it COULD be some small slugs. Not that likely but nevertheless, check around your place.
http://goo.gl/tW92HB
http://goo.gl/tW92HB
In general, many insecticides are photodegradable , so it is better to spray at night. It seems to be when a lot of the feeding occurs, but it is more because it gives the chemicals time to work before being broken down by light.
Look at every single stem top to bottom ..I bet u one of those stems is not a stem its a green bug. Rub your hand up each one. Sometimes their defense is to freeze not jump or crawl when u frighten them and as a human our eyes are attracted to movement as our defense mech. So if they dont move we dont notice them.
I hate to keep adding things as im only offering options .. .no fly pest strips in veg are supposed to kill all not just flying things.. and i would have taken them to shower and hosed em off already. What have you got to lose.