Put some liquid oxygen into the soil that will kill anything in the soil, i was reading something about how it not only is good for oxygen into the roots but it also kills everything bad in the soil aswell' a got abit on my finger and it stung too fair play, made the bits of my hand that it touched turn white, dont know if it would work but give it a go' at the end of the day the only thing it will do if not kill them is put so oxygen into your soil lol'
If just started a new grow but i had little white worm looking things in my soil and when i looked it up on the net it said that they live under the soil and live off the roots, they came from gnat lavei' dont know if i spelt that right, anyways i found something called tabbco juice, it said to take 2 strong ciggerets and leave them soak in water for 24hrs then next day boil it for 3-4mins, put in a spray bottle and spray the leaves, hope this helps dude scunk