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Chlorfluazuron (Atabron) is an insect growth regulator (IGR) used forcontrolling the major stored product pests. This study investigate the effect ofChlorfluazuron on both sexes of Tribolium castaneum which resulted from treated 4thlarval instar with LC50 values (1.2ppm for 4th larval instar).The maximum production and perception of pheromone on both sexes resultedfrom treated 4th larval instar were at 8-10 days old while at 4-6 days old in untreatedsexes.The maximum and minimum pheromone production and perception by sexesresulted from treated 4th larval instar were at 30oC, while it decline to its lowest titer at15oC.The study revealed that both sexes resulting from treated 4th larval instar withLC50 of Chlorfluazuron caused the formation of abnormal antennae and effect onnumber and distribution of the sensillae.

egyptian academic journal of biological sciences. a, entomology

Some factors affect the perception and production of pheromone and ultrastructure of antennae after treatment of Tribolium castaneum with Chlorfluazuron