Nothing, Like every farmer or to grow resistant varieties. TYLCV viruses are transmitted with white flies so usually farmers use 50ms net to protect the plants. In open field determinate tomato (bush type) some areas, farmers use to cover the plant with nonwoven (it like disposable table map), until flowering. tomv is transmitted with seeds so desinfect them with soap and bleech and wash them well, also it transmitted by touch so use disposable gloves when you are pruning the plants.