Rice Yellow Stem Borer ( Scirpophaga incertulas)

Symptoms

• Incidence is high from October to January and February
• In the vegetative phase, the central shoot dies off turning yellow in colour (dead heart).
• In the ear bearing stage, the ear head appears completely chaffy and white in colour (white ear head).
• Both come out easily when pulled up and show indication of feeding injuries at the base.

Management

• Adopt synchronous planting.
• Cut the leaf-top to reduce carry-over of eggs from the seed bed to the field (Not suit for bacterial leaf blight prone area).
• Avoid close planting and continuous water stagnation at early stages.
• Apply the recommended nitrogen in split doses.
• Collect eggs and observe for parasitism.
• Grow resistant varieties like IR-20 in areas where stem borer attacks are common.
• Use pheromone traps to control stem borers.
• Spray Azadirachtine 1% @ 750 ml/ha.
• Release of egg parasitoid Trichogramma japonicum and T. chilonis each @1 lakh/ ha at weekly intervals from 15-30 days after transplantation or 25-30 days after sowing or immediately after noticing moth activity.
• Spray Bacillus thuringiensis @ 200gm/ha, fish jaggery extract @ 6ml/L, Chitin based Pseudomonas 2.5 Kg/ha, Beauveria bassiana @ 10gm/L.
• Set up light traps to monitor the population of moths.
• Harvest the crop up to the ground level and destroy the stubbles with plough immediately after the harvest.

Chemical Control

Sl.No	Generic Name	Trade Name	Color code	Dosage/litre	Knapsack Sprayer (Capacity 10L)	Dosage/acre (200 L)	Dosage/hectare (500 L)
1	Quinalphos 25 EC	Agroquin, Anuphos, Guin Guard Tagquin, H.LX, Hilquin Geelux, Kinalaux Exalux, Krilux, Quinaswan Flash, Quincid Starlux, Rambalux Quinolux	Yellow	1- 2 ml/ 1litre of water	10-20 ml	200-400 ml	500-1000 ml
2	Flubendiamide 39.35 SC	Applaud, Koram, Jawaa, Flotis, Ninja, Apple, Lapa Pi Bupro, Tagvoltage, Banzo, Bipimain, Swaltrust	Blue	1.6 ml/litre of water	16 ml	320 ml	800 ml
3	Carbosulfan 25 EC	Marshal, Aaatank	Yellow	2 ml/ litre of water	20 ml	400 ml	1000 ml
4	Cartap hydlochloride 50 SP	Beacon SP, Caldan SP, Celtap 50 SP, Fast Kritap 50 SP, Hilcartap , Kaardon 50 SP, Padan	Yellow	2 g/ litre of water	20 g	400 g	1000 g
5	Indoxacarb 15.8 EC	Avaunt, Dhawa gold, Fego,PI Indox	Yellow	0.4 ml/ litre of water	4 ml	80 ml	200 ml
6	Malathion 50 EC	Agromala, Agromala Malathion, Celthion, Hilmala, Kthion, Malaacid, Simala Milthion, Tagthion Malamar, Thisol	Blue	2 ml/ litre of water	20 ml	400 ml	1000 ml
7	Fipronil 0.3 GR	Corofip GR, Ferodan GR, Fipro plus GR, GR Agadi, Mahaveer , Regent, SC Fax GR, Stargazette , Tag Agent GR	Yellow	25 g	250 g	5 kg	12.5 kg
8	Chlorantraniliprole 18.5 SC	Coragen	Green	0.3 ml/litre of water	3 ml	60 ml	150 ml
9	Chlorantraniliprole 0.4 G	Ferterra	Green	20 g	200 g	4 Kg	10 Kg
10	Acephate 75 SP	Acefex, Ace, Asataf, Corochamp Dhanraj, Hilphate Lancer, Lucid, Oval Pace, Starthene Tagace, Tamaron, Torpedo	Blue	1.5-2g/ litre of water	15-20 g	300-400 g	750-1000 g
11	Spinosad 45 SC	Spintor, Taffin, Tracer	Blue	0.2 ml/ litre of water	2 ml	40 ml	100 ml

Extremely Toxic

Highly Toxic

Moderately Toxic

Slightly Toxic