A devastating disease, which there is no method for treatment, the tobacco ringspot virus is a real pain-in-neck for horticulturists and can cause serious damage. However, prevention is highly possible and it's the only way that you'll survive this plant disease which is transmitted by dagger nematodes, microscopic worms as well as by tobacco thrips and flea beetles. One way of managing tobacco ringspot is by testing the soil for dagger nematodes and then applying pesticide to treat it if needed.

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Source: Gardening Know How