It can be disconcerting to find little black spots on your plants. You may be walking through your garden and stop to look at one plant, only to find that there are little black dots all throughout the garden.
The culprit is normally Diplocarpon rosae, which is a fancy name for black spot fungus. Most people are aware that it affects roses, but it can affect any plants that have fleshy leaves and stems.
Black spot fungus normally appears in the spring, particularly when you have temperatures in the sixties and constant rain or water. The spots will appear, and they will continue to grow until the leaves turn yellow and fall off.
Continue to read to learn all about little black dots on your plants and what you can do about them.
What Causes Little Black Dots on Your Plants?
One of the most common signs of plant disease is little black spots that show up on the leaves of your plants.
You might notice a few of them, or they might go undetected for weeks on the bottom of the leaves. If you do not see them right away, they will make your plants weak and kill the plants.
There are different diseases that can lead to these black dots, and it is important to understand which disease is causing the symptoms. This is important so that you can treat your plants effectively.
The first possible disease is Sooty Mold. This disease comes when you have aphids that are feeding on your plants. The aphids leave behind a sugary substance, and the sooty mold is a fungus that grows on this substance.
This disease starts out as small black dots that spread across the leaves. The mold itself doesn’t hurt your plant, but it blocks the leaves from sunlight, which interferes with its ability to perform photosynthesis.
As it spreads across the leaves, it will eventually make it impossible for the plant to get what it needs to survive.
Another possible disease is Powdery Mildew. It will start as white and gray spots on the top of the leaves, and will eventually cover the entire plant. This is also a fungus, and it can stunt the growth of plants. It can also spread to other plants that are nearby.
Black Spot is one of the most common diseases, and it is particularly harmful to rose bushes. It is caused by the warm and wet weather in the spring, after the temperatures climb into the sixties and it rains for many hours of the day.
Finally, another disease is called Leaf Spot. This is actually a generic name for any fungus that leaves black or gray spots on the leaves of a plant. When it occurs on outdoor plants, it is usually caused by a fungus, but indoors, it is usually caused by a bacteria.
Either way, your plants will develop black spots across the leaves that can spread to other plants.
How Can You Prevent Black Dots on Plants?
The best way to prevent black dots on your plants is to take care of your plants and check them regularly. It is important to take action swiftly if you see any signs of black spots on your plants.
One of the causes of black spots on your plants is the sugary residue left behind by aphids. You can control these pests with soapy water, neem oil, or essential oils.
You can also grow some plants that repel aphids nearby. This might include some herbs such as dill and fennel, or catnip and marigolds.
Vinegar is another substance that you can use, as it is lethal to all insects. It is important to protect your plants from aphids if you want to prevent black spots from appearing.
In addition, you need to make sure that your plants have ideal conditions. Healthy plants are far less likely to succumb to diseases. You can do this by making sure that your plants have good airflow and circulation.
In addition, make sure that you give your plants plenty of water, but do not water the leaves. Make sure that you do what you can to limit the amount of time the leaves stay wet.
You need to make sure that you prune the plants if any of the leaves do become diseased. You should also be sure to prune your leaves in the late winter or early spring.
Another way to prevent black spots is to add a thick layer of mulch around the plant. You can also make sprays that will help to prevent black spot diseases from occurring.
You can use baking soda and warm water and spray your plants as a preventative. You can use other products such as neem oil, fungicides, insecticides, and sulfur.
These substances will prevent insects that lead to plant disease as well as fungi and mold itself.
How to Treat Plants with Little Black Dots
If you find black spots on your plants, you will need to get rid of them. The black spots are mold and fungi, so the spores can travel in the breeze.
You should check for any signs of this disease regularly, and you need to address it right away when you find it.
You should treat your plants with a fungicide or a natural product such as neem oil, soap, or baking soda. This will change the pH of the surface of the leaf so that the fungus cannot survive.
In addition, make sure that you prune your plant and clip off any leaves that are overcome by the fungus.
Make sure that you get rid of any affected leaves by throwing them out in a sealed garbage bag or by burning them. You should also let the plants sit in the sunlight and make sure that they get plenty of air circulation so that they will be healthy and survive.
Noticing black spots on your plants can be upsetting, but you can take care of it when you notice this problem. Take steps to prevent black spot disease from affecting your plants, and make sure that you treat it right away when you notice it.
Growing up with a mom who filled her home (inside and out) with all sorts of plants, Lisa got her start in gardening at a young age. Living now on her own with a home and yard full of plants (including an indoor greenhouse), she shares all the gardening tips she’s gained over the years.