Question: query about wilting problem in tomato. 
Answer: ooze test to be done to identify the disease, either it is bacterial or fungal disease.
for fungal disease: spray saaf or ridomil gold @ 2ml/litre of water for 3 times at 5 days interval.
for bacterial disease: spray plantomycin or streptocycline @ 1g/5 litre of water for 3 times at 7 days interval.