That looks like fusarium wilt.
Bacterial Wilt will hit a perfectly healthy looking plant and all of a sudden it just wilts without yellowing. It usually occurs in hot weather after a good bit of rain. Watering the plant won't help at all. It seems to be more common when plants are loaded with green fruits so it may be that carrying the heavy fruit load makes it more susceptible to Bacterial Wilt. I just don't know but I do know it predominantly takes down large healthy plants when they are looking their best. It is a real shock because it happens so fast with little or no warning. You might see a slight wilting one day and think a plant may need a bit of watering and the next day it might be totally wilted and limp. I have never seen a plant recover from it. I have seen plants hang on for a long time with fusarium wilt before eventually dying. Usually with fusarium wilt the bigger and healthier a plant is when it shows the first symptoms the longer it will survive.
Bill
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