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Trials of the rodenticide pyriminil against wild house mice (Mus musculus L.)
Abstract:
Pen field trials were conducted to assess the performance of the acute rodenticide pyriminil against the house mouse (Mus musculus L.). Four types of poison treatment were carried out using penned family groups of warfarin-resistant mice supplied with alternative plain foods. In each treatment pyriminil was included at 2% in a wholemeal flour/pinhead oatmeal/corn oil bait. Mortality was highest (46/54; 85.2%) when poison bait was offered for 4 days following 3 days of pre-baiting. The same pre-baiting and poisoning technique was adopted in five field trials carried out against mice infesting farm buildings. The efficacy of each poison treatment was estimated from the results of pre- and post-treatment census baitings; treatment success ranged between 53.7% and 96.7%, mean 80.5%. It is concluded that pyriminil treatments are best carried out after a period of pre-baiting and that when pyriminil is used in this manner it is about as effective as zinc phosphide for the control of mice.
Insights
Pyriminil, an acute rodenticide, effectively controls house mice (Mus musculus L.) when used with pre-baiting. This method achieved up to 85.2% mortality in penned trials and 80.5% in farm settings.
Area of Science:
- Pest Management
- Toxicology
- Rodent Control
Background:
- House mice (Mus musculus L.) are significant pests in agricultural settings.
- Warfarin-resistant mouse populations pose challenges for conventional rodenticides.
- Evaluating novel rodenticides like pyriminil is crucial for effective pest control.
Purpose of the Study:
- To assess the efficacy of the acute rodenticide pyriminil against house mice.
- To determine optimal application methods for pyriminil baiting.
- To compare pyriminil's effectiveness with existing rodent control agents.
Main Methods:
- Pen trials with warfarin-resistant mice using pyriminil baits (2% concentration).
- Four treatment variations were tested, including pre-baiting strategies.
- Field trials in farm buildings utilized pre- and post-treatment census baitings to estimate efficacy.
Main Results:
- Highest mortality (85.2%) achieved with a 4-day poison baiting period after 3 days of pre-baiting.
- Field trials demonstrated treatment success ranging from 53.7% to 96.7%, with a mean of 80.5%.
- Pyriminil efficacy in field trials was comparable to zinc phosphide when applied with pre-baiting.
Conclusions:
- Pre-baiting significantly enhances the effectiveness of pyriminil treatments.
- Pyriminil, when applied using a pre-baiting strategy, is a viable and effective rodenticide for house mouse control.
- The findings support pyriminil as an effective alternative for managing warfarin-resistant mouse populations.