Pests and flies in the greenhouse roof

I have a small, temporary plastic greenhouse, growing tomatoes, chillies and peppers.
I've left the doors open on the greenhouse today, what with it being a gorgeous, summer like day. Then this evening I noticed that all sorts of flying insects were trapped in the upper part of the house, obviously unable to find their way out. These included a bee, a hoverfly, loads of small flies, some wierd looking flying insects I couldn't identify, and a few tiny ones.
Do I just leave them all there? I love bees so I managed to trap him and release him, but do I just leave the others in there?

 

I answered my own question by closing up the greenhouse for a day or two... once I opened it up for watering they were all dead. Cheers anyway.

 

How about investing in some carnivorous plants. We have been looking at this site and it looks mega interesting and not too expensive so we will defo be trying a few of these babies out! http://plants-a-float.com/index.php?main_page=index&cPath=1&zenid=8305dbe7235da1a52d9d13f8d64906a8

 

Canucks72 you want to encourage hoverflies, not kill them.:gnthb:

 

Peteandjayne, that is an excellent link. :gnthb: Thankyou