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The most common cause of bacterial leaf spots are by bacteria in the genera Pseudomonas and Xanthomonas. For example, Pseudomonas syringae pv. tabaci is known to cause angular leaf spots of cucumber, Pseudomonas syringae pv. phaseolicola to cause bean leaf spot and Xanthomonas campestris pv. phaseoli, angular leaf spot of cotton. [7]
Erysiphe cichoracearum is a fungal plant pathogen that causes powdery mildew disease of cucurbits, including melon, cucumber, pumpkin, and squash. [1] The primary symptoms are white, powder-like spots on the leaves and stems. Sphaerotheca fuliginea causes a similar looking powdery mildew of cucurbits.
Infected plants display white powdery spots on the leaves and stems. [1] This mycelial layer may quickly spread to cover all of the leaves. The lower leaves are the most affected, but the mildew can appear on any above-ground part of the plant.
The leaves of these plants turn mosaic and their rugosity is often changed, making leaves wrinkled and misshapen. Growth of these plants is usually also stunted and produces few flowers. Often, cucumber fruits are oddly shaped, appear gray, and tasted bitter. These appearances lead to them being referred to as "white pickles". [citation needed]
These are the most common causes of brown spots on fiddle leaf fig foliage, plus simple tips for restoring your plant’s health.
Cucumber leaves afflicted with various stages of Cucumber mosaic virus. A mosaic virus is any virus that causes infected plant foliage to have a mottled appearance. Such viruses come from a variety of unrelated lineages and consequently there is no taxon that unites all mosaic viruses.
White spots on nails, also known as leukonychia, are usually harmless but may indicate a medical condition. Dermatologists explain common causes and treatment. What Dermatologists Want You to Know ...
The cucumbers recalled are Walmart’s Marketside Fresh Cut Cucumber Slices sold between Oct. 12 and Nov. 26. According to the FDA, the sliced cucumbers were sold in 34 stores across Texas.