Worm tea is "brewed" by placing a portion of vermicompost (worm castings) in a bucket of water, and aerating it. The tea should be used as soon as possible from when the aeration is stopped.
http://forums.gardenweb.com/forums/load/verm/msg1220485313727.html
Directions for making worm tea:
Fill 5 gal bucket with soft water.
Fill mesh or cloth bag with worm compost.
Tie bag with string & place in the bucket.
Turn on the aquarium bubbler placed in the bucket.
Make sure the bubbler & bag is underwater, & the water is bubbling vigourously.
Cover & "brew" for 24 hours
To boost organisms, add 1 Tablespoon of molasses after 12-16 hours from the start of brewing
After 24 hours ...remove the bubbler & bag...
You've made worm tea!
To use...Dilute with water 2:1 & use it immediately or as soon as you can
Don't store worm tea with the lid on or it may blow the lid off.
Worm tea is used as a fertilizer & sprayed on leaves of plants or poured on the soil.
http://www.wormmainea.com/Compost_tea.pdf
Advantages:
Provides many nutrients, minerals, beneficial microbes and bacteria essential for healthy soil.
Inoculates soil against fungi that causes black spot
Worm tea is richer in nitrogen, phosphate, calcium, magnesium and potash then the upper 6 inches of top soil.
Increases plant size and yield.
It's a natural repellent for aphids, spider mites, scale and white flies.
Worm tea can be used for seed germination:
The organisms in worm tea produce hormones, vitamins, nutrients, enzymes, amino acids and minerals needed by seedling cuttings and young plants
It's a low -cost fertilizer
Reduces the cost of gardening in the long run because the long-depleted soil is gradually restored naturally and plants grown in this soil begin to develop their own defenses against pests and diseases.
Uses everyday materials, so it's easy & economical to make
Because you make it yourself, you know what what's in the tea...no surprises
It's an alternative to using chemical fertilizers, so it can be used in organic farming.
Disadvantages:
Has to be used relatively quickly.
The longer the tea remains unaerated, the greater loss of microorganisms and of diversity. The loss in numbers and diversity could be as much as 30% - 50%, but it is still useful until it goes anaerobic.*
The tea will begin to have a strong odor when it has gone anaerobic
Good luck! Hope this helps.