Onthophagus gazella:1A Non-target Arthropod for the Evaluation of Bovine Feces Containing Methoprene3

Abstract

In the laboratory, methoprene (Zoecon ZR-515) (isopropyl 11-methoxy-3,7,11- trimethyl-2,4-dodecadienoate) pre-mixed in bovine manure at 100, 10, 5, and 1 ppm inhibited hatch of eggs of the dung beetle ( Onthophagus gazella (F.), by 100, 56, 33.3, and 8.7%, respectively. Manure from a steer treated daily with methoprene at a rate of 1 mg/kg body weight inhibited egg hatch up to 32.6%. Surviving larvae, pupae, and adult beetles were normal, and no reduction was apparent in fecundity of surviving adult beetles due to exposure to methoprene while they were in developmental stages.