Fungal Diseases: Leaf Spotting | Series 2

Posted by Team Orchid-Tree on

Symptoms

Leaf spotting infections are caused by Cercosporoids, Guignardia & Phyllosticta & Septoria. Generally the symptoms appears as yellow, brown or black spots on the leaves or underneath leaves.

 

Image result for leaf spots on orchidsImage result for leaf spots on orchids

Image result for leaf spots on orchids

 

Treatment

Spray the plants with mentioned dosage and clean the growing area with Hydrogen Peroxide diluted with water at a 1:10 ratio. 

Following Fungicide is effective:

  • Chemical Name: Combimnation of Boscalid and  Pyraclostrobin (Brand: Signum, Visma etc.) 1g/L of water
This chemical combination is also effective against:
  • Anthracnose
  • Blossom blight
  • Crown and basal rot
  • Phytophthora aerial blight
  • Crown and soil-borne diseases

    Keeping the plants drier will help to keep infection from spreading or appearing again. Isolate the plants and observe the plants for 1-2 weeks. And apply another round of control spray with any of the above fungicides. Spray the plants early morning and  keep the plants dry after the spraying. Don't water the plants same day spray treatment is done. 

     

    Prevention

    • Avoid Over-watering
    • Provide good circulation
    • Frequent Inspection 
    • Isolation of suspicious plants
    • Precautionary control sprays 

     


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