What Are the Small Black Dots on Leaves of My Petunias?

Thrips are tiny, slender insects that feed on plant sap. They are usually black or brown, and they can be found on the undersides of leaves. Thrips can cause leaves to turn yellow and drop off.

Aphids

Aphids are small, soft-bodied insects that feed on plant sap. They are often green, but they can also be black, brown, or red. Aphids can cause leaves to curl and turn yellow.

Spider Mites

Spider mites are tiny, eight-legged pests that feed on plant sap. They are difficult to see with the naked eye, but they can be found on the undersides of leaves. Spider mites can cause leaves to turn yellow and drop off.

Whiteflies

Whiteflies are small, white insects that feed on plant sap. They are often found on the undersides of leaves. Whiteflies can cause leaves to turn yellow and drop off.

Scale

Scale are small, immobile insects that feed on plant sap. They are often brown or black, and they can be found on the stems and leaves of plants. Scale can cause leaves to turn yellow and drop off.