Spots on Pepper Leaves are common in the summer months and can be caused by a number of different factors. First, the leaves and stem of the plants take on a deep green color, and small bumps may appear on the leaves and stem. These small bumps are the spots and are caused by the bacteria, Fusarium spp, and the mold, Sclerotium rolfsii.

Pepper leaves are a common plant in many regions of the world, and it’s likely you’ve taken a bite of something that’s been on a pepper leaf at some point. Pepper leaves are usually not toxic, so you may want to place one on the back of your hand to determine if you have pepper leaf toxicity. If you do have this condition, consult the information below to find out how to treat it.

Pepper leaves are an important part of the Indian cuisine and are widely used in daily cooking. They are used to make innumerable dishes and snacks of different tastes and textures. Among the most important of these dishes are curries, pickles, salads, and curd. The leaves have a varied nutritional profile, and they are an excellent source of energy for the body. Apart from being used for culinary purposes, they are also used in herb and medicinal products for their medicinal properties.

When peppers are grown from seed, a number of problems can arise during the course of the year. One of the most common questions we get is about the different types of stains on pepper leaves.

Judging by the appearance and location of the spots on your pepper’s leaves, the cause may be insignificant, but it may also be harmful to your plant. In this article, you will learn how to identify and diagnose the different types of stains on pepper leaves.

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White and brown leaf spots on pepper

White patches on pepper leaves

The first and most common type of spots on peppers are white spots. However, the spot color is only part of the equation. So let’s take a look at a few different types of white spots on pepper leaves and discuss each one.

Sunburn stains

If you see large white or gray spots on your pepper leaves, sunburn is almost certainly the cause. They may appear as small dots or large spots, especially on older leaves.

White spots on pepper leaves are sunburn.

We start here for a reason: it’s very common to see sunburn on peppers. This usually happens shortly after the plants are put outside in full sun.

Sunburn is primarily a plant-based problem. Poor hardening off causes this leaf burn in many plant species, including peppers. White spots are burnt and dried out leaf tissue that has died.

The affected parts of your pepper leaves will crumble when you squeeze them and will not regain their green color. Over time, the leaves may fall off the plant completely. It can be devastating if you put uncured plants in full sun!

The solution to sunburn:

  • Let the plants harden off gradually
  • Start tempering on cloudy days or in the shade.
  • Provide shade during the midday sun

Sunburn is usually not a death sentence for peppers. But it can affect not only the leaves, but also the fruits! If your plant’s fruit is exposed to direct sunlight, the skin can burn and turn white, leading to rot or mold.

Try to shade peppers during the hottest summer days by placing potted plants in the shade. You can use floating intercrops or plant something else in the ground to prevent the intense afternoon sun from burning your peppers.

Small white spots

Then, small white spots or holes on the leaves of the peppers. These little spots could be anything, so let’s look at some photos for reference.

Plant oedema

Small white patches on underside of pepper leaf – plant oedema

What is plant swelling? Edema is a fluid accumulation that can affect many plant species. It is not a disease and cannot be transmitted from one plant to another. It also does not affect all varieties of pepper, so some plants may get sick and others may not.

Plant swelling is common in young indoor pepper plants. It is generally believed that the cause lies in the environment related to the air circulation and relative humidity in your grow room. For more information on swelling plants, click here.

To alleviate pepper swelling, use a fan to circulate the air and bring fresh air to the plants. I like to have an oscillating fan that blows at least 3-4 hours a day on my plants when they are inside.

Fortunately, the swelling always goes down as soon as the plants go outside. Existing swellings on the leaves will not disappear, but they should not occur on new growth.

Damage caused by insects

Some insects only nibble on your plant (like caterpillars and slugs), others suck the sap from the inside of the plant. This can cause white, brown or yellow spots on the leaves of peppers.

Infestation by aphids on pepper plants

Although the spots are not always white, their location tends to be random. Check under the leaves and near the young leaves for signs of unwanted pests.

For more information on controlling aphids and other insects, click here.

Black dots

Let’s move on to the second most common type of stain: black spots on pepper leaves. There are several possible causes of black spots, from insect droppings to diseases. We will focus on a common bacterial infection that can affect peppers.

Pepper leaf spot

A common plant disease that can affect peppers is called pepper leaf spot. Frogea leaf spot disease is common in hot, humid climates with high rainfall and can be devastating to your plants.

Pepper leaf patches – black and yellow

Although the disease does not kill your plant, it can quickly affect the leaves of the entire plant. It can also cause poor yields of peppers and spread from plant to plant.

Symptoms of pepper spot disease :

  • Numerous black and white spots on pepper leaves
  • The spots are white in the middle and surrounded by black and yellow.
  • spots affecting the whole or most parts of the plant

A solution for the control of leaf spot disease in peppers:

  • Remove and discard affected plant parts. If only a small part of the plant is affected, cut it off.
  • Spray with an organic fungicide in the indicated solution. They can help prevent the spread of the disease by destroying the spores. Message: Be careful with the fungicide copper – make sure you don’t get it on your skin, as it can cause burns.
  • Transplant pepper plants to a different location each year to avoid accumulation of large numbers of spores.

