Crossandra (Crossandra infundibuliformis)
Leaf Blight (Colletotrichum crossandrae)
Symptoms
- Rapid and complete chlorosis, browning, and then death of plant tissues.
- Development of brownish, depressed necrotic areas surrounded by reddish and slightly raised margins.
- Initially the spots appear as brownish specks darker as they expand.
- Lesions are more prominent on lower leaves and confined to the margins.
- Infected leaves roll up, shrivel and drop off, leaving a barren stem with a whorl of young leaves at the top.
Chemical Control
| Sl.No | Generic Name | Trade Name | Color code | Dosage/litre | Knapsack Sprayer (Capacity 10L) | Recommendation | Remarks | |
|---|---|---|---|---|---|---|---|---|
| Dosage/acre (200 L) | Dosage/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 | Carbendazim 50 WP | CBavistin, Benfil, Bengard, Benlate, Benmain, Bensaan, B-stin 50 WP, JK Stein 50 WP Carben, Carziim 50, Dhanustin, Dhanustin 50 Wp, Fungiguard Gancarzin 50, Glizim, Mintho Tagstin, Tiara, Zoom | Green | 1 g/litre of water | 10 g | 200 g | 500 g | |
കെ എ യു കാര്ഷിക-സാങ്കേതിക വിവര ജാലകം
ഇ - പഠന കേന്ദ്രം
കേരള കാര്ഷിക സര്വ്വകലാശാല
കെ എ യു കാര്ഷിക-സാങ്കേതിക വിവര ജാലകം
ഇ - പഠന കേന്ദ്രം
കേരള കാര്ഷിക സര്വ്വകലാശാല