Where are deer mice found in california
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Deer mice Peromyscus spp. Drip line chewing damage by deer mice. Photos: Kat Jarvis-Shean. The mice were taking advantage of cracks in the shrink-swell soil to more easily create their burrows Figure 4. As more orchards come into bear on these shrink-swell soils, especially orchards with drip irrigation, which can exacerbate the cracking in the orchard middles, I would not be surprised if we see more of this pest.
Deer mice share some similarities with voles Microtus californicus , which can make them tricky to diagnose as the source of problems. Once diagnosed, management can be complicated because rodenticide use for deer mice can be limited in seasonality. Figure 4. Burrow that took advantage of existing soil cracking. Photo: Kat Jarvis-Shean. Deer mice are similar in size to meadow voles, and have similar sized burrow openings around 1. However, there are numerous differences in the biology and habits of deer mice and voles that can help diagnose which rodent is causing damage in your orchard Table 1.
Both may cause chewing damage on irrigation lines. Otherwise, deer mice damage is largely focused on nuts, whereas vole damage is most concerning on young tree trunk bark. Deer mice populations, when problematic, build up within an orchard over time, whereas many voles may migrate into an orchard at once. Vole populations generally grow much faster than those of deer mice because they have more young per litter, more litters per year and female voles can reproduce at an earlier age than female deer mice.
Table 1. Differences between Deer Mice and Voles. Figure 5. Deer mouse burrow. Depending on whether the crop is bearing or non-bearing and the time of year, first generation anticoagulants chlorophacinone and diphacinone and the acute toxicant zinc phosphide may be available to manage deer mice populations.
Certain broadcast products can be used after harvest and during the dormant season, whereas rodenticides can only be used through elevated bait stations during the growing season in bearing orchards. Follow all label directions. Deer mice have a small range of 0. To assess treatment efficacy, Dr. Baldwin suggested using non-toxic wax monitor blocks, blocks evenly spaced throughout the orchard.
Leaving these blocks for two days and then counting feeding damage on the blocks before and after rodenticide use will help gauge how efficacious the treatment was. Deer mice can spread the virus that causes Hantavirus Pulmonary Syndrome, a potentially fatal disease to humans. The virus is transmitted when aerosolized saliva, feces or urine of infect deer mice is inhaled. Thus take care when maintaining bait stations to open them while standing upwind of the station.
Your email address will not be published. Skip to content. Posted on May 17 by Katherine Jarvis-Shean. Figure 3. Chewing damage to nuts in trees. Leave a Reply Cancel reply Your email address will not be published.
Island Deer Mouse – Channel Islands National Park (U.S. National Park Service) – 2. House Mouse
The deer mouse is commonly found in forests, brush, grasslands, and chaparral areas throughout California. State and local health agencies have tested. Because this particular species prefers outdoor areas, be sure to check basements, attics, outbuildings, and rarely used cars/RVs for signs of a deer mice. LOS ANGELES – Seven deer mice found in Loma Linda, Yucaipa and Mentone were confirmed to carry the potentially fatal hantavirus, state officials said Thursday.
Where are deer mice found in california –
Deer Mice Peromyscus maniculatus.