Papaya (Carica papaya)
Cercospora Leaf Spot (Cercospora papaya)
Symptoms
- Small brownish specks on the upper surface of the leaf- which increase in diameter to 2-4mm diameter
- The spots are circular with a depressed halo
- Spots coalesce together and form bigger blotches with necrotic margin and the leaf starts curling and drying
- The corresponding lower side of the leaves develop greyish brown depressed patches
- In severe cases, innumerable spots occur resulting into drying and shedding of the leaves
Management
- Collection and destruction infected leaves.
Chemical Control
| Sl.No | Generic Name | Trade Name | Color code | Dosage/litre | Knapsack Sprayer (Capacity 10L) | Recommendation | Remarks | |
|---|---|---|---|---|---|---|---|---|
| Per acre (200 L) | Per hectare (500 L) | |||||||
| 1 | Mancozeb 75 WP | Devidayal M-45, Dhanuka M-45, Dithane, Dithane M-45, Hilthane, Hindustan M-45, Indofil M-45, Izeb M-45, Manzate, Luzen 45, Macoban M-45, Mancosaan, Mancosaan M-45, Manzeb 75 WP, Maneb Manzane, M-Guard, Savour M-45, Tata M-45, Eurofil-NT, Uthane M-45, Veera, Zinthane | Green | 3 g/litre of water | 30 g | 600 g | 1500 g | |
| 2 | Copper Oxychloride 50 WP | Bensaan, Blitox, Blue copper, Bluetrox, Copter, Cupramar, Cuprina, Dhanucop, Fytolan, Fytox, Fytran, Fytolan, Hilcopper, Killex copper, Maincop Dhanucop, Star cop, Tagcop, Trucop | Blue | 2-3 g/litre of water | 20-30 g | 400-600 g | 1000-1500 g | |
Extremely Toxic
Highly Toxic
Moderately Toxic
