Preventing a rodent invasion

Monday, October 12, 2020

It isn’t a pleasant thing to think about, but as the farmers finish up harvest and the temperatures continue to drop, the number of mice seeking refuge into houses is going to increase.

Mice are brown rodents with large ears and small eyes that weigh about half an ounce. Their tail is generally three to four inches long.

The first signs individuals notice when a mouse is present are droppings, fresh gnawing and tracks. If we see a mouse in the house, it is generally trying to hide behind objects. However, mice are typically more active at night. Another sign you might be on the lookout for is small nests made out of shredded paper or other fibrous material.

If you think you might have a mouse in your house, it is a good idea to make sure all your cereal grains are sealed in plastic containers that mice won’t try to get into. Be aware that mice do eat other food besides cereal grains, but they prefer it over other items.

It is important to realize that mice are excellent climbers and can run up any rough vertical surface. Additionally, they can run on wire cables and have the ability to jump up 12 inches from the floor onto a flat surface. They can enter any opening that is slightly larger than one-fourth of an inch in width. Thus, if you think you have a mouse, it is really important that you check your house thoroughly to try to find out what it has touched, since mice are known to spread disease.

There are three parts of an effective mice control plan. They are good sanitation, prevention and population reduction. In terms of good sanitation, it is important to eliminate any places mice can find shelter. If you reduce the number of places mice can find shelter, you will prevent the mice from building a nest and raising young.

Prevention measures include sealing any openings larger than one-fourth of an inch. This would include tightly sealing any cracks and openings in building foundations and openings for water pipes, vents, etc. When sealing areas, do not use plastic sheeting, screen, wood, rubber or any other material the mice might be able to gnaw on.

Population reduction can occur by trapping or using a rodenticide. Trapping is a time-consuming, effective way to control the mouse population. Using a simple, inexpensive wood-based snap is effective and can be purchased in most stores. They can be baited with peanut butter, chocolate, dried fruit or bacon. Whatever you decide to use, make sure it is securely attached to the trigger.

If you do not want to use a wood-based snap, you can use glue boards. However, if you use a glue board, realize that children and pets can get attached to them. Therefore, you should not place them where they can come in contact with the glue board. Additionally, the glue board will lose effectiveness if they get covered with dust or are located in extreme heat.

There are several rodenticide baits available on the market to be used. Single-dose rodenticides can quickly reduce mouse populations; however, they are not as safe to use as multiple-dose rodenticides. If you would decide to use a rodenticide, always read and follow label instructions and make sure they are kept out of reach of children and pets.

Visit www.extension.purdue.edu/putnam or contact the local Purdue Extension office by calling 653-8411 for more information regarding this week’s column topic or to RSVP for upcoming events.

Upcoming Events:

Oct. 12 – Empower Me to be Clutter-Free, 11:30 a.m.-12:30 p.m.; register at: https://tinyurl.com/clutterfreewebinar

Oct. 20 – Morning Ag Mixer, 9 a.m.; join at: http://bit.ly/MorningAgMixer

Nov. 1 – Putnam 4-H Volunteer Recognition and Member Awards Program, 2 p.m., Putnam County Fairgrounds

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