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Yellowjackets—particularly the western yellowjacket (Vespula pensylvanica) and related Vespula species—are the stinging insects most likely to turn noticeably aggressive in late summer, driven by large worker populations and a seasonal shift from protein hunting to scavenging for sugary foods. As colonies reach peak size and queens stop producing more workers, workers broaden their foraging behavior…

Wasps often build their nests under eaves because the overhang provides a dry, sheltered attachment point with stable temperatures and easy access to nearby food and water sources. The solid surfaces of fascia boards and rafters give social wasps reliable support for constructing paper-like combs, while the protection from rain and wind in these recessed…

To locate a hidden wasp nest, follow wasp flight paths to concentrated entry and exit points and inspect common nesting sites such as wall voids, eaves, attics, hollow trees, dense shrubs, under porches, and underground cavities. Wasp activity is often easiest to spot from a distance—watch for repeated flights to the same spot, workers carrying…

Bald-faced hornet colonies become noticeably more aggressive in late summer because the nests are at their largest, worker populations peak, and the colony shifts into a reproductive phase that requires intense protection of developing queens, males and stored food. At this stage individual workers spend more time guarding and foraging to feed a substantial brood…

You can tell a bald-faced hornet from a yellow jacket by appearance and nest location: the bald-faced hornet (Dolichovespula maculata) is a larger, mostly black wasp with distinctive white facial and abdominal markings that builds gray, paper-like spherical nests in trees, shrubs, or under eaves, whereas yellow jackets (Vespula species) are smaller, brightly banded yellow-and-black…

Perimeter treatments can substantially reduce the number of ticks that cross into a yard by creating a treated buffer along property edges and vegetation where ticks quest, but they do not form an impenetrable barrier that stops all ticks from reaching outdoor areas. These treatments typically use acaricides or insect growth regulators applied to leaf…

Most ticks in Pacific Northwest yards are concentrated very near the edge of natural vegetation — typically within 1–5 meters (about 3–15 feet) of forest, shrub lines, or unmowed tall grass — and their numbers fall off sharply toward the center of a regularly maintained lawn. Individual ticks can still appear farther in when favorable…

The safest tick sprays to use near edible plants are those explicitly labeled for use on food crops—most commonly insecticidal soaps, horticultural oils, and select botanical (EPA “minimum risk” 25(b)) products—applied as targeted spot treatments and only according to the product label. These options generally have low mammalian toxicity, short environmental persistence, and limited residual…

Tick granules are broadcast-applied pesticide particles that reduce questing ticks by killing them where they live in soil, leaf litter, and turf, while tick tubes deposit insecticide-treated nesting material that rodents carry into their burrows to kill ticks feeding on those host animals. Granules typically rely on residual contact activity across treated surfaces and produce…

Yard tick treatments can be safe for children who play outside when the products selected are applied according to label directions, appropriate re-entry intervals are observed, and application methods minimize direct contact with treated surfaces. Safety outcomes depend on the active ingredient and formulation, the concentration used, whether a licensed applicator follows established protocols, and…