Powdery mildew in mint

A picture of mint leaves suffering from powdery mildew in mint

Powdery mildew is a fungal disease that is considered one of the most dangerous diseases that affects many agricultural crops such as wheat, barley, grapes, and crops of the cucurbit family such as cucumbers and zucchini. Different crops are infected with different strains of fungi from the order Erysiphales. This disease is easy to recognize due to its clear, white flour-like symptoms.

Symptoms of the disease

Fine white spots appear on the upper and lower surfaces of leaves and stems.

Under favorable conditions, the disease causes huge losses. It also reduces

Powdery mildew grows well in environments with high humidity and moderate temperatures.

Greenhouses provide a moist, temperate environment ideal for the spread of disease. This causes harm to agricultural and horticultural practices as powdery mildew may flourish in the shade of greenhouses. In an agricultural or horticultural setting, the pathogen can be controlled using chemical methods, bioorganic methods, and genetic resistance.

It is important to be aware of powdery mildew and its management because the resulting disease can significantly reduce important crop income.

In an agricultural setting, the pathogen can be controlled using chemical methods, genetic resistance, and precision farming methods.

Conventional chemical control

The use of standard fungicides is an effective way to control powdery mildew on plants.

It is recommended to begin conventional fungicide spray programs when you first notice symptoms and signs of powdery mildew.

These pesticides should be used regularly to get the best results against the disease. Triadimefon and propiconazole can be used, and it is also possible to use hexaconazole, mycobutanil, and penconazole.


Here are tips to protect plants from powdery mildew:

  • Choose plant varieties that are resistant to this disease.
  • Plant plants in sunny areas.
  • Choose fertilizer based on soil test results.
  • Leave a good spacing between plants; So that each of them gets adequate ventilation.
  • Examine several leaves of mature plants to ensure they are not infected with the disease.
  • Weed removal.
  • Avoid excessive use of nitrogen.

Survival and spread

Resting spores are responsible for primary spread and airborne spores are responsible for secondary spread

Powdery mildew in mint - the world of plants

Powdery mildew in mint - the world of plants

Powdery mildew in mint

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