The damage can appear as 'white spots' on leaves, or a lacy or skeletal appearance on the leaves. Insecticidal Soap will kill thrips very effectively. Repeat about every three days to kill young thrips hatching from existing eggs on the plants. These are most common on indoor plants, and they can do serious damage. They are very hard to see with the naked eye.
Spider mites leave a yellow, stippled-effect on the leaves, like tiny yellow spots.
Spider mites may appear as tiny brown, green or red specks on leaves. They often leave a white webbing on the leaf surface. To confirm spider mite infestation, hold the leaf over a piece of white paper and sharply rap leaf. If you see small specks running around the paper, go directly to Control below. Reapply every 4 days, for about two weeks.