Before one can apply Integrated Pest Management in the greenhouse with biological controls (Part I), one must be able to distinguish the beneficial from the das... » 

Before one can apply Integrated Pest Management in the greenhouse with biological controls (Part I), one must be able to distinguish the beneficial from the dastardly. Gill (U. of Maryland Cooperative Extension Service) and Sanderson (entomology, Cornell U.) explain how to collect pest and plant dam «