Active Ingredients and Synergistic Modes of Action
Sumiprempt combines two complementary chemical classes with distinct biochemical actions. Pyriproxyfen (5%) is a juvenile hormone mimic belonging to the pyridine ether family (IRAC Group 7C). It acts as an insect growth regulator (IGR), sterilizing adult female eggs and blocking immature nymphs from molting into adults.
Fenpropathrin (15%) is a high-potency synthetic pyrethroid (IRAC Group 3A) that acts on insect voltage-gated sodium channels. It induces rapid continuous nerve transmission, leading to instant contact knockdown and feeding cessation. This combination attacks both immature stages and active adults simultaneously.
- Pyriproxyfen 5%: Juvenile hormone mimic that prevents egg hatching and stops nymphal metamorphosis.
- Fenpropathrin 15%: Type-I/II synthetic pyrethroid delivering instantaneous contact knockdown.
- Multi-Stage Suppression: Controls eggs, nymphs, and reproductive adults of whiteflies and bollworms.
- Emulsifiable Concentrate (EC): Formulated for high leaf adhesion, translaminar penetration, and rain-fastness.
Target Crops and Insect Pest Spectrum
Sumiprempt is formulated primarily for commercial cotton farming, where mixed pest infestations of sucking insects and bollworms often coincide during square and boll development.
It delivers exceptional control against the challenging whitefly complex (Bemisia tabaci) across all life stages, while simultaneously providing robust suppression of spotted bollworms, pink bollworms, American bollworms, and leafhoppers (jassids), protecting floral squares and preventing boll rotting.
- Whitefly Management: Provides complete life-cycle disruption, clearing adult swarms and sterilizing egg clutches.
- Bollworm Suppression: Controls early-instar caterpillars before they drill entry holes into bolls.
- Sucking Complex: Reduces feeding damage from jassids and aphids, preserving photosynthetic leaf canopy.
- Sooty Mold Prevention: Halting whitefly sap-sucking eliminates sticky honeydew and black fungal growth.
Application Guidelines and Resistance Stewardship
Apply Sumiprempt at the onset of whitefly nymphal emergence or when adult populations reach economic thresholds. Ensure uniform, complete coverage of both upper and lower leaf surfaces using calibrated knapsack sprayers fitted with hollow-cone nozzles.
To manage insect resistance, avoid making consecutive repeat sprays beyond label recommendations. Alternate with non-pyrethroid, non-IGR chemistries such as diamides or ketoenols, and strictly observe CIBRC-registered pre-harvest intervals.
- Application Timing: Spray during early morning hours when whitefly adults are resting on leaf undersides.
- Thorough Wetting: Use adequate clean water per acre to achieve full droplet penetration through the canopy.
- Resistance Rotation: Rotate with alternative modes of action within the seasonal spray calendar.
- Operator Safety: Wear protective face shields, respirators, and impermeable gloves during handling.
Official source
Check the latest rules, benefits and forms here. KisanPe is an independent platform and is not a government website.
Central Insecticides Board and Registration Committee (CIBRC) ↗Related on KisanPe
Common questions
What are the active ingredients in Sumiprempt insecticide?
Sumiprempt contains Pyriproxyfen 5% (an insect growth regulator) and Fenpropathrin 15% EC (a synthetic pyrethroid).
How does Sumiprempt manage whiteflies at all life stages?
Pyriproxyfen sterilizes female eggs and prevents nymphs from maturing, while Fenpropathrin delivers rapid contact knockdown of adult whiteflies.
Which major pests does Sumiprempt control in cotton?
It controls whiteflies, bollworms (spotted, pink, American), and jassids in cotton crops.
Where can farmers verify certified label rates for Sumiprempt?
Approved application rates, safety instructions, and pre-harvest intervals are detailed on the product container leaflet and verified on the official CIBRC portal.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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