Answer: Prevention is everything, there is no treatment. Attempts to kill all insect vectors are futile. It only takes one bite from one carrier to transmit the virus. Instead, make your tomatoes unappealing to the leafhoppers. Cover young tomatoes in the spring with a light shade. It is not necessary for the shade cloth to seal the insects out. Leaf hoppers are desert insects and like warm sunny environments, they will avoid shaded plants.
Plant tomatoes late, after the leafhopper vectors are gone - (balance the need to avoid leafhoppers with the need to achieve production before the high temperatures in the summer or before the killing frosts of winter).
Eliminate nearby host weeds and infected plants to prevent transmission and spread of the virus.
Some resistant varieties of tomatoes have been introduced, but reports of successful resistance are variable.
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