In the future, you shouldn't hijack other people's threads like that, you should make a new thread if you have a different topic to discuss. It helps us stoner plant docs keep straight what the problem is that we're dealing with.
But for now, don't make another thread about it, you can buy yellow sticky card traps to get the adults. They are attracted to the color yellow and will get stuck to the card and die without using poisons. For the larvae, which are in the soil eating at your roots, you can make a mixture of 3% Hydrogen Peroxide and correctly pH'd water. Try using 1 part Hydrogen peroxide mixed with 3 parts pH'd water. Water the plant with this mixture and the HP should kill the larvae. You can also put a slice of peeled potato on the top of the soil, then come back later to check it. The potato attracts the larva up to it, where you can see them and pick them out.