Virus
Apple stem groove virus: what it is, how it originates, and how to eliminate it effectively.
Apple Stem Grooving Virus
Apple Stem Grooving Virus (Asgv)
Pathogen:
Virus
Type:
Risk to the plant:
INTERMEDIATE
DESCRIPTION
WHO CAUSES IT?
Apple stem grooving virus (ASGV) is a virus that affects apple trees and other pome fruit trees. The virus is primarily associated with apple stem grooving. ASGV is persistent in plants, and can be transmitted from generation to generation through grafts and infected seeds. It does not usually cause severe symptoms, but it can weaken plants over time.
SYMPTOMS
The disease caused by ASGV in apple trees is characterized by grooving of the stem and branches, which can cause weakening of the plant and a decrease in productivity. Symptoms may not appear immediately, but rather develop slowly over time.
• Longitudinal grooves in the stem and branches.
• Decrease in the quality of the fruits.
• General weakening of the plant.
• Regressive death of branches.
• Reduction in fruit production.
TEMPERATURE AND HUMIDITY
18°C - 25°C
60% - 80%
HOW IS IT SPREAD?
Grafts, infected seeds, direct contact with infected plants.
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)
Treatments allowed 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 DISEASE
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• Use certified virus-free propagation material.
• Disinfect grafting and pruning tools to avoid transmission.
• Carry out regular monitoring of crops to detect early symptoms.
• Avoid direct contact with infected plants.
• Control insect vector populations, if any, that can spread the virus.
• Maintain a clean environment free of plant debris.
• Plant varieties resistant or tolerant to the virus.
Recommendations
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