Most insects could probably get through that netting. Some butterfly supply sites sell some "sleeves", however that are intended to protect the caterpillars if put over branches or smaller plants. Some people make their own also.
Example: http://www.bioquip.com/search/...
I would feel more optimistic about a bright future for man if he spent less time proving that he can outwit Nature and more time tasting her sweetness and respecting her seniority. E. B.White
Integrity can never be taken. It can only be given, and I wasn't going to give it up to these people. Gary Mowad
