Leaf folder (or) leaf roller: Cnaphalocrocis mainsails / Marasmia patnalis
Symptom of damage:
- Leaves fold longitudinally and larvae remains inside
- Larva scrapes the green tissues of the leaves, becomes white and dry
- During severe infestation the whole field exhibits scorched appearance
Identification of insect pest:
- Egg: Flat, oval in shape and yellowish white in colour
- Larva: Greenish translucent
- Adult: Moth is brownish with many dark wavy lines in centre and dark band on margin of wings.
Management:
ETL: 10% leaf damage at vegetative phase and 5% of flag leaf damage at flowering
- Release Trichogramma chilonis @5 cc (1,00,000/ha) thrice at 37, 44 and 51 days
- Avoid excessive nitrogenous fertilizers
- Keep the bunds clean
- Spray NSKE 5 % or carbaryl 50 WP 1 Kg or chlorpyriphos 20 EC 1250 ml/ ha
- Spray any one of the following insectcides
- Phosalone 35 EC 1500 ml/ha
- Chlorpyriphos 20 EC 1250 ml/ha
- Carbaryl 50 WP 1.0 kg/ha
- Acephate 75 % SP 666-1000 ml/ha
- Azadirachtin 0.03% 1000 ml/ha
- Carbosulfan 6% G 16.7 kg/ha
- CartapHydrochloride 50 % SP 1000 g/ha
- Chlorantraniliprole 18.5% SC 150 g/ha
- Chlorantraniliprole 0.4% G 10 kg/ha
- Dichlorvos 76%SC 627 ml/ha
- Fipronil 80%WG 50-62.5 g/ha
- Flubendiamide 39.35% M/M SC 50 g/ha
- Triazophos 40% EC 625-1250 ml/ha
- Phosphamidon 40% SL 1250 ml/ha
- Flubendiamide 20% WG 125-250 g/ha
- Thiamethoxam 25% WG 100 kg/ha
Source –
- TNAU Agritech Portal.
