How to use Bacillus thuringiensis (Bt) to Control Insect Pests
Jul 07, 2020·First, make sure you have the right strain for the pest you want to control! You should also make sure that the insect will be in its larval stage when you apply the Bt. You will have better control if the larvae are small. There will be less damage to the plants because the little insects won’t eat as much.