what are the white spots on my african violet leaves?
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Powdery Mildew is caused by the Oidium fungus which thrives under conditions of high humidity and poor air circulation, especially after sudden changes in temperature. ... Powdery Mildew grows superficially on the leaves and flowers of African Violets, covering them with a light gray powder.
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White Spot White spot is a leafy vegetable disease caused by fungus Pseudocercosporella capsellae. The crop infected by the fungi usually has brown or gray spots on the leaves. ... The fungus can survive on seeds, so you can prevent it by planting certified seed.
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Entomosporium leaf spot is a common problem for photinia, and it's recognizable by small red spots on both sides of the leaves. Older plants might have larger, dark red, brown or gray spots with rings around the edges. As the disease progresses, the leaves fall off, and the plant can eventually die.
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Few pests or diseases cause white spots on fig trees (Ficus carica). Fig trees grow in the warm climates of U.S. Department of Agriculture plant hardiness zones 8 through 10 and can be invasive in some areas. Mosaic virus and scale insects can cause pale yellow, almost white spots to form on leaves.
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Note: White spots on leaves should be distinguished from the white or light gray powder caused by Powdery Mildew. The white spots, which are symptomatic of the causes listed, appear as part of the leaf tissue. The white or light gray powder caused by Powdery Mildew is a fungus which covers the leaves superficially.
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Temperature: Keep African violets warm. They like temperatures between 65°F to just under 80°F. Cooler temperatures will cause water soaked leaves that soon wither and die. Hotter temperatures will result in slower growth and reduced flowering.
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Too little light can cause of African violets not to bloom well. They prefer bright, indirect sun. Too little sunlight causes them to stretch for the light and produce few or no flowers; too much sun can burn the leaves. An east-facing window is ideal, especially with a sheer curtain to block the sun's harshest rays.
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Powdery mildew is a common, but minor fungal infection of magnolias that creates white spots of the foliage. ... The disease starts out as small white spots on leaf surfaces that enlarge as the disease progresses, creating a powdery white coating over the entire surface of the infected foliage.
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The genetic factors involved in creating a variegated African violet have instability issues. This instability can cause the leaves to vary in color. ... Keep in mind slight changes in temperature and water can also effect the leave color. If your plant looks healthy and seems to be thriving I would not worry.
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White Spots on Palm Leaves. ... White spots on palm leaves are usually indicative of a scale infestation. These tiny insect pests attach themselves to the leaves and stems of palms and other plants, sucking the sap and damaging or killing the plant. Sago palm scale (Aulacaspis yasumatsui) is the most deadly.
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My Crape Myrtle trees have white spots on the trunk and branches. ... This is an infestation of Crape Myrtle Bark Scale. One of the first signs of this insect is black sooty mold on the bark. Bark and leaves may feel sticky to the touch as a byproduct of where the scale is feeding.
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Identification. White spots on the shamrock plant are typically caused by two diseases. Powdery mildew is a fungal disease that causes white fungal patches to develop on the affected plant. Another disease that causes white spots is rust, which is also a fungal disease.
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Though African violets are not known to be toxic, it is generally never a good idea to let a child chow down on any houseplant, as individuals may have varying sensitivities to the plant's sap or hairy leaves. ... Many fuzz-covered plants are skin irritants, but African violet isn't reported to cause rashes or other harm.
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The powdery mildew fungus causes a white to light gray, powdery growth to form on the surfaces of rubber plant leaves or shoots. The mildew typically starts out as small spots or patches that enlarge until they cover the entire surface area.
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If you notice white lines inside your tomatoes or white spots on tomato leaves, this is probably indicative of insect feeding (likely leaf-footed bugs or stink bugs), which is one of the most common problems found in home gardens.
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The white spots on basil leaves may be the sign of powdery mildew. If the white spots are fuzzy, then it is powdery mildew. Powdery mildew can be the cause of fungus that develops in hot and humid or cold weather.
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Caused by the Sphaerotheca fuliginea and the Erysiphe cichoracearum fungi, powdery mildew appears as white, powdery spots on the leaves. In shady growing conditions, the small spots often enlarge and merge until the white substance covers entire leaves, stems and stalks.