http://imgur.com/a/WwoT0

Hey all, I've recently noticed a few holes on my Northern Lights plant. This is a guerilla grow alongside another plant, Cheese. Cheese has no holes, and it's about 2ft to the left of this one. Any ideas?

Also, this is the first grow I've had going successfully this far along; what are some good anti-bug sprays that I can use that won't harm the plant?