questions: asking about bacterial wilt control measure in tomato. 
 answers: seed treatment: apply captan @ 2 gram per kg seed.
nursery: spray captan @ 2 gram per litre of water.
main field: spray streptomycin @ 2 gram per 10 litres of water.
                      apply- asafoetida-turmeric powder( 1gm asafoetida + 5gm turmeric powder in 10 liters of water) to drench the soil 3 
                      times i.e., at 15,30 and 45 days after transplanting.