Virus
Cucumber mosaic virus (CMV): what it is, how it originates, and how to eliminate it effectively.
Cucumber mosaic virus (CMV)
CMV virus
Pathogen:
Virus
Type:
Risk to the plant:
HIGH
DESCRIPTION
WHO CAUSES IT?
Cucumber Mosaic Virus (CMV) is an RNA virus of the *Bromoviridae* family and the *Cucumovirus* genus, characterized by its wide host range and high dispersion capacity. It is distributed worldwide and affects numerous plant species, including economically important crops. Its structure consists of icosahedral particles with three segments of single-stranded RNA, each with specific functions in replication, movement, and suppression of the plant's immune response. Once the virus enters the plant cell, it disassembles and releases its genetic material into the cytoplasm. There, the viral RNA polymerase initiates the transcription and replication of the viral genomes, allowing the synthesis of structural and movement proteins. Through the plant's vascular system, the virus is transported to new cells, establishing a systemic infection. Its interaction with host cellular factors determines the severity of the symptoms and its ability to spread within the plant tissue.
SYMPTOMS
In banana trees, CMV causes a disease characterized by foliar symptoms and alterations in plant development. The infection interferes with normal physiology, affecting photosynthesis and nutrient transport, which can lead to a reduction in crop production and quality.
- Chlorosis and mosaic in young leaves.
- Deformations and reduction in leaf size.
- Necrosis on the margins of the leaves in severe infections.
- Delayed growth and reduction in the general vigor of the plant.
- Appearance of yellowish bands or chlorotic areas on the leaf blade.
- Loss of yield in fruit production.
TEMPERATURE AND HUMIDITY
18°C - 28°C
60% - 85%
HOW IS IT SPREAD?
Aphids, contaminated seeds, mechanical contact, infected grafts, contaminated agricultural tools
HOW TO REMOVE IT?
Home remedies
There are no home treatments
Chemical treatments
Il n'existe pas de traitements efficaces contre les virus, les traitements sont axés sur la lutte contre l'insecte ou le vecteur porteur du virus (VOIR TRAITEMENTS DISPONIBLES CONTRE LES INSECTES)
Treatments allowed in organic farming
Il n'existe pas de traitements efficaces contre les virus, les traitements sont axés sur la lutte contre l'insecte ou le vecteur porteur du virus (VOIR TRAITEMENTS DISPONIBLES CONTRE LES INSECTES)
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 virus-free propagation material to avoid the introduction of the pathogen into new plantations.
- Control aphid populations, the main vectors of CMV, through integrated pest management practices.
- Implement physical barriers, such as anti-insect mesh, to reduce the entry of vectors into crops.
- Promote biodiversity in crops through the use of repellent plants or traps to reduce the presence of transmitting insects.
- Apply treatments with mineral oils or insecticidal soaps to reduce the acquisition and transmission of the virus by insect vectors.
- Carry out periodic monitoring to detect the presence of the virus and take quick measures in case of infection.
- Avoid contact between infected and healthy plants, quickly eliminating affected plants to stop the spread of the virus.
- Maintain adequate nutritional and irrigation management to strengthen the natural resistance of the banana tree against viral infections.
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