Peppermint rust disease: causes, symptoms, control

Photo of leaves suffering from Mint rust disease

Mint rust disease is a fungal disease that greatly affects the quality and productivity of the mint plant. And in this article on your site botanist WORLD of PLANTS, we will learn about the symptoms of this disease and ways to combat it to maintain the health of the mint plant.

Definition of peppermint rust disease

  • Mint rust disease: Puccinia menthae
  • Cause: It is a mint ergot mushroom (Puccinia Menthae)
  • Mint rust disease is Fungal disease caused by Puccinia menthae

Mint rust is known as one of the most common fungal diseases in the mint plant, and it can also affect some leafy herbs such as marjoram, and its symptoms are expected to begin to appear from spring to autumn, and this disease causes orange and brown spots on the underside of the leaves, and can lead to partial or complete collapse of the plant .

Watering plants from above can help the spread of the disease, thanks to watering loosening in order to allow better air circulation, which helps reduce the spread of the disease. Mint rust can be managed by spraying with fungicides, and it is known that the mint plant is easy to grow and spread, but it is also susceptible to pests such as: aphids, spider mites, mint root borer, and it may also be exposed to many diseases, the most famous of these diseases; mint rust, the subject of today's article.

Etiology of mint rust infection

Mint rust disease - botanist

Some etiologies activate the mint ergot fungus (Puccinia Menthae), which is the main cause of mint rust disease, including these etiologies:

  • High temperatures as well as high humidity.
  • The remnants of winter diseases remain on the mint.
  • Breeding substances and air movement help to raise the incidence of mint rust.

Symptoms of mint rust infection

The following is a list of the most important symptoms that indicate that Mint is infected with rust :

  • The appearance of deformed shoots in the spring.
  • Orange blisters form on the stems and leaves.
  • The color of the pimples turns from Orange to dusty yellow, then dusty black.
  • The death of large areas of leaf tissue, causing their complete death.

The spread of mint rust

Here is an explanation of the most important information regarding the spread of mint rust:

  • The fungus is spread from one plant to another by the wind, the orange pustules of which begin to ripen in June-July.
  • Symptoms begin to appear on plants newly infected with mint rust in the spring following the time of infection.
  • Fungi are widespread in the leaves of plants in general.

Treatment and control of mint rust disease

The fight against Mint is carried out by one of the following methods:

  • Non-chemical control: it is carried out by removing infected plants, before the appearance of black fungus begins, taking care to remove the roots as well, identify uninfected stems and transfer them to a soil free of diseases.
  • Heat treatment: it is an example of non-chemical control, through which the roots are washed in early autumn with hot water at a temperature of 44 degrees Celsius, for 10 minutes and then cooled with cold water, and the temperature of 44 is the fatal degree for fungi that infect mint with rust.
  • Chemical control: no fungicides or insecticides are available that eliminate rust disease, but pesticides can be used to avoid the occurrence of infection.

The fight

Infected plants and roots must be removed to prevent their spread. Heat treatment of the roots may help control the disease, immersing them in hot water at 44 degrees Celsius for 10 minutes, then cooling them using cold water and then infusing them as usual. Do not water from the top, and if so, water at the beginning of the day so that the leaves dry during the day. It is advisable to ventilate the plants by spacing them. It can be combated with the use of plantavax insecticide at the rate of 100 / 100 liters of water

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References

Peppermint rust disease: find out its causes and methods of treatment – the topic of cultivation
Pests and diseases of mint-wikifarmer
Mint: how to grow and care for it – the site of modern cultivation technologies

Mint rust disease - botanist

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