Yellow. Sticky. Perfect. 
We love these for controlling soil gnats and leaf hoppers.  They are effective both in the greenhouse and in the garden, where we can stop the attack of leaf munching insects before they destroy our crops!
We have seen particularly great results for controlling lead hoppers on elecampane, golden anise hyssop and hollyhocks.
Contains 10 cards and plastic stakes. Photo of card on wooden stake for example purposes.  (wooden stake not included)