wow, but what is worm tea? do u make it or buy it? i sometimes use a spray bottle filled with water & dawn dish soap. it doesnt kill them, but they dont like it either.
Do remember to clean out the blender after frothing up the worms.
Just kidding! I suppose the liquid dribbling from the worm composter contains many bacteria and even soil nematodes that might have the affect you mention. It makes a great foliar feed as well, suppling many trace elements.