Damage symptoms and identification
- Chili: Upward and downward leaf curling ('murda' complex), boat-shaped leaves, bronzing of lower leaf surfaces, and flower shedding.
- Cotton: Crinkling and silvering of young seedling leaves, with stunted terminal buds.
- Onion: Silvery patches and white blotches on leaves caused by Onion thrips (Thrips tabaci).
- Viral transmission: Thrips serve as primary vectors for destructive tospoviruses (such as Groundnut Bud Necrosis Virus and Watermelon Silver Mottle Virus).
CIBRC-registered chemical active ingredients
- Spinosyns (IRAC Group 5): Spinetoram 11.7% SC and Spinosad 45% SC providing rapid translaminar knockdown.
- Isoxazolines (IRAC Group 30): Isocycloseram 9.2% SC (PLINAZOLIN active) delivering high control of resistant black thrips.
- Diamides and Keto-enols: Cyantraniliprole 10.26% OD and Spiromesifen 22.9% SC.
- Neonicotinoids and Phenylpyrazoles: Acetamiprid 20% SP and Fipronil 5% SC / 80% WG.
Resistance management and integrated tactics
Because thrips reproduce rapidly with overlapping generations, repetitive use of the same chemical class triggers rapid resistance. Rotate across distinct IRAC groups, install blue sticky traps (30 to 40 traps per acre) to snare flying adults, and avoid spraying broad-spectrum pyrethroids that destroy beneficial predatory mites.
Official source
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Central Insecticides Board & Registration Committee ↗Related on KisanPe
Common questions
Why are blue sticky traps preferred for monitoring thrips?
Thrips are visually attracted to specific blue wavelengths, making blue sticky cards significantly more effective than yellow cards for thrips.
Which active chemistries control invasive black thrips (Thrips parvispinus)?
Isocycloseram 9.2% SC and Spinetoram 11.7% SC provide high translaminar control against invasive black thrips in chili.
Why is rotating insecticide modes of action essential against thrips?
Thrips have short life cycles and high genetic adaptability; rotating different IRAC groups prevents resistant populations from dominating.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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