Rice Thrips( Stenchaetothrips biformis)

Symptoms

• The crop is highly susceptible in the nursery stage for the first 23-25 days after transplanting/ sowing.
• Both nymphs and adults lacerate the tender leaves and suck the plant sap. This cause yellow or silvery streak on the leaves of young seedlings.
• Typical symptom of attack is the tips of leaves getting rolled longitudinally into needle like outgrowths and turned whitish. It causes damage both in nursery and main field.
• The infestation may be rated as mild, if there is less than 3 needle like leaves and as severe, if there are more than 3 outgrowths with the lower leaves also showing chlorosis ans scorching.
• The larvae is yellow in color and adults are dark brown in color.

Management

• Flooding to submerge the infested field for two days is very effective

Chemical Control

Sl.No	Generic Name	Trade Name	Color code	Dosage/litre	Knapsack Sprayer (Capacity 10L)	Dosage/acre (200 L)	Dosage/hectare (500 L)	Remarks
1	Dimethoate 30 EC	Nugor, Rogor, Tagor, Tara 909	Yellow	1.5 ml/ litre of water	15 ml	300 ml	750 ml

Extremely Toxic

Highly Toxic

Moderately Toxic

Slightly Toxic