Feeding BAY Vi 7533 to hens

Area of Science:

• Veterinary Entomology
• Poultry Science
• Pesticide Toxicology

Background:

• House flies (Musca domestica L.) are significant pests in poultry operations, impacting bird health and productivity.
• Insecticides are used in poultry farming to manage fly populations, but their effects on birds and egg quality require evaluation.

Purpose of the Study:

• To evaluate the efficacy of BAY Vi7533 against house fly larvae in poultry manure.
• To assess the impact of BAY Vi7533 on the reproductive performance of White Leghorn and Vedette Mini-broiler breeder hens.
• To determine the presence and effects of BAY Vi7533 residues in eggs.

Main Methods:

• BAY Vi7533 was administered to breeder hens at concentrations of 0 to 25 ppm in their feed.
• House fly larvae were introduced into the hens' droppings to assess mortality rates.
• Egg production, fertility, and hatchability were monitored.
• Residue analysis was performed on eggs collected from treated hens.

Main Results:

• Concentrations of 15 and 25 ppm of BAY Vi7533 resulted in over 95% mortality of house fly larvae in droppings.
• A 25 ppm concentration reduced egg production in White Leghorn hens but not in Vedette Mini-broiler hens.
• Residues of BAY Vi7533 were detected in eggs from hens fed 5 ppm or higher (except for Vedette Mini-broilers at 5 ppm).
• Detected egg residues did not adversely affect fertility or hatchability.

Conclusions:

• BAY Vi7533 demonstrates high efficacy in controlling house fly larvae in poultry manure at tested concentrations.
• While residues can transfer to eggs, BAY Vi7533 does not appear to compromise the reproductive capabilities of breeder hens.
• Vedette Mini-broiler hens exhibited greater tolerance to the effects of BAY Vi7533 on egg production compared to White Leghorns.