You can't control blight with JS. The only way I know is to use JMS even before planting pepper seedlings. JMS is available year-round. By increasing the number of microorganisms in the soil, the microbial diversity increases and the soil becomes softer. Then, the pepper roots will be well established and it will be an environment in which blight cannot occur. We will provide you with a link to a related video. - https://youtu.be/ZIRvmA2Gkgs