Hello, I am new to this forum. I have a problem with thrips and I have ordered Pyrethrum to fight off the infestation. I have also sprayed Neem oil. I am waiting for my spinosad spray which I ordered as well. I am currently feeding the plants with neem oil added to the water. However, my questions is since BT can be found in soil naturally, can it be added to water for feeding the soil to fight off the insects which burrow inside the soil? Any help is greatly appreciated!