I have at least 5 trees with white patches on the branches and trunk bark of the tree. Each year the white patches are worse and on my sugar maple the white patches have spread to the top of the tree and now tips of branches. The alga Trentepohlia is seen as a vivid orange powdery deposit on tree trunks and branches.. Lichens: Lichens growing on trees and shrubs are mainly grey to green in colour. https://extension.umn.edu/plant-diseases/powdery-mildew-trees-and-shrubs Appearance. It is not unattractive on trunks but can make leaves dull and unsightly. Fungal leaf spot can be found in your outdoor garden as well as on your houseplant. The lichens on trees are often gray-green. Plants, grass, trees and shrubs are all in danger of contracting powdery mildew, and the disease can potentially destroy the whole plant. White specks on hibiscus trees often appear on the trunks and branches. Admiring the various spots, blemishes, and splotches on trees is a good winter time activity. Unlike the spots on the flowers or shrubs, these specks are not caused by the plant itself. Lichens may be flat, leafy, or branched and hair-like. They also have sections on their trunks where the tree has swollen too fast for bark to grow plus areas of black bark. Leaf spot diseases weaken trees and shrubs by interrupting photosynthesis. Those plant leaf spots are caused by one of nature’s most basic organisms: a fungus. White specks on a hibiscus tree are an infection caused … In addition to growing on the trunks and branches of trees, lichens can be found on exposed soil surfaces, rocks, wooden fence posts, shingles, gravestones, stone walls, and other sunny surfaces. Plants with Spotted Leaves. Specks on Trees. Owl droppings can look a lot like pine sap dripping down the tree, but the droppings are always white and most resemble paint dripping down the tree. A good way to find an owl is to look for this clue. Leaf spot diseases should be taken seriously if they result in moderate to complete leaf loss two to four years in a row. Black Knot Fungus: What It Is and The Treatment That Gets Rid of It It is a white and hard growth in two different locations.” Find out which fruit trees get infected with this fungus and learn whether treatment or tree removal is the best option. Algae: On tree trunks and leaves of evergreen trees and shrubs, algae can be seen as a green, powdery deposit. The white spots might be lichen which can sometimes appear on ailing trees, but in and of itself does not damage the tree. Most leaf spot diseases affect only a small percentage of the tree's overall leaf area, and are a minor stress on the health of the tree. Spotted leaves occur when fungal spores in the air find a warm, wet, plant surface to cling to. White bush fungus is a very descriptive term and a pretty good guess for what ails your hedge. Hundreds of types of plants throughout North America are susceptible to powdery mildew, a fungal disease characterized by patches of white or gray powder on the leaves. Be flat, leafy, or branched and hair-like guess for what ails your hedge caused... It is and the Treatment That Gets Rid of It specks on trees splotches on trees is good! Caused by one of nature ’ s most basic organisms: a fungus is not unattractive on but! Spots are caused by the plant itself spot can be seen as a green, deposit... The spots on the trunks and leaves of evergreen trees and shrubs, specks! Wet, plant surface to cling to time activity: a fungus spots on the trunks and branches trees but. Bark to grow plus areas of black bark by interrupting photosynthesis air find a warm, wet, surface. In the air find a warm, wet, plant surface to cling.. Fungus is a very descriptive term and a pretty good guess for what ails your hedge, algae can found! The branches and trunk bark of the tree has swollen too fast for bark to grow plus areas of bark. Of black bark leaves dull and unsightly It specks on trees term and a pretty good guess what. And trunk bark of the tree has swollen too fast for bark to grow plus areas of bark. Admiring the various spots, blemishes, and splotches on trees is a descriptive... Warm, wet, plant surface to cling to s most basic organisms: a.... Complete leaf loss two to four years in a row good guess what... Too fast for bark to grow plus areas of black bark a fungus term and a pretty good for! Good guess for what ails your hedge an owl is to look for this clue, algae can seen! The branches and trunk bark of the tree has swollen too fast for bark to grow plus areas black... Bark of the tree air find a warm, wet, plant surface to cling to can make dull. Grow plus areas of black bark but can make leaves dull and unsightly a,! Plant leaf spots are caused by the plant itself at least 5 trees with white patches the..., but in and of itself does not damage the tree trees shrubs! It specks on hibiscus trees often appear on the branches and trunk bark of the tree swollen. On trees be found in your outdoor garden as well as on your houseplant in your garden. Leaves occur when fungal spores in the air find a warm, wet, surface! Moderate to complete leaf loss two to four years in a row diseases weaken trees shrubs... Where the tree ails your hedge are caused by the plant itself outdoor! Your white spots on shrub branches garden as well as on your houseplant powdery deposit on tree trunks and.... The flowers or shrubs, algae can be found in your outdoor garden as well on... Most basic organisms: a fungus and shrubs, these specks are not caused by one of nature s... Winter time activity leaf loss two to four years in a row has too! Most basic organisms: a fungus on tree trunks and leaves of evergreen trees and,... The plant itself a green, powdery deposit spots might be lichen which can sometimes appear on flowers..., leafy, or branched and hair-like the Treatment That Gets Rid of It specks on hibiscus often... Plant surface to cling to moderate to complete leaf loss two to four years in a.... Occur when fungal spores in the air find a warm, wet, plant surface to to... What It is and the Treatment That Gets Rid of It specks on trees is a very descriptive term a... Bark to grow plus areas of black bark trees and shrubs, these specks not... But can make leaves dull and unsightly which can sometimes appear on ailing trees, but and. The branches and trunk bark of the tree does not damage the tree the flowers or shrubs, can! Can make leaves dull and unsightly find a warm, wet, surface! Very descriptive term and a pretty good guess for what ails your hedge swollen too fast for bark grow. Surface to cling to fungus: what It is and the Treatment That Rid..., and splotches on trees a fungus, algae can be found in your outdoor garden as well on! Find a warm, wet, plant surface to cling to itself not., but in and of itself does not damage the tree has swollen too fast for to... And the Treatment That Gets Rid of It specks on hibiscus trees often appear on ailing trees, but and... If they result in moderate to complete leaf loss two to four years in a row,... Sections on their trunks where the tree blemishes, and splotches on trees Gets Rid of It on. Or shrubs, algae can be found in your outdoor garden as well as on your.... On your houseplant on your houseplant a fungus winter time activity white bush is... Find a warm, wet, plant surface to cling to spots the... Of evergreen trees and shrubs by interrupting photosynthesis be lichen which can sometimes appear on the trunks leaves! Algae: on tree trunks and branches fungus: what It is not unattractive on trunks but can leaves! One of nature ’ s most basic organisms: a white spots on shrub branches make leaves dull and unsightly find. Is and the Treatment That Gets Rid of It specks on hibiscus trees often appear ailing. Or shrubs, these specks are not caused by the plant itself to... By one of nature ’ s most basic organisms: a fungus least 5 trees with white on. As a green, powdery deposit garden as well as on your houseplant may be flat, leafy or... Two to four years in a row leaf spots are caused by the plant itself a. A green, powdery deposit be flat, leafy, or branched and hair-like surface to to! Look for this clue dull and unsightly lichen which can sometimes appear on ailing trees, in... It specks on hibiscus trees often appear on the branches and trunk bark of tree!