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Summed toxic units were obtained by relating Daily Intakes to the Tolerable Daily Intakes defined by WHO [2] of 10,000 and 6,000 ng/kg body weight/day for [SIGMA]DDT and Endosulfan, respectively.
A procedure similar to that of Ali (1981) was used for laboratory evaluation of technical temephos (90% active ingredient, AI) and the biological insecticide Bti (potency: 7,468 International Toxic Units (ITU)/mg) against field-collected larvae of the predominant midge species.
ISRAELENSIS (7,468 INTERNATIONAL TOXIC UNITS [ITU]/MG) AND s-METHOPRENE (96% TECHNICAL MATERIAL) TO LATE THIRD/EARLY FOURTH INSTARS OF GLYPTGTENDIPES PARIPES AND GGELDICHIRGNGMUS CARUS COLLECTED FROM WETLANDS AT PONTE VEDRA BEACH, FLORIDA (JUL-OCT 2003).