There are a few easy steps you can take to prevent the problem in your garden or on your houseplant. Date palms can add an exotic flare to the landscape or be used to transform a humdrum backyard into a tropical paradise in areas warm enough for them to be planted outdoors year round. Leaf spots are a fungal infection most common in seedlings and young pygmy date palm trees. The best solution is to check the roots and revisit the care you give it. They’re primarily cosmetic, so you don’t need to panic right away. The spots are in fact dead leaf tissue caused by the fungus that spreads the disease. False smut, also known as graphiola leaf spot, is caused by a fungus that feeds on plant tissue. Date palms with leaf spot disease are often suffering from nutritional deficiencies at the same time that their fungal pathogens take hold. 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Other Palm Tree Problems Air Roots Certain species of palms, particularly date palms, will put out above ground roots that look like stubble around the base of the palm. Graphiola leaf spot is a fungal leaf disease caused by Graphiola phoenicis. These spots are a clear indication that a fungal pathogen is feeding on the dermal tissues of your date palm. Find more gardening information on Gardening Know How: Keep up to date with all that's happening in and around the garden. Remove and destroy affected leaves before chemical application. Eventually the leaf turns brown and falls to the soil where the spores sit and wait for the next available warm, wet, plant surface so the fungal leaf spot process can begin again. Leave enough space between your pots for good air circulation. Spotted leaves occur when fungal spores in the air find a warm, wet, plant surface to cling to. Avoid overhead irrigation and splashing the leaves of the Robellini palm with water. Although leaf spot symptoms can look really scary and explode out of nowhere, these diseases tend to be of very little consequence in the long term. As soon as that microscopic spore gets comfortable in its new home, sporulation (the fungal method of reproduction) occurs and the tiny brown fungal leaf spot begins to grow. In most cases, leaf spots will not kill the palm tree, and fungicides are usually not necessary. In the garden, the plant’s leaf spot treatment depends on preference. Sign up for our newsletter. 1. Palms are beautiful plants that flower and produce gorgeous shades of yellow to green fronds. It is not necessary to use fungicides in the nursery if good sanitation and hygiene are practised and most of the usual leaf spot fungi do not respond well to fungicide application so this is a waste of money, will not have the outcome you want and is adding unnecessary chemicals to the environment. Sign up for our newsletter. How to Cure Leaf Spots on a Robellini 1. Leaf spotting of either kind is generally similar in appearance and effect. The primary hosts in Florida are Phoenix species, especially Phoenix canariensis (Canary Island date palm) and Phoenix dactylifera (date palm). In the garden, the plant’s leaf spot treatment depends on preference. Most contain sulfur or copper octanate. Applying nitrogen to active leaf spot fungus will literally melt a lawn down to the runner. From indoor and outdoor gardeners alike, one of the most common gardening questions is, “Why do my plants have spotted and brown leaves?”. Read the directions on the fungicide package and add the recommended amount along with the recommended amount of water to your sprayer. 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. Also, if it’s planted in tight proximity to other plants, you may want to consider digging either the palm or the other plants to increase the air circulation. per 4 L.) of water. Prevention and treatment of both kinds often involve the same practices. Planting with Foresight Purchase resistant varieties of plants. Always treat pruning and cutting tools with a 1:10 bleach solution after each use. When possible, purchase disease-free plants of resistant cultivars. The foxtail palm thrives in many conditions and … Limit contact time with water by... 2. Southern AG Insecticides Liquid Copper Fungicide is the best way to protect all kinds of plants from problems caused by bacteria and fungi, including all kinds of algae and Spanish moss. All these diseases can cause serious issues with your garden, algae on your lawn, or the trees on your property. As soon as you see plant leaf spots, treatment begins. Each one contains signs and symptoms, treatment strategies, and treatment expectations designed to help you properly diagnose diseases and provide effective solutions. Anthracnose (leaf blight) is a fungus that winters on twig tissue on the tree. Instead, water the palm at the base, either manually or using an irrigation system, and at a time of day that will allow the palm to dry completely and as quickly as possible. If damage is becoming severe, fungicidal sprays containing copper can be used (see Table 1 for specific products). The most common problem these plants have, by and large, are leaf spot diseases. Treatment is to severely prune the fronds, treat with fungicide and add iron-corrective nutrients. The initial size may be as small as a pin point. If stability is a problem, soil can be mounded up around the palm. Those plant leaf spots are caused by one of nature’s most basic organisms: a fungus. The fungal blight can sustain itself … Take note that of all these palm diseases, only calonectria leaf spot, graphiola leaf spot, leaf spots, leaf blights, and petiole blight have known cures. Sometimes, brown spots on the leaves of a foxtail palm are caused by too much moisture in the air. 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. If palm fruits are used for food purposes, copper fungicides are the only approved fungicides. So it’s really important to consider the air circulation around your plant and how you water it before you begin any sort of fungal eradication program. In the garden, water in the early morning so the moisture will evaporate from the leaves. The disease is enhanced by cool, wet conditions. The best way to control leaf diseases is to reduce excessive shade and ensure adequate air movement.