Dalotia coriaria - Rove Beetle
RoveBeetles10
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Dalotia coriaria (Greenhouse Rove Beetle) is the "heavy artillery" of biological control. Unlike predatory mites that are confined to the soil surface, Rove Beetles are aggressive, winged hunters that can fly throughout your grow space to locate pest hotspots. These generalist predators are voracious eaters, consuming 10–20 prey items per day. They are essential for larger indoor gardens, greenhouses, and large bioactive enclosures where you need a predator that can patrol the entire area—from the soil level up to the base of the stems.
Field Notes — Dalotia coriaria
| Species | Dalotia coriaria (formerly Atheta coriaria) |
| Common name | Rove beetle |
| Type | Predatory beetle — Staphylinidae |
| Ships as | Adults, sometimes with larvae, in a vermiculite or peat carrier |
| Sold by | Count |
| Size | 3–4mm. Dark brown-black, long and narrow, with short wing covers that leave the abdomen exposed. Curls its tail up when disturbed |
| Hunts | Fungus gnat larvae and pupae, shore fly larvae, thrips pupae in the soil |
| Eats opportunistically | Springtails, root aphids, small soil-dwelling larvae, mites, organic debris. Taken on encounter |
| Won't touch | Anything on foliage — aphids, thrips adults, spider mites, whitefly, mealybugs, scale |
| Where it works | Soil surface and top layer, and the greenhouse floor. Both adults and larvae are predatory and both hunt in the substrate |
| Target stage | Fungus gnat larvae and pupae. Also takes thrips pupae, which is the part most people miss |
| How it works | Actively hunts through the top layer of substrate and across the soil surface. Fast-moving and highly mobile — adults fly and will move between pots on their own |
| Optimal temp | 60–85°F (15–29°C) |
| Humidity | Moist substrate required. Won't work in dry media |
| Egg to adult | Roughly 3 weeks at 70°F |
| Adult lifespan | Several weeks; females lay continuously |
| Establishes | Yes, and readily. This is a colonizer — it builds a standing population in moist substrate and persists |
| Deploy | Immediately on arrival. Sprinkle carrier onto the soil surface, or make breeding stations in a few pots and let them spread |
| Release timing | Evening. Onto moist substrate |
| Refrigerate | No |
| Compatible with | Foliar predatory mites, beneficial nematodes, lacewings, ladybugs, Aphidius, Cryptolaemus, Diglyphus, Trichoderma T-22 |
| Keep separate from | Springtails — rove beetles prey on them. Also competes with and predates Stratiolaelaps scimitus to some degree, though the two are commonly run together in commercial programs |
| Chemical interval | One day after neem oil or insecticidal soap. Never with sulfur, at any dilution |
| Safe around | Pets, children, plants |
