Answer: Sounds like stink bugs or potato beetles to me and why they were attracted to your plants after spraying has me stumped. It's always best to wait for insects to appear and then spray or handpick rather than to spray as a preventative measure. There's obviously something about the oil spray that is irresistable to the bugs. I would rinse them off with water from the hose or pick them off the plant and squish them. Blossom spray will help set the pollen and increase the number of fruits the flowers will develop. It isn't absolutely necessary. You can accomplish the same thing by sharply tapping the branch with open flowers. This will effectively transfer the pollen from the male to the female part of the flower and should result in fruit set. Good luck with your tomatoes!
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