Pepper leaf spot can be transmitted from seed, soil or from another plant. To prevent spores from the soil reaching your plants, we recommend that you cut off the lower leaves during the season.

Always keep your garden clean before going outside to avoid spreading spores from one plant to another. Also, water from below so that water does not collect on the leaves.

Brown patches

Depending on which part of the site you visit, brown spots on pepper leaves can be caused by any of the problems listed above. However, there is one common problem that causes brown spots.

Bacterial leaf spot disease of pepper

The name is similar to pepper leaf spot, but it is a different bacterium. In terms of appearance, bacteria stain is very different from pepper stain.

Brown spots on pepper leaves – fungal infection

Bacterial leaf spots are caused by hot, humid, wet weather. It is incredibly common in most places, except in areas with very dry summers. In other words: If you don’t live in the desert, you might notice this problem.

Symptoms of bacterial spot on peppers:

  • Yellow spots turn brown or grey
  • Pointed and usually not round in shape
  • Widespread in countries with a hot and humid climate

Solutions for fighting bacteria stains :

  • Remove affected plant parts and remove them from the garden.
  • Fertilize with a phosphorus- and potassium-rich fertilizer. These nutrients help peppers fight disease and stay healthy.
  • Spray the affected parts of the plant with an organic fungicide.
  • Always work with clean hands and avoid cross-contamination of plants.

Tip: Bacterial leaf spots grow in water. Therefore, when watering, it is important to avoid water getting onto the leaves of the plant. Also, do not work in the garden or harvest when the leaves are still wet from the rain.

If heavily infested plants have not recovered from leaf spot disease, remove the entire plant and collect all fallen leaves. Prevention is better than cure, because these bacteria can spread to other plants.

Nutrient burning

Another possible cause of brown spots on pepper leaves is fire blight. Inorganic fertilizers use chemical forms of nitrogen that are easily absorbed by plants. In the right concentration it works very well, but if the concentration is too high it can damage the plant.

Nutrient burns on a pepper leaf.

Excess nitrogen can usually be seen in brown spots on the leaves and edges. If you did not follow the instructions on the fertilizer, this could be the reason.

We always recommend the use of organic nutrients, as they usually remain available to the plants for longer. Organic material generally needs to be broken down by bacteria before it can be converted into usable forms of the major elements.

Read more:

While this does not cover all possible causes of pepper stains, it does cover some common problems. I hope this helps you diagnose a problem with your plant’s leaves, and feel free to share your thoughts below.


One of the original ones! When he’s not gardening and learning about peppers and botany, Calvin is traveling to new places or making music.Pepper trees are beautiful plants that come in many varieties. Some of the most popular varieties include the popular green, white or aniseed pippali. These are the varieties that are commonly used to make medicines and cosmetics. One of the most common uses of the pippali tree is in the production of the herb “methi” or “turmeric”.. Read more about bacterial spot on peppers and let us know what you think.

Frequently Asked Questions

How do you treat pepper leaf spots?

Pepper leaves are a great element to add to salads, but if you notice spots on your leaves, diagnosis and treatment is important to know. Pepper Leaf Spots is a common disease of plants, especially of house plants. It is characterized by the formation of pale or greyish spots caused by the fungus Puccinia graminis. The most frequently attacked plants are pepper plants (Piper nigrum), tomato plants (Solanum lycopersicum) and potato plants (Solanum tuberosum). The disease is rare on vegetables, berries, fruit trees and ornamental plants.

How do you treat brown spots on pepper plants?

Gardeners have their own ways of treating brown spots on pepper plants, like using a mixture of sea salt and vinegar. But, other than that, there is no foolproof home remedy for curing the problem. This is why you need to know the answer to these questions first: Brown spots on pepper leaves are the worst! They’re unsightly, they taint the value of your crop, and they can even cause it to rot before harvest. Often caused by fungal infections, brown spots on peppers can be difficult to diagnose. That’s why we put a list together of plants that we’ve seen with the most commonly reported symptoms.

How is leaf spot disease treated?

The leaf spot disease (LSD) is caused by bacteria that can spread over a wide area. This disease is called economically important, because it affects the quality of the harvest and the productivity. The disease affects pepper, especially the green and red varieties.     Let’s see how the symptoms of the disease can be identified. Recently, I’ve seen more and more of this disease across my vegetable garden and I finally get it. The symptoms of leaf spot disease are not very obvious, but as soon as you get rid of the leaves affected, the spots will go away. The disease is caused by the fungus Spottedleaf Spot (Spottedleaf Streptomycetes) that is transmitted by several different insects, like the leafhopper, the aphid or the leafcutter. The disease spreads from the affected leaves to the healthy ones, and those leaves, which are the first to show the symptoms, will be ready to harvest.

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