The insects need to stick to the surface after the application of a very light pressure to the surface of the glue. In addition to this demand we also want the boards to be handled easily at a wide variety of temperatures; from close to 0 up to 65 (even up to 80) degrees Celsius.
Not only the glue needs to be of excellent quality, but also the actual board must be optimised for this task. It needs to be strong enough and may not deform over time.