Question: query about tomato leaf curl virus.
Answer: spray neem oil @ 5ml/litre of water or azadirachtin @ 2ml/litre of water. 
time of sowing of tomato: october-november.
variety: punjab chhuhara, s-12, punjab kesri, pusa early dwarf, sioux, pusa ruby, arka abha, arka alok and bt-1.