Prevention
Like other diseases caused by viruses in plants, there is no mean to cure plants from LMV once they are infected. Prevention of LMV can however be relatively efficient based on:
- control of the absence of LMV in seed lots before trading; typically, ELISA is used and a rejection rate of 1 out of 30,000 seeds is applied;
- the use of the recessive resistance gene mo1; mo1 has two commercial alleles (mo1¹, formerly known as g, and mo1², formerly known as mo), both of which protect plants against LMV accumulation and, in some cases where LMV nevertheless accumulates, protect against symptom expression as well as prevents transmission through seed.
In the late twentieth century, a novel type of LMV appeared in lettuce crops around the world. It was called LMV-Most (mo1-breaking, Seed-Transmitted) to account for its ability to infect and to spread through seeds even in the presence of mo1. Therefore, LMV-Most can only be prevented by controlling seeds, which consumes time, effort and money.
Read more about this topic: Lettuce Mosaic Virus
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