Lipid Biosynthesis Inhibition and Target Pests
Spiromesifen operates by inhibiting acetyl-CoA carboxylase, an essential enzyme in insect and mite lipid biosynthesis. Juveniles are unable to synthesize vital lipids for cuticle formation and cell membranes, leading to mortality during molting.
Additionally, adult females exposed to treated surfaces lay sterile eggs, dramatically suppressing population resurgence.
- Whiteflies: Highly effective against Bemisia tabaci nymphs and pupae in cotton, brinjal, tomato, and okra.
- Spider mites: Controls two-spotted spider mites (Tetranychus urticae) and red spider mites across all juvenile stages.
- Translaminar action: Penetrates leaf cuticles to control pests sheltered on lower leaf surfaces.
- Favorable environmental profile: Demonstrates low toxicity toward beneficial adult pollinators and predatory mites when used as directed.
Application Guidelines and Resistance Stewardship
Because Spiromesifen is most potent against eggs and juvenile instars, application should occur early when scouting reveals initial whitefly or mite colonies.
Thorough spray coverage on the underside of foliage ensures complete contact with developing nymphs.
- Use fine hollow cone nozzles to achieve thorough, uniform coverage beneath crop canopies.
- Rotate with alternative chemical groups (such as pyrethroids or diamides) to avoid selection pressure.
- Observe label pre-harvest intervals (PHI) to comply with maximum residue limits.
Official source
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Central Insecticides Board & Registration Committee ↗Related on KisanPe
Common questions
What is the chemical mode of action of Spiromesifen?
Spiromesifen belongs to IRAC Group 23, functioning as a lipid biosynthesis inhibitor that prevents nymphs from developing viable cuticles.
Does Spiromesifen control adult whiteflies?
While it causes adult female sterility and halts reproduction, its primary lethal action is exerted on eggs, nymphs, and pupae.
Which crops are officially approved for Spiromesifen in India?
It is registered for cotton, brinjal, tomato, okra, chilli, and tea per CIBRC approved label recommendations.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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