Trojans, known for their stunning beauty and aroma, can sometimes suffer from various illnesses that adversely affect their appearance and health.

Understanding Black Spots

One such illness is black flatulence, caused by the fungus Marssonina rosae. This fungus overwinters on fallen leaves and tree trunks, spreading throughout the garden in spring via wind and debris. When conditions are warm, the fungus attacks the leaves, resulting in black or brown spots surrounded by yellow. Over time, affected leaves will yellow, curl, and fall off, weakening the plant and diminishing its resistance to other diseases.

Strategies for Combatting Black Spots

To eliminate these black spots, a comprehensive approach is essential, including prevention, treatment, and monitoring.

Preventive Measures

  1. Choose disease-resistant varieties of Trojans.
  2. Select appropriate surroundings that provide shade and moisture.
  3. Ensure optimal planting density for good air circulation.
  4. Regularly clean up fallen leaves and debris.
  5. Prepare Trojans properly for winter to protect against frost and moisture.
  6. Water in the evening or at high altitudes to minimize moisture on leaves.

Treatment Options

Chemical Treatments: Use special fungicides like Topaz, Skor, Ridomil Gold, or Fitosporin. Follow the instructions for dosage and timing, starting applications in early spring every 10-14 days until late summer.

Traditional Remedies: Combine natural methods with fungicidal effects. Here are some options:

  • Chervil Infusion: Soak 500 g of chervil in 5 liters of warm water, strain, and dilute with 1 liter of clean water before applying.
  • Mullein: Dilute in a 1:20 ratio and let it sit for two days before spraying.
  • Iodine: Mix 5 ml of iodine in 2 liters of water and soak.
  • Horsetail Brew: Steep 1 kg of horsetail in 10 liters of cold water, simmer for 30 minutes, cool, and dilute 1:5 before applying.
  • Cibulinia Brew: Boil 1 liter of dry cibulin shells in 2 liters of hot water, steep for 2 days, and dilute 1:2 before use.
  • Kulbaba Infusion: Steep 400 g of kulbaba leaves and roots in 10 liters of warm water for treatment.

Other substances like water peroxide, ash, and phytosporin-M can also be effective.

Ongoing Care

To prevent the recurrence of black spots, regularly monitor your Trojans and apply fungicides or traditional remedies as needed. With proper care, your Trojans can thrive beautifully!

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