Take the Insect Analysis Report to Gracina Spiritmight in Darnassus.
I urge you to take this report to someone who has working knowledge in this kind of thing.
I know this night elf scholar named Gracina Spiritmight. She's spent a lot of time studying life forms that are unique to the ecology of Azeroth; she's a historian to boot! If you want someone to help figure out what exactly this threat is, and more importantly how to stop it, give her the report. We'll need the help.
Last I heard, she was residing in the Temple of the Moon, located in Darnassus.