Pest infestations may cause mottled spotting.Residual salts in the soil from excess fertilizer can affect roots and lead to spotting symptoms.Brown spots and speckling on leaves may be due to incorrect pH and the lack, or overdose, of specific nutrients.A number of Leaf Spot diseases produce muted spots that resemble those of fungal rust.It’s important to resolve theĪlthough Rust fungus is a classic culprit, there are other causes of leaf spotting that can look similar, so it is important to identify the cause before treating: Throughout the plant or surrounding vegetation. Once these spots mature, the spores can spread What you see on the rust-stricken leaves is actuallyĬaches of reproductive spores. Identify the issue and address it promptly, you can often minimize your lossesįungal rust disease is a common cause of alien-looking,īrightly colored spots. ![]() Treatment or improvements to the plant’s environment. ![]() The problem can usually be mitigated with Overview Of Rust Spots On LeavesĬolored spots popping up on your plant’s prized leaves canīe alarming, but don’t panic. Removing affected leaves, drier conditions, soil adjustment, or chemical sprays can resolve the problem. High humidity and prolonged leaf wetness encourage these pathogens. It shows up as a scattering of orange, yellow or red spots on foliage. Let’s look at why rust spots on leaves happen, how to treat the problem, and the best ways to prevent it from recurring.Ĭauses of rust spots on leaves: Rust is caused by a group of fungi from the Pucciniales order. Fungal rust is a common cause of leaf spotting, though there are other reasons, too. Disfigured leaves are upsetting on any plant, but they’re especially unwelcome on houseplants kept for their beautiful foliage.
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