what are the little white spots on my tomato leaves?
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Of the two kinds of powdery mildew which can affect tomato plants, Oidium lycopersicum shows as white spots on the upper surface of leaves. Other telltale signs that your tomato problems are caused by powdery mildew are white spots on the stems.
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Powdery mildew, caused by fungi in the genus Oidium, is responsible for the development of yellow and brown spots on leaves and bracts. Infected leaves produce white spore patches abundantly. Poinsettias are generally able to withstand a powdery mildew infection but it dramatically affects the plant's appearance.
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Black spots on tomato leaves can be caused by early blight, late blight, bacterial speck, and sooty mold, among other things. Black spots on tomato stems can be caused by bacterial wilt, alternaria stem canker, or tomato pith necrosis.
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One reason for parsley with leaf spots may be powdery mildew, a fungal disease fostered by low soil moisture along with high humidity. This disease starts on young leaves as blister-like lesions followed by curling leaves. The infected leaves then become covered with white to gray powdery mildew.
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Bacterial Canker What it looks like: Often confused with cloudy spot disease, bacterial cankers start as yellow dots on ripening red tomatoes. If you look carefully at the spots — using a magnifying glass if you have one — you'll see a dark, birds-eye-type rim around each of the yellowed spots.
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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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Powdery mildew is a fungal disease. ... Signs of the disease first appear as small, white spots that quickly grow and merge. Entire leaves may be covered with the thin, white layer of fungus, which may be mistaken for dust. Unlike dust, however, simply wiping off the substance is not enough to help an affected plant.
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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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If you're unlucky enough to find a silver or white leaf color on your tomato plants, it is undoubtedly the result of either sun damage, cold vulnerability or some sort of disease (most likely fungal). ... Mature tomato plants suffering from sunscald will include blistered or papery fruits.
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Powdery mildew usually starts off as circular, powdery white spots, which can appear on leaves, stems, and sometimes fruit. Powdery mildew usually covers the upper part of the leaves, but may grow on the undersides as well. Young foliage is most susceptible to damage. Leaves turn yellow and dry out.
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The actual cause of the white spots on jade leaves might be powdery mildew, or even a condition where the plant stores salts and “sweats” the excess out through its leaves. One cause has a quick fix and the other requires some cultural adjustment and treatment.
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Powdery mildew on houseplants is a fungal disease. Initially, it produces circular powdery white spots on the foliage of plants. As the disease spreads, the entire plant material can be affected with the fluffy white fungus.
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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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Powdery mildew on houseplants is a fungal disease. Initially, it produces circular powdery white spots on the foliage of plants. As the disease spreads, the entire plant material can be affected with the fluffy white fungus. Over time parts of the plant will succumb to the disease and die.
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The white spots on the squash leaves are almost certainly powdery mildew. Powdery mildew is a fungus and squash plants are very susceptible to infection.
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Watering Problems Too much or too little water can cause yellow tomato leaves. Soak tomatoes thoroughly once every five to seven days, depending on weather and soil type. ... Water tomato plants carefully at the base of the plant and keep the leaves as dry as possible.
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The most likely cause of pale green leaves in young tomato plants is low nitrogen. If the seedlings are planted in a nutrient-rich soil, this shouldn't be a problem, but if you are seeing light green leaves on your young tomato plants, you may need to add a balanced fertilizer to the soil.