Concur, TSWV is an insect vectored disease. Crop rotation, soil solarization are good practices for soil borne diseases but nigh unto useless for TSWV. Weed elimination is useful but it has so many host don't count on it. The thrip( several species) are not strong flyers but they can move long distances. The adult thrip has to acquire the virus at the larval stages which probably accounts for the intermittant nature of the disease in some areas. Here it is pretty persistant.
http://vegetablemdonline.ppath...
