Active Molecule and Spectrum of Pest Control
Thiamethoxam (IRAC Group 4A) acts as an agonist