Ladybugs/Ladybirds are the best and most effective way of getting rid of any pest that grow on cannabis plants.No matter how good a product says that it is on it's packageing it will never be has good has one that live and it's only funtion in life is to eat anything that will fit into it's mouth.In the summer months i collect has many has i can and just release them in the grow room even if there is no spidermites there will be dust mites these will keep lady birds happy just incase you do happen to get the dreaded spidermites.These little spotted friend of the gardener will live on the underside of the leaves causeing no problems to the plants at all.So if yo do have some around keep them around they will live happy in a grow room.
ladybugs wont totally iradicate pests, but if you have spider mites like i do they keep the pest population way down, so down that you should never see any webbing, you can get 1500 for less than $40 shipped and keep them in the fridge for 2 months, if you do have bug problems release a handful weekly, most escape but some stay around and mate and lay eggs, work better than any sprays