Tomato farmers in Maharashtra and Karnataka have attributed the decline in their yields earlier this year to two distinct viruses. Those in Maharashtra reported that their tomato crops were adversely affected by the cucumber mosaic virus (CMV), whereas growers in Karnataka and other South Indian states attributed their losses to the tomato mosaic virus (ToMV). In the past three years, farmers cultivating tomatoes have observed a rise in the prevalence of these two viruses, resulting in varying degrees of crop damage, ranging from partial to total loss.
The two plant pathogens, despite having similar names and causing similar crop damage, actually belong to different viral families and have distinct modes of transmission. The tomato mosaic virus (ToMV) is a member of the Virgaviridae family and shares a close relationship with the tobacco mosaic virus (TMV). It affects various plants, including tomatoes, tobacco, peppers, and certain ornamental plants.
Transmission
Symptoms
Prevention and Control
On the other hand, the cucumber mosaic virus (CMV) has a much broader range of host plants. It can infect cucumber, melon, eggplant, tomato, carrot, lettuce, celery, cucurbits (such as squash, pumpkin, zucchini, and some gourds), as well as certain ornamental plants. The name “CMV” originated from its identification in cucumber back in 1934. It is worth noting that CMV has a wider host pool compared to ToMV.
Transmission:
Symptoms:
Prevention and Control:
Genome and Replication
Impact on Crop
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