That Kaolin clay is very interesting. It is one of the main ingredients in making china/ceramics, medicine, plastics, paper, and a bunch of other stuff. When I was a nurse we gave a prep to patients with loose stools and that product was just named Kaolin. I am thinking it may be similar to diatomaceous earth in some applications. When I had a problem with grasshoppers in my veggie garden I asked an expert at the university and came up with something that worked. Grasshoppers love canola oil. I mixed canola with a pesticide and sprayed the plants around my garden and not in the garden. The canola is the "bait" and the pesticide killed pretty quick = 90% reduction in damage to garden plants. Some grasshoppers won't eat your cannabis and others will chomp on it all day. Catch some of them so you can identify them as to species and thus know exactly what their diets are and then target them with the appropriate arsenal.