When the spots first appear, you should locate all leaves with the red spots and cut them off. Late in the growing season the fungus can be seen as dark pustules on the veins and midribs of infected leaves … Or you can try a more traditional treatment by spraying with a mild solution of bicarbonate of soda (baking soda), using ½ teaspoon per gallon (2.5 mL. Diseases like this one tend to spread from the bottom to the top of the infected plant because the spores can’t travel that far. Browning of leaves at edges and near tips: Winter injury: 3. Leaves at the center of the plant are often less severely affected. Edema (also spelled oedema) is often a symptom of moisture stress, which is caused by incongruous watering. For your houseplant, spotted leaves can be prevented by watering the soil and not the foliage. Treat with copper fungicide. Once the fungus takes hold in the red tipped photinia, the disease’s circles continue to grow and merge until large unsightly “sores” cover the dying leaves. Symptoms occur as numerous, initially small circular leaf spots (see photo). Diagnosing this is relatively easy as hydrangea rust looks different than most other … No matter how diligent you are, the day will come when those tiny brown circles appear on the leaves of your plant so it’s important to know how to treat leaf spot fungus. Typically leaves cup downward or curl from the edges (Figure 5). In a matter of days, the spots enlarge and eventually become dark purplish circles surrounding gray, dying tissue. Tinea Versicolor. 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. After drying, the spots will have a papery texture. If you have red spots on your hydrangea plants, there are a number of things that you can do to make sure that this problem does not get out of control. These spots tend to follow the leaf veins and midrib causing only a portion of the leaf to turn brown. Bacterial canker – Bacterial canker causes severe loss of fruit and even the entire tree. Sign up for our newsletter. In the garden, the plant’s leaf spot treatment depends on preference. Shingles. Spots often appear on leaf borders or follow vein paths. Cover the area under and around the shrubs with new mulch to cover any leaf parts and photinia fungus spores that remain. There are a few easy steps you can take to prevent the problem in your garden or on your houseplant. Some insects also cause damage that appears like a leaf spot disease. Gleosporium fungi attack redbud trees, causing all sizes of round or irregularly shaped leaf spots in tan, dark brown, red-brown, purple-brown or black. Leaves off-color: 1. Are your fiddle leaf fig’s leaves covered in little red spots? When an amaryllis has leaf scorch, growers may first notice small red spots along the length of the flower stalk. In the garden, water in the early morning so the moisture will evaporate from the leaves. As soon as you see plant leaf spots, treatment begins. This will increase light and airflow around the shrub and decrease the conditions in which the fungus thrives. Stop misting. The production of spores can be seen in the black blotches inside the circular damage. Height and Spread: 1-2 feet / 1-2 feet. Also I am not aware of your area having the sort of fungal problems that have become known in Australia. Over time, these spots will begin to darken. Problem: A cannabis phosphorus deficiency generally appears on leaves from the lower/older parts of the plant. Fungal leaf spot can be found in your outdoor garden as well as on your houseplant. 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