Technical chemistry and mesoionic mode of action
Triflumezopyrim operates via a unique receptor binding site distinct from traditional neonicotinoids and organophosphates.
- Chemical family: Mesoionic insecticide, classified under IRAC Group 4E as a nicotinic acetylcholine receptor modulator.
- Receptor antagonist: Binds post-synaptically to block nerve transmission, causing rapid feeding cessation within one to two hours.
- Systemic root and foliar uptake: Rapidly absorbed and distributed acropetally through rice xylem to all tillers.
- Efficacy across all hopper stages: Highly toxic to nymphs and adult planthoppers, preventing population surges.
Targeted efficacy against rice planthoppers
Triflumezopyrim is engineered specifically for wetland paddy ecosystems facing devastating planthopper outbreaks.
- Brown Planthopper (Nilaparvata lugens): Prevents severe hopper burn patches and lodging in mature rice fields.
- Whitebacked Planthopper (Sogatella furcifera): Controls early tillering attacks that cause stunted growth and tillering failure.
- Suppression of viral transmission: Rapid feeding cessation prevents transmission of rice ragged stunt and grassy stunt viruses.
- High selectivity: Demonstrates a favourable safety profile toward spiders, mirid bugs, and aquatic organisms.
Application timing, single-spray strategy, and resistance management
Apply Triflumezopyrim at the early nymph emergence stage (typically 40 to 60 days after transplanting or when hoppers reach 5 to 10 per hill). Direct spray nozzles toward the lower stem base of the rice canopy. A single well-timed application provides up to 21 to 25 days of residual protection, fitting into IPM spray schedules.
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 ↗Related on KisanPe
Common questions
What is the technical chemical name of Pexalon insecticide?
The technical active ingredient is Triflumezopyrim 10% SC, a mesoionic insecticide marketed under the Pyraxalt active trademark.
How does Triflumezopyrim differ from older neonicotinoids?
Triflumezopyrim binds to a distinct sub-site on nicotinic receptors (IRAC Group 4E), making it effective against planthoppers resistant to older chemistries.
Which life stages of planthoppers does Triflumezopyrim control?
It effectively controls both nymphal instars and adult planthoppers, stopping feeding immediately upon exposure.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
More General Agriculture & Tools guides
Ask Sakhi AI in your language, check live mandi prices or plan a loan with KisanPe tools.