Are Mice or Voles Eating Your Stored Plant Bulbs?
It is always disappointing to discover damaged flower bulbs during winter storage, especially when they were in good condition during fall. Chewed and even vanished bulbs may indicate rodent damage, and a King City pest control expert can help identify the source when activity continues.
The house mouse can be a problem in enclosed storage rooms. In King City’s cold winter, they might find their way into garages, garden sheds, and basements through any openings. Such spaces might help them gain access to the stored plants.
Mice are capable of gnawing through cardboard boxes and other weak packaging material. Inside, they might consume the bulbs that are appropriate for them to eat.
Voile will also eat the plant bulbs, but their actions differ. They generally inhabit outdoor areas such as grassy fields, gardens, and vegetative areas surrounding buildings. Even in winter, they are active under the snow and use covered pathways to get to their food.
Voles can also access bulbs located close to the ground within a garden shed where there are entry points to vegetation outside. Nonetheless, voles tend to be much less frequent visitors to indoor storage rooms than the common mouse.
Not all ornamental bulbs will appeal to pests equally. While some such as tulips may be nibbled on, others might be unpalatable.
Dahlias tubers and Gladiolas corms stored indoors could also become victims of pest activity when the opportunity presents itself. The extent of this depends on a number of factors.
In case of multiple losses of bulbs within one storage box, look beyond just the missing bulbs to identify the underlying cause.
How Can You Tell Whether Mice or Voles Are Responsible?
Mice and voles are both small rodents, but their appearance and movement patterns offer useful clues.
| Feature | House mice | Voles |
|---|---|---|
| Body shape | Slender, relatively narrow | Stocky and rounded |
| Tail | Relatively long and thin | Shorter, often furry |
| Snout | Pointed | Blunt and rounded |
| Ears | More noticeable | Smaller, partly hidden by fur |
| Common location | Garages, basements, sheds, storage rooms | Gardens, grassy areas, ground-level shelter |
| Movement | Good climbers; explore shelves and boxes | Usually remain close to the ground |
Look for these additional signs:
- Droppings: Small, dark droppings near containers may indicate rodent activity, although their appearance alone may not identify the species.
- Chewed packaging: Holes in cardboard or torn bags can suggest mice have accessed stored bulbs.
- Nesting material: Shredded paper, insulation, or other soft materials may indicate rodents are using the storage area.
- Movement patterns: Activity on high shelves may suggest mice, while ground-level activity near vegetation may suggest voles.
- Outdoor runways: Narrow pathways through grass near a shed may provide supporting evidence of voles.
For instance, a King City resident can find gnawed dahlia tubers from a basement shelf. In case there are holes in cardboard boxes and droppings, mice could be blamed for that.
On the other hand, damaged bulbs found at the entrance to an unlocked shed, as well as runways through nearby grass, could indicate the presence of voles.
What Does Rodent Damage to Stored Flower Bulbs Look Like?
Damage by rodents is characterized by the absence of plant parts, gnawing damage, and partial consumption of the bulbs. New damage reveals the inner, softer part of the bulb under the protective outer layer.
Some bulbs have small pieces bitten off them, while some are completely eaten. Sometimes, homeowners find an empty box or scattered plant pieces in place of healthy bulbs.
Common signs include:
- Visible gnaw marks: Small cuts or rough, uneven edges along the bulb’s surface.
- Missing sections: Portions of the bulb, tuber, or corm have been eaten.
- Damaged outer coverings: Papery skins are torn or removed, exposing inner tissue.
- Scattered fragments: Pieces of planting material are found inside or around storage boxes.
- Chewed containers: Cardboard, paper, or lightweight packaging has visible holes.
- Rodent evidence: Droppings, shredded material, or other signs appear close to damaged bulbs.
Tulip bulbs
The bulbs of tulips are indeed true bulbs consisting of fleshy scales covered externally by a protective layer. Rats could eat up the outer layers of the scales or even damage the base of the bulb.
Even though tulips are supposed to be planted in gardens in fall season, the homeowner could store the unplanted bulbs inside the garage.
Dahlia tubers
The dahlias develop tuberous roots which act as reservoirs of nutrients for future growth. They are usually lifted during winter and stored since they do not withstand freezing conditions.
The mice can eat into the soft surface of the tubers to create uneven areas of missing tissue.
This kind of damage done to the crown or growth point is a serious matter.
Gladiolus corms
Gladiolus flowers do not have bulbs but rather produce corms. The latter are storage organs that are covered with layers of protection.
The pests might chew holes in them, remove portions of the organ, or cause damage to the coverings. But, insects and storage diseases can also be harmful to gladiolus corms.
Before making conclusions about the cause of the problem, homeowners need to check the surrounding corms.
How Can You Tell Rodent Gnawing From Bulb Rot or Insect Damage?
Not every damaged bulb has been eaten. Poor winter storage conditions can cause deterioration that resembles feeding damage.
The following differences can help identify the likely problem.
| Possible cause | Common signs |
|---|---|
| Rodent gnawing | Irregular missing sections, tooth marks, scattered fragments |
| Bulb rot | Soft tissue, dark discolouration, mould, unpleasant odour |
| Dehydration | Shrivelled surfaces, wrinkles, loss of firmness |
| Insect damage | Small holes, internal tunnels, insect remains or frass |
| Physical damage | Cracks, bruises, cuts, or breaks from handling |
There will be a clear indication that the bulb has been chewed on. It can be scraped, chewed, or have an uneven texture. Damages to containers, together with presence of droppings, help in confirming this.
Rot will cause changes in the health state of the tissues affected. The affected part will be soft, moldy, or discoloration without evident tooth marks.
For example, bulbs kept in too humid conditions can be affected by soft rot while in bulbs grown under excess dry conditions become wrinkly or shriveled.
The University of Saskatchewan recommends that during storing of dahlia tubers, they should be regularly checked both for drying and rotting.
Insect damages might be difficult to spot as sometimes there could be small holes, galleries, or droppings. More thorough inspection can lead to finding out larvae.
Take into account that two or more problems can happen to the same bulb at once. Rodent damages can expose the tissues which become infected later on with rots.
In case of discovering the damaged bulbs in your King City garage or storage space, inspect each separately before putting them back into storage.
Check whether the remaining tissue is firm and whether important growing points remain intact. Look for mould, extensive softening, or other signs of deterioration.
When Should You Contact a Rodent Control Professional in King City?
Occasional damage to a stored bulb does not always mean professional pest control is necessary. However, repeated feeding or other signs of rodents may indicate an ongoing problem.
Consider contacting pest control experts in King City when:
- Stored bulbs continue disappearing despite improved protection.
- Fresh mouse droppings repeatedly appear around storage containers.
- Rodents are seen entering garages, sheds, or basements.
- New gnaw marks appear on packaging or nearby building materials.
- Suspected entry points are difficult to locate or safely seal.
- Rodent contamination becomes extensive or difficult to manage.
Professional rodent inspection can help identify active entry points, assess rodent activity, and recommend suitable control measures.
Homeowners seeking mice removal in King City can contact Simcoe PestX for assistance with suspected rodent activity in garages, sheds, and other storage areas.
Addressing repeated rodent access while maintaining proper bulb storage conditions can help protect the remaining planting material through winter.
