Final diagnosis


Cucumber mosaic virus (CMV)

Cucumber mosaic virus (CMV)
Young leaves show vein yellowing and a classic, distorting mosaic pattern. Cucumber mosaic virus (CMV)
The lamina tip of this mosaic infected leaf is very slender. Cucumber mosaic virus (CMV)
The latest formed leaves are more filiform, some have only their midrib. Cucumber mosaic virus (CMV)
Chlorotic leaf with several large darker blisters, and occasionally overcoming the veins. Cucumber mosaic virus (CMV)
Leaf mosaic. Cucumber mosaic virus (CMV)
A slightly blistered tobacco leaf with mosaic. Cucumber mosaic virus (CMV)
Marked mosaic pattern on a dark tobacco leaf. Cucumber mosaic virus (CMV)
Mosaic patterns consisted of small yellow spots (beaded mosaic). Cucumber mosaic virus (CMV)
A few yellow spots can be observed on lower leaves of this Burley tobacco. Cucumber mosaic virus (CMV)
Large chlorotic and irregular patterns on a Virginia tobacco leaf that progressively become necrotic (line pattern).
On mature dark tobacco leaves the necrotic lines are irregularly following the main veins creating an oak leaf pattern. Cucumber mosaic virus (CMV)
The whole lamina is covered by marked and well defined necrotic interveinal patterns. Cucumber mosaic virus (CMV)
On these cured leaves one can easily observe brown necrotic lines following the main veins thus telling about an ancient attack of CMV (cucumber mosaic virus)
The viral particles of cucumber mosaic virus (CMV) are isometric, they are about 29 nm in diameter.