Virus, BROMOVIRIDAE, CUCUMOVIRUS .
Identification, Description, Biology, Epidemiology, Treatement, Possible misleading, Images
The common strains of the virus cause leaf mosaic symptoms. In early infection plant sterility or fruit malformation occurs.
In tomato certain strains cause partial or total loss.
The virus is transmitted to the within one minute after bite of an infected plant. Without any latency period the virus is transmitted to other healthy .
plants in the same way.
Persistence of CMV on the aphid is short (a few hours).
The main species reported as vectors are : Myzus persicae , Aphis gossypii , A. craccivora , A. fabae .
Weeds are the main source of CMV. The first aphid invasion in the field cause primary .
CMV foci in the crop. In early invasion CMV epidemics spreads very rapidly in the cucurbits.
No curative treatment is available. When only few plants are affected they should be removed. Pesticides have little or no effect on the spread of the epidemics.
-Protect the seedlings with a "garde -manger" fence or unwoven material.
-Remove the weeds in the field and its surroundings.
- Solarize the crop with thin thermic film wrap (transparent or opaque) which keeps the aphid populations at a distance (in the open field crops).
HYP3 on line : Species (scientific name), Diseases (common names), Glossary, Crops.