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Common Types of Garden Fungi

Many gardeners have had to deal with diseases infecting their plants. Garden diseases affect the health of plants. These diseases can develop because of fungi. Knowing the signs of plant diseases can help you catch a problem early. Check out a few fungal diseases that can attack your plants. 


Black spot

Anthracnose, or black spot, causes irregular shaped spots on leaves, produce, flowers, and trees. These spots are small and brown when plants are first infected. As this disease spreads, the spots become darker. Anthracnose is most likely to occur when conditions are cool and damp. Leaves may curl or drop when infected with anthracnose.

Powdery Mildew

Powdery mildew

Powdery mildew can affect a variety of plants. Flowers, fruit trees, shrubs, and grasses can deal with powdery mildew. This disease appears as whitish-gray spots and patches. You may also notice yellowing leaves or leaves falling off plants. Powdery mildew develops in warm, dry climates.


Rust on plant

Another common fungal disease is rust. This disease needs moisture to develop, so be careful not to overwater your plants. Rust spreads through spores that are transferred by water or wind. It causes red blisters on the bottom of leaves and yellow spots on the top of leaves. There may be reddish-orange specks on leaves too.

Leaf Spot

Leaf spot

If you notice brown or dark spots on plant leaves, you could be dealing with leaf spot. This develops after a fungus in the soil infects plants. Leaf spot can affect a variety of plants. It is common when moisture and warm air are present. This disease can cause leaves to die, and it can spread to other plants. It’s important to keep leaves dry to avoid leaf spot.



Another fungal disease is blight. Two types of blight can affect your plants—early and late blight. Early blight results in dark spots with yellow rings surrounding them. These spots will fall off, creating holes in leaves. Late blight can cause spots on leaves and stems. Wilting can occur if plants are infected with blight. Humid, warm environments can cause blight to develop. 

To keep your plants healthy, you have to know what diseases can affect them. Pay attention to your garden and keep your eyes open for signs of trouble. If your plants are under attack, we have your back! Our plant-based Maggie’s Farm Simply Effective™ 3-in-1 Garden Spray can help prevent and control diseases as well as mites and insects.

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