I wouldn't use that crap on my cannabis. Why bother growing organic if you're just going to spray toxic poison on your plant?
Sevin is Carbaryl and it's some nasty stuff. It kills everything including Honey Bees. They were making that crap in Bhopal India when the equipment malfunctioned and released a cloud of toxic gas that killed thousands of people. I wouldn't even have that crap on my property.
Spray a solution of neem or sesame oil.