Thanks Frank for the great pictures. This will help a lot of folks when they open up their nesting trays.
Holes in mason bee cocoons that parasitic wasps have used to exit cocoons.
- Fruit fly pupae -a sticky mess.
- If the nesting tunnel is sticky , then this photo is of fruit fly larvae that have just arrived on the west coast ( of NA) over the past 2 years.
- Adult parasitic wasps inside a mason bee cocoon
- Young parasitic wasp pupae inside a mason bee cocoon