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Cluster Fly
Cluster Flies ( Pollenia rudis ) Sometimes called "attic flies", usually appear in late fall or early winter and again on warm, sunny days in early spring. They buzz around the home and gather in groups at windows. The cluster fly is a little larger than the common housefly and moves more slowly. It can be recognized by the short, golden colored hairs on its thorax, the part of the insect that the wings are attached to. The larvae, or maggots of cluster flies develop as parasites in the bodies of earthworms. The adult flies emerge in late summer and early autumn and seek protected places to spend the winter.
Beneficial Nematodes
Beneficial Nematodes are parasitic on fly and fungus gnat larvae. Beneficial nematodes do not harm worms, birds, plants or the environment. They can be bought at most garden centers or on the web. Beneficial nematodes are microscopic and live below the soil surface. When they come in contact with a pest they attack and release a bacteria that kills the host within 48 hours.
Beneficial Nematodes are some of the most useful pest controls to come along in years, because if an insect spends part of its life cycle in the soil (lots of them do), predator nematodes want to kill them - it's as simple as that. Looking like microscopic "worms", predator nematodes attack and kill more than 250 different insects, including fleas, thrips, fungus gnats, even ones as large as cutworms. After invading the insect body (through mouth or anal openings), they go on to reproduce on the remains, migrating back to the soil when nothing but a shell is left. Predator nematodes attack only insects, too - never plants, earthworms, or other soil creatures, and they're unrelated to pest nematodes. But if it's an insect spending time in the soil, they zoom in for the kill.
Beneficial nematodes are so small and economical that they're sold by the package of one million, which treats up to 3000 square feet of growing area (24 million per acre). Nematodes come packaged on a small piece of "sponge" that's rinsed out in water, then watered into the soil using a watering can, sprayed on with a garden sprayer (no, the pressure doesn't hurt them - they go through the nozzles fine), fertilizer-injector or siphon feeder - it doesn't matter. Nematodes live and reproduce in any moist soil media, including rockwool, as long as they find insects to feed on. Although predator nematodes live for a few months, for best results make repeat applications every 4-6 weeks throughout the period when your target pest(s) are present to keep a high concentration in the soil. (Every 2 weeks for rockwool and other artificial soil media.) Nematodes will store dormant in the refrigerator 2-3 months before use, so it's easy to keep some on hand. Soil temperatures below the low 50's bring on dormancy, too, so a soil thermometer is useful for timing applications.
Find them at:
http://www.biconet.com/flies/nematodes.html
http://www.buglogical.com/nematodes.shtml
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