Virus
Potato leaf curl virus: what it is, how it originates, and how to eliminate it effectively.
Potato Leaf Curl Virus
Potato Leafroll Virus (Plrv)
Pathogen:
Virus
Type:
Risk to the plant:
HIGH
DESCRIPTION
WHO CAUSES IT?
Potato leafroll virus (PLRV) is a virus that affects potato and other vegetable crops, causing the disease known as potato leafroll virus. The virus is transmitted mainly by the potato aphid (Myzus persicae) and other aphid vectors. Once the virus infects a plant, it spreads systematically through its tissues, leading to the manifestation of visible symptoms. The virus can also survive in infected tubers and potato plants that act as reservoirs.
SYMPTOMS
The disease caused by PLRV causes symptoms that affect both the development and production of the potato. Symptoms include upward curling of leaves, yellowing or reddening of leaves, and a reduction in plant growth and development. These symptoms reduce the productivity of the plant and the quality of the tubers.
• Upward curling of the leaves.
• Yellowing or redness of the leaves.
• Reduction in plant growth and development.
• Reduction in the quality and quantity of tubers.
TEMPERATURE AND HUMIDITY
15°C - 25°C
50% - 80%
HOW IS IT SPREAD?
Aphid vectors, contact with infected tubers, 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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• Before considering the presence of the virus, it must be verified that the rolling of the leaves is not due to the presence of insects such as aphids, thrips or mites.
• Use potato varieties resistant or tolerant to PLRV.
• Control aphid vector populations using specific insecticides or biological methods.
• Carry out crop rotations to avoid the accumulation of vectors and viruses in the soil.
• Regularly inspect plants for early signs of infection and remove infected plants.
• Avoid reusing infected potato seeds and only use certified seeds.
• Apply integrated pest management measures to keep aphid populations under control.
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