Its blue-green foliage is great as supporting backdrop to a flowering scene, but the plant itself doesn’t produce blossoms. Questions & Answers Powdery mildew on houseplants is a fungal disease. Cottony masses are mealy bugs, while foliar nematodes cause translucent spots on the leaf tops that turn black. They are growing fine but have very small white specks on them. Scale isn’t obvious, but can stunt the plant. It is possible to propagate more ferns from the spores, but it is tricky so I won't … However, as the fungal growth spreads, the white stuff can cover the entire plant. Ideally, you should give your fern a … T; This content is accurate and true to the best of the author’s knowledge and is not meant to substitute for formal and individualized advice from a qualified professional. Read on to learn how to get rid of powdery mildew on your indoor plants. Confirm by checking the temperature. Look for leaves that have some irregular white spots or look like they've been dipped in powdered sugar. This is often a result of excess water combined with the fern being placed in an area that is too hot. The fungal disease creates a powdery white growth on plant leaves and stems. Blue Star Ferns are all about the leaves. Any time your Bird’s Nest Fern doesn’t seem to be doing well, examine it carefully for signs of insects. Can you post a photo of the entire plant? At the start, the white mold looks like powdery spots. Fern species don't produce flowers, so they reproduce by making spores that are functionally analogous to seeds on flowering plants. Rhizoctonia aerial blight, also known as leaf spot, is evidenced by brown spots and web-like patterns through the leaves and stems of your Boston fern. Those brown dots on the leaf undersides are spores, which is normal. It is not mealy bugs nor white flies. I have three ferns - (1) rabbit's foot and (2) bird's nest ferns that I treasure. Powdery Mildew on Houseplants. Plants That Are Most Susceptible to White Mold. Too much light will cause the leaves to yellow and die. The funny thing on these ferns is that the plant looks very healthy. If you see that, it’s probably powdery mildew. Those black dots at the leaf tips are spores. Those situated in lower light areas will have much flatter leaves. Those leaves do not look like a Fern but rather the leaves of a Palm. Don’t worry unless they are accompanied by signs of infestation. Being able to spot the symptoms of the most common Boston fern pests, though, means you can deal with the problem quickly so damage is limited. It thrives in dry, warm days in the 60s and 70s, followed by cool, humid nights. Most powdery mildews are recognized by the white to gray, powdery spots or large blotches on the surface of leaves, stems and fruits of host plants. Note: The presence of white spots on the foliage and rhizomes is common. Did I mention I have a Houseplant Store! I agree, with Daisyl, the plant appears to have an infestation of scale insects and wiping them with cotton swabs dipped in rubbing alcohol will take care of the problem. For example, if a crispy wave fern was to get a lot of light then the leaves would start to crinkle. That white chalky stuff on your plants is powdery mildew and it needs to be dealt with as the fungus spreads easily. Caterpillars In addition, you can often spot damage that caterpillars have inflicted on the plant as they eat -- it usually shows up as holes along the perimeter or in the center of the leaves. Have treated with Safety Soap but to no avail. Initially, it produces circular powdery white spots on the foliage of plants. 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