These tiny, eight-legged pests of black, green, red, or yellow are nearly invisible. They destroy plants by sucking juices from the leaves, giving the leaves a stippled, bleached, or spotted appearance. Mites are most severe in hot, dry weather.

Commercial product: Insecticidal soap spray (such as Safer), or horticultural oil
Home remedy: Homemade soap spray (add ½ teaspoon mild dish soap and 1 teaspoon cooking oil to a 1-quart sprayer filled with water)

Gentle pest controls