How to Manage Pest and Diseases in Papaya: Symptoms, Treatment, Control, and Prevention

Papaya Scientifically known as Carica papaya, pawpaw is a tropical American fruit cultivated for its delicious melon-like fruit. It belongs to the Caricaceae family and can grow up to 25 years, reaching 2–10 m heights. The tree’s gender determines its inflorescence type: male trees bear flowers on long panicles, while females have solitary or clustered yellow-green flowers.

How to Manage Pest and Diseases in Papaya

The papaya fruit, a large fleshy berry, features smooth skin that ripens to yellow or orange. The juicy flesh, ranging from yellow to red or orange, houses black wrinkled seeds. Originating from the Caribbean region of Central America, papaya is often replanted every three years for optimal productivity.

How to Manage Pest and Diseases in Papaya

Uses and Benefits of Papaya

Papaya fruits are rich source in vitamins C and A, addressing deficiencies in tropical diets. Immature fruits serve as vegetables in certain regions. The C. papaya tree’s unripe fruits contain papain, which is commercially used to tenderize meat. Papain finds applications in medicine, leather tanning, preventing wool shrinkage, and clarifying beer during brewing.

Propagation and Care in Papaya 

Papaya is propagated by seeds, with young plants requiring consistent care, including watering, fertilization, and protection from pests and diseases. Proper pruning ensures healthy growth and higher yields. Disease management involves addressing fungal, bacterial, viral, and oomycete infections, while insect pests can be controlled using appropriate measures.

How to Manage Common Diseases in Papaya

Managing common diseases in papaya involves a multi-faceted approach. For fungal diseases like Anthracnose, use protective fungicides and hot-water dips. Employ similar strategies for Black Rot and Black Spots, focusing on preventing wounds and controlling humidity. Cercospora Black Spot demands regular protective fungicide applications. For Powdery Mildew, remove infected parts, ensure proper nutrition, and apply fungicides.

Combat bacterial diseases like Canker and Decline through protective fungicides. Address Internal Yellowing with a hot-water dip. Manage Bunchy Top by using tolerant papaya varieties. Control Papaya Ringspot by removing infected plants and practicing virus-free planting. Phytophthora Fruit Rot can be mitigated with protective fungicides and careful soil management.

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Papaya Plantation
  1. Anthracnose and Charcoal Spot (Colletotrichum gleosporoides): Caused by Glomerellacingulata, this fungal disease leads to circular sunken lesions with light brown margins on papaya fruit. Fungicidal sprays and a 20-minute hot-water dip at 45°C are effective in control. Fungi spread through wind and rain, favored by high temperature and humidity. Management includes using appropriate fungicides and dipping fruits in hot water at 48-50°C for 20 minutes.
  2. Black Rot (Mycosphaerella caricae): Characterized by black sunken rot on young fruits, this fungal disease enters through wounds. Effective management involves protective fungicides and a 20-minute hot-water dip at 48°C.
  3. Black Spot (Asperisporium caricae): This fungus causes circular water-soaked lesions on leaves and sunken lesions on fruit. Fungicides and humidity control are recommended.
  4. Cercospora Black Spot (Cercospora papaya):