“Doodle bug” is a common name that refers to two entirely different creatures: the antlion larva and the pill bug or sow bug. Since control methods differ drastically depending on the species, the first step in effective removal is accurate identification. The nuisance level also varies; antlions are rarely considered pests, while pill bugs and sow bugs often become problematic when they invade homes or damage garden plants. This article provides practical strategies for identifying and removing whichever creature you are facing.
What Kind of “Doodle Bug” Are You Dealing With?
You can identify your specific “doodle bug” based on its physical appearance and the environment it occupies. The antlion larva is a predatory insect known for constructing distinct, conical traps in dry, fine soil or sand. This larva is grub-like, with a bulky body and large, sickle-shaped mandibles used to capture prey that slides into the pit. These pits, typically one to two inches wide, are often found in sheltered areas like under building eaves or tree overhangs.
The other common “doodle bug” is the pill bug (roly-poly) or the closely related sow bug, which are not insects but terrestrial crustaceans. Both are grayish, oval, and segmented, possessing seven pairs of legs, but only the pill bug can roll completely into a tight ball when disturbed. These crustaceans require high moisture to survive, breathing through gills. They are predominantly found under rocks, mulch, decaying wood, or leaf litter. When they appear indoors, it almost always signals a significant moisture problem in the basement or ground-level areas.
Modifying the Environment to Deter Infestations
Since pill bugs and sow bugs are the more common household pests, controlling their population begins with eliminating the moisture and debris they need to survive. These crustaceans will perish within two days if they cannot access sufficient moisture, making environmental control the most effective long-term solution. Start by fixing all plumbing leaks, ensuring gutters are clean, and confirming that exterior drainage directs water away from the foundation of the structure.
Ventilation is another major factor, especially in enclosed spaces like crawl spaces and basements, where humidity tends to build. Installing dehumidifiers or ensuring existing vents are open and unobstructed will greatly reduce the high moisture levels that attract these pests. Clearing the perimeter of the home of organic debris removes their primary hiding spots and food sources. This includes raking up leaf litter, removing grass clippings, and storing firewood off the ground and away from the foundation.
The use of mulch should be managed carefully, as it provides a desirable damp, dark habitat. Pulling back mulch several inches from the foundation creates a dry, inhospitable barrier that these crustaceans are hesitant to cross. Watering plants in the morning allows the soil surface to dry out by evening, when pill bugs and sow bugs are most active. Shifting from sprinkler systems to drip or furrow irrigation can also help limit surface soil moisture around garden beds.
Targeted Removal and Physical Barriers
For the antlion larva, which rarely poses a problem, removal is straightforward and usually unnecessary, as they benefit the environment by preying on ants. If a pit is located in an undesirable area, simply disturbing the sandy spot with a stick or scooping out the larva with a small spoon will encourage it to relocate. Since antlions require loose, dry soil to build their traps, a light watering of the area will often make the habitat unusable, prompting the larva to move.
Targeted removal methods for pill bugs and sow bugs focus on trapping and localized application of physical desiccants. Simple traps can be made using cut potato halves or damp, rolled-up newspaper placed in areas where the pests congregate. The crustaceans are attracted to the dark, moist conditions and decaying matter, allowing for easy collection and disposal in a container of soapy water the following day. This method provides an immediate reduction in population without the use of chemical sprays.
A highly effective, non-toxic barrier is food-grade diatomaceous earth (DE). This fine powder causes pill bugs to dehydrate and die when they cross it by damaging their waxy outer layer. Apply DE as a thin layer to cracks, crevices, and entry points. Reapply after rain or watering since the powder becomes inert when wet.
Exclusion methods are also necessary to prevent indoor entry. This involves sealing gaps and cracks in the foundation, installing weather stripping on doors, and ensuring all ground-level entryways are properly protected.