I have several other strains that are not showing signs of severe cupping. I feed them a complete liquid fertilizer at 3ml to 1liter. I adjust my ph of my water but im using well water, I don't know the ppm. If this issue is being caused by insects, I should address it asap but dont want to start spraying this and that on it, for no reason. Im in Ontario Canada and its been super hot and humid all summer. If you have seen this or know what it might be, I would love your suggestions. Thanks!!