I'm going to spray the blossoms with bT tonight after the pollinators have gone home and before I cover the plants. It seems the newly hatched tiny caterpillars hang out in the pollinated blooms and then mess with the growing fruit.
The three I found inside an infested cuke were a lot smaller than I expected for the amount of damage inside. Maybe 1/2" long, very thin and kind of stripey.
Well, I just found a great key from Texan A&M on identifying veg caterpillars and down below the key part are good photos. See page 10 for a pic of the pickle worm. It's bands of dots, not stripes!
https://lubbock.tamu.edu/files/2011/...etab_B6110.pdf