rust spots on 3 plants and one plant , the biggest, fastest grower has holey leaves

I have an eclectic garden in an outdoor greenhouse and this is my first outdoor grow. I am seeing things which I never saw before. I have 3 plants which are developing rust spots. And I have the holey leaf plant is a Skunk1. Picture 45 - blown up looks like it may tell the tale. I am feeding every four days 1/3cup Grow big , 1/2 cup Big Bloom to 5 gallons of water, but only use about 3 gallons per feed...and I test the ph before I feed them. Overall these clones have been in here 1 month, and I have 6 regenerated winter crops in full swing, and the growth plus leaf color is good. 2 plants do have some droopy, crispy leaves. 4 days ago I sprayed a solution of Captain Jacks just in case that was the reason for the holes. And since, is when I've noticed the rusty leaves on 3 plants. and it does seem like the newest Skunk1 aren't nearly as holy...Thank you in advance for your help. This is also my first big grow....I've only grown 12 plants in doors, and now I have 21 outdoors.

Catapillars or whiteflys. Check all the stems as this where they rest between feeds with a bright light and pull the suckers off and kill them. If whiteflys then use yellow sticky strips. The reason one plant is worse is because its not as healthy as the other one and more vulnerable to attack. This will almost kill the plants if not fixed.