Virus
Beet Moderate Yellowness Virus
Beet Mild Yellowing Virus (Bmyv)
Pathogen:
Virus
Type:
Risk to the plant:
INTERMEDIATE
DESCRIPTION
WHO CAUSES IT?
Beet Mild Yellowing Virus (BMYV) is a virus that primarily affects beet plants, causing a disease known as beet mild yellowing virus. This virus belongs to the Polerovirus genus, within the Luteoviridae family. BMYV is a positive-sense single-stranded RNA virus. Its cycle begins when an aphid, the main vector, feeds on an infected plant, thus acquiring the virus. Aphids transmit the virus to new plants during feeding. Within the beet plant, BMYV replicates in phloem cells and moves through the vascular system, interfering with nutrient transport and causing the characteristic symptoms of the disease. Viral replication and spread are facilitated by proteins encoded by the virus, which contributes to the spread of the pathogen within the plant.
SYMPTOMS
The beet moderate yellowness virus produces a series of symptoms in beet plants that affect their development and yield. The first signs of the disease include slight yellowing of the leaves, which may go unnoticed in the early stages. As the infection progresses, the yellowing spreads and may intensify, affecting plant growth and productivity. Infected plants may also exhibit leaf curling and a general reduction in vigor.
- Slight yellowing of the leaves
- Extension of yellowing throughout the plant
- Leaf curling
- Reduction of plant vigor
- Decreased growth
- Lower crop yield
TEMPERATURE AND HUMIDITY
18°C - 24°C
65% - 80%
HOW IS IT SPREAD?
Aphids, infected plant sap, contaminated tools, infected seeds
HOW TO REMOVE IT?
Home remedies
There are no home treatments
Chemical treatments
There are no effective treatments against viruses, the treatments are focused on combating the insect or vector carrying the virus (SEE AVAILABLE TREATMENTS AGAINST INSECTS)
Authorized treatments in organic farming
There are no effective treatments against viruses, the treatments are focused on combating the insect or vector carrying the virus (SEE AVAILABLE TREATMENTS AGAINST INSECTS)
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 PEST
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Effective against all types of fungi
- Use beet varieties resistant or tolerant to BMYV to reduce susceptibility to the disease.
- Implement an integrated pest management program that includes aphid control through the use of selective insecticides and biological strategies such as promoting natural enemies of aphids.
- Practice crop rotation with non-BMYV host species to reduce disease pressure in the field.
- Maintain good fertilization and irrigation management to reduce stress on plants, which can reduce their susceptibility to the virus.
- Regularly monitor crops to detect the presence of aphids and disease symptoms early.
- Remove and destroy infected plants to prevent the spread of the virus to healthy plants.
- Disinfect agricultural tools and machinery used in infected fields to prevent the spread of the virus.
- Avoid overapplication of insecticides to prevent the development of resistance in aphid populations and maintain the effectiveness of chemical controls.
Recommendations
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