negative on the catapillars and grasshoppers , inside and sealed environment. Haven't seen any gnats , but not ruling any doubt that it might be a bug ,but don't know how to check? There in there 2nd week of flower and can't just flip on the light every other night to see if i catch them crawling around on my lady. So any sugestions what else it might be or how to catch me some weed munching parasites?