The whitefly is eating me alive... When I was starting them off, I was able to keep the whitefly somewhat—though not completely—in check... On the patio, however, they’ve taken over all the tomato, chili, and bell pepper plants. I’ve never had this pest before... and with so many plants, I don’t think I stand a chance. What damage do they cause? And how can I prevent them from coming back next year?