As the fungus develops, those black spots on leaves are ringed with yellow. They are more concentrated towards the 'top' of the plant. If you could turn the leaf over, look for slight bumps. after reading your post, i took a leaf to a local nursery (some of my leaves now have tiny black spots) and ofcourse they sold me sprays that covers aphids, whiteflies and mites. Use a razor blade and carefully cut the bump to shave leaf and see if you can find insect. There are many varieties of lace bug worldwide, which may leave black excrement spots on the underside of leaves. If left untreated, black spot spreads rapidly and weakens plants severely. As a soil-borne fungus, it's present at all times, even deep winter. Azaleas planted in the sun often suffer the greatest damage from the azalea lace wing. Please send pictures of the undersides of the leaves. Do an image search with Google to see if it looks similar. The most common bugs on the undersides of leaves and fit the description of small black bugs are aphids and spider mites. Treating Black Leaf Spot Fungus Getting rid of black leaf spot must be a two-pronged attack. Soon the entire leaf turns yellow and falls. You may even see spots on the maple seeds – unless you were smart enough to plant a seedless maple without helicopter seeds. The lace bugs are small and … During the early spring months the adult azalea whitefly lays its eggs on the underside of the shrub's leaves. Do those black spots on maple leaves hurt the tree? The leaves appear mottled and loose color and texture. Black spots are one of the trouble signs. It starts with tiny black spots on leaves, no bigger than a pinhead. There are these little black things on my cucumber plants that have started appearing recently. The first step in treating the dark spots on your orchid's leaves is diagnosing the problem. Soon the entire leaf turns yellow and falls. Aphids are indeed bugs -- they are tiny insects that, along with black, also come in shades of yellow, green, brown and pink. Getting rid of black leaf spot must be a two-pronged attack. The insect is called a Lace bug, which is found under the leaves. As the fungus develops, those black spots on leaves are ringed with yellow. It starts with tiny black spots on leaves, no bigger than a pinhead. Lace bugs are very small and quite attractive. However, leaf spotting can also signify a bacterial or fungal disease. To be more specific, these are around 1/16 to 1/8 inches (1.6 to 3.2 millimeters), with a dark brown margin and lighter gray or tan centers. The spots may grow larger as the disease progresses. I trim the branches as much as possible (which always results in getting bitten by 100 thrips), but the leaves fall on my side everyday. Treating Black Leaf Spot Fungus. Around August, those tiny spots become significantly wider and thicker. You might even see the spots merging together. Tiny black spots on the underside of leaves appear. Black spot leaf disease shows itself first with black spots appearing on the leaf, then with rings of yellow as the spots grow, until the leaf turns entirely yellow and then falls off. They are small in diameter. They don't seem to be eating away the leaves or anything like that at the moment but they don't look benign. Aphids are more commonly seen outdoors, while spider mites are more common on houseplants. Some phalaenopsis have naturally mottled leaves, so it may be natural coloration. The underside of the leaves sport black spots from the insects' abundant fecal matter. Some leaf miners actually live IN the leaf. It will literally look like clumps of tar are stuck to the leaves. OK, I’m the only one who thinks they are attractive. i appreciate your many responses gringojay. A: The black specks are evidence of an insect that was active last spring and summer and is now gone, but I suspect he will return.