BCDay, no I don't mean anything large like bees and butterflies. More like tiny wasps and flies. Less than 1/8 "--I could never really ID them as they are so mashed on the card but definately not thrips. More gnat-like. (Like Michele says tiny black bugs with wings.)
I just decided since I really wasn't catching any thrips I didn't want to use the cards and risk eliminating possible beneficials.
(Reminded me of those bug zappers where it was found they kill far more beneficial insects than mosquitoes. They can even increase the number of female mosquitoes which are the ones that actually bite. {Cornell} )
This has been my experience--as I said I never really see all that many thrips anyway when I did get TSWV. If a person really is catching alot of thrips it would be worth it but I think you need a hand lens to know for sure.
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"When we kill off the natural enemies of a pest we inherit their work."
Carl Huffaker
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