Effects of Feeding TH-6040 to Two Breeds of Chickens2

The Influence of Diflubenzuron on Several Weight Characteristics in Growing Male Broiler and Layer Chickens

“…benzuron through their normal feeding habits. Miller et al (1976) observed no significant effects on body weight gain, egg production, fertility, or hatchability when two breeds of laying hens were fed 10 ppm diflubenzuron for 15 weeks. Crookshank et al (1978) showed that feeding diflubenzuron for 98 days at levels up to 250 ppm did not affect the hyaluronic acid content of combs of male broiler or layer chickens.…”

Benzoylphenyl ureas as veterinary antiparasitics. An overview and outlook with emphasis on efficacy, usage and resistance

“…As in the previous study, manure was periodically collected for bioassays with housefly larvae or for residue determination. Emergence of adult houseflies in manure of treated hens was reduced by >95% [210]. In a later study in Brazil, hens received medicated feed containing diflubenzuron (2 g of diflubenzuron 25% per kg feed) for two weeks.…”

“…Residues in body fat were very low, 0.007 mg/kg (WL) to 0.043 mg/kg (RIR) [223, 225]. In an already mentioned study [210] where hens received medicated feed containing 10 ppm diflubenzuron for 15 weeks, residues in eggs reached 0.38–0.55 ppm.…”

In vivo and liver microsomal metabolism of diflubenzuron by two breeds of chickens

“…Diflubenzuron has been registered as Dimilin for use against the gypsy moth and conditionally registered to control the boll weevil. It has been demonstrated that diflubenzuron will control fly larvae breeding in the manure of chickens and cattle when added to their diet (Miller, 1974;Miller et al, 1975Miller et al, ,1976; Wright, 1974Wright, , 1975Wright and Spates, 1976). In the course of these "feed-through" investigations Miller et al (1975), pointed out a 2-fold higher diflubenzuron egg residue level in White Leghorn (egg production type) chickens than in Department of Entomology, University of Maryland, College Park, Maryland 20742 (J.C.O.…”