Spinetoram Chemical Class and Mode of Action
Spinetoram belongs to the spinosyn chemical class (IRAC Group 5), derived from the fermentation of the actinomycete soil bacterium Saccharopolyspora spinosa followed by chemical modification.
It binds uniquely to nicotinic acetylcholine receptors (nAChRs) at a site distinct from neonicotinoids, causing continuous neural excitation, paralysis, and rapid pest mortality without cross-resistance.
- Chemical Name: Spinetoram (a mixture of spinetoram-J and spinetoram-L components)
- Standard Formulation: 11.7% SC (Suspension Concentrate) widely registered under brands such as Delegate
- Systemic Penetration: Excellent translaminar movement protecting both upper and lower leaf surfaces
Primary Target Pests and Benefited Crops
Delegate provides control over hard-to-reach pests that reside on the undersides of leaves or inside flowers, notably thrips and lepidopteran larvae.
Because it acts rapidly on insect nervous systems, target pests stop feeding within hours of ingestion, halting crop damage immediately.
- Chilli and Pepper: Chilli thrips (Scirtothrips dorsalis) and fruit borers (Helicoverpa armigera)
- Cotton: Spotted bollworms and tobacco caterpillars
- Horticulture and Floriculture: Western flower thrips, diamondback moth in cole crops, and leaf miners
Application Best Practices and Resistance Management
To prevent pest resistance, rotate Spinetoram with chemistries having alternative modes of action, such as diamides or organophosphates.
Never exceed the maximum number of labeled seasonal applications per crop cycle, and strictly adhere to pre-harvest intervals (PHI).
- Coverage: Use hollow-cone nozzles calibrated for fine misting to reach hidden floral thrips
- Water Quality: Clean, neutral pH water enhances the stability and foliar absorption of spinosyn particles
- Safety Profile: Relatively benign to many predatory mites and beneficial insects once spray deposits dry
Official source
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Central Insecticides Board & Registration Committee ↗Related on KisanPe
Common questions
What is the technical name of Delegate?
The active ingredient in Delegate insecticide is Spinetoram, formulated as an 11.7% SC suspension concentrate.
Does Delegate kill sucking pests like aphids?
Delegate is highly potent against thrips and caterpillars, but it is not specifically intended for primary aphid or planthopper management.
What is the pre-harvest interval for Spinetoram in chilli?
Check the central CIBRC registered product label for official withholding periods, which typically range from 3 to 7 days depending on the crop.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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