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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