Curling leaves with purple veins on back may indicate curly top virus, but you need to rule out other possibilities. Though it’s not catching from plant to plant, a beet leaf hopper, feeding on an infected plant, can transfer the virus to healthy plants. Dry conditions in June, lack of shade, or lack of row cover contribute to susceptibility. One solution is to plant tomatoes later. All this according to giant veggie gardener in Santa Fe.
Valencia Community Gardens
Teaching the community about gardening
