Related Experiment Videos
Control of the northern fowl mite on inanimate objects by fumigation: laboratory studies
Abstract:
Laboratory studies were conducted to determine the efficacies of phosphine, methyl bromide, and sulfur dioxide as fumigants for the northern fowl mite, Ornithonyssus sylviarum (Canestrini and Fanzago), on inanimate objects. We were able to demonstrate that either methyl bromide or sulfur dioxide could kill all physiological forms of mites within 24 hr, which would be desirable for field use. Prosphine gas, released from Phostoxin pellets, had an LD95 of 18 hr for motile forms of the mites; however, it took 30 hr to kill the mite eggs. Therefore, it would be an unsuitable fumigant for practical field usage.
Insights
Methyl bromide and sulfur dioxide effectively control northern fowl mites on inanimate objects within 24 hours. Phosphine gas is less effective, requiring longer exposure to kill mite eggs, making it unsuitable for field use.
Area of Science:
- Veterinary Entomology
- Pest Management
Background:
- The northern fowl mite (Ornithonyssus sylviarum) is a significant ectoparasite affecting poultry health.
- Effective fumigation methods are crucial for controlling mite populations on inanimate objects in agricultural settings.
Purpose of the Study:
- To evaluate the efficacy of phosphine, methyl bromide, and sulfur dioxide as fumigants against the northern fowl mite.
- To determine the suitability of these fumigants for practical field application in poultry environments.
Main Methods:
- Laboratory fumigation assays were performed on inanimate objects infested with various life stages of Ornithonyssus sylviarum.
- Exposure times and mortality rates were recorded for phosphine, methyl bromide, and sulfur dioxide treatments.
Main Results:
- Methyl bromide and sulfur dioxide demonstrated high efficacy, eliminating all mite life stages within 24 hours.
- Phosphine gas (from Phostoxin pellets) achieved 95% mortality of motile mites in 18 hours but required 30 hours to kill mite eggs.
Conclusions:
- Methyl bromide and sulfur dioxide are effective fumigants for controlling northern fowl mites on inanimate objects, suitable for rapid field deployment.
- Phosphine is less suitable for practical field use due to its extended efficacy requirement for mite egg mortality.