This is unknown to many plant growers, but it is worth knowing. YES, sevin dust can be used to get rid of spider mites on your plant fields. The thing with spider mites is that they thrive very well in hot climates and they can multiply quickly. So, if you are negligent about it, they can decimate your plant fields in no time at all. Carbaryl, also known as Sevin dust is very effective in combating spider mites in your plant leaves. But note, you should only apply Sevin dust when you notice yellow colouration of your plant leaves. To apply the sevin dust effectively, follow these four steps.