what causes yellow spots on my tomatoes?
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One of the common tomato maladies is Septoria leaf spot. It is a fungal disease that affects the leaves, but not the fruit. The first leaves that are affected are typically toward the bottom of the plant.
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Hi Jo, leaf curl on tomatoes can be a sign of a few things - too much water, too little water, irregular watering, too much nitrogen in the soil, or too much sun. Remove the worst affected leaves, and rather than watering a little and often give your plants a deep water once or twice a week instead.
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Other Causes of Pothos Leaves Turning Yellow When pothos leaves yellow, it can signal serious problems like the fungal diseases, pythium root rot and bacterial leaf spot. Root rots are often caused by soil-inhabiting fungi and overly moist soil; poor drainage and plant crowding favor their development.
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If it's just a few leaves at the bottom that are affected, the problem could be a lack of nitrogen or sunlight. Check how much light the plant receives and monitor your feeding schedule. More likely it is a water issue -- too much or too little. Too much water chokes tomato plant roots; too little stresses the plant.
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Fungal Spots White spots that rub off are usually caused by powdery mildew. Some zucchini varieties are more prone to this fungus than others are. The growth usually appears as a white or gray powdery growth on the upper leaf surfaces.
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Fungal infections are the most likely culprits if your tomato plants have lower leaves that are beginning to wilt and die. ... Possible fungal infections include Fusarium wilt, early blight, late blight or Septoria leaf spot. Although these each present with different symptoms, all tend to affect the lower leaves first.
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Early Blight (Alternaria) Another tomato plant disease fungus, Alternaria, causes early blight. Lower leaves show brown or black spots with dark edges, almost like a target. Stem ends of fruits may be attacked, showing large, sunken black areas with concentric rings. This fungus usually strikes after plants set fruit.
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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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One of the common tomato maladies is Septoria leaf spot. It is a fungal disease that affects the leaves, but not the fruit. The first leaves that are affected are typically toward the bottom of the plant. The leaves develop small, dark spots that rapidly enlarge to 0.25 inches and have a tan or gray center.
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Why are My Seedlings Turning Yellow? ... Just as too much or not enough light can cause yellowing seedling plants, too much or too little water or fertilizer could also be the problem. If the soil around your plants has been completely dried out between waterings, your seedlings are probably just thirsty.
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Other Causes Cold weather and too much moisture are among many potential causes for yellow leaves on a zucchini plant. Powdery mildew can also cause yellowing, typically on the plant's oldest leaves. ... Pests including the squash vine borer and squash bugs can make leaves yellow and wilt.
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The black spots is likely the result of honydew/sooty mold caused by what looks like aphids as Horntoad indicated. they are aphids. If you don't want to buy an insecticide for just a couple of plants, you can first try just wiping down the plants - both tops and bottoms of the leaves - with a wet paper towel.
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If the white or gray spots on your tomato leaves have dark edges, it may be Sequoia leaf spot rather than powdery mildew. Like powdery mildew, Sequoia leaf spot is a fungal disease that can eventually lead to the loss of affected 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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Just as too much or not enough light can cause yellowing seedling plants, too much or too little water or fertilizer could also be the problem. ... Overwatering, however, is a very common cause of sickly plants. Let the soil begin to dry a bit between waterings.
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What causes tomato plant leaves turning brown and curling? Septoria leaf spot, caused by a fungus (Septoria lycopersici), attacks tomatoes, eggplants, potato and several other plants related to tomatoes. The pathogen thrives when the weather is warm and humid with lots of moisture.
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One of the common tomato maladies is Septoria leaf spot. It is a fungal disease that affects the leaves, but not the fruit. The first leaves that are affected are typically toward the bottom of the plant. ... If there are enough spots, the leaves turn yellow, then brown.