaves.
• Reduction in the photosynthetic capacity of the plant.
• Decrease in the quality and quantity of the harvest.


DEVELOPMENT CONDITIONS
Temperature:
20 ºC - 28ºC
Humidity:
80% - 100%
HOW IS IT SPREAD?
Air, water, remains of infected plants, contact with contaminated 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.









