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224.  Derived from:  Legner, E. F.  1985.  Risk categories of biological control organisms.  Proc. Calif. Mosq. & Vect. Contr. Assoc., Inc. 53:  79-82.




          Assigning natural enemies to decreasing environmental risk categories, e.g., Terrestrial vertebrates, zoopathogens, phytopathogens, phytophagous arthropods, terrestrial scavengers, aquatic vertebrates and invertebrates and arthropodophagous arthropods, may provide a realistic base for allocating research time to a particular group before importation.  However, the amount of research necessary to select the "Best" biological control candidates might be greater for the least environmentally hazardous categories.



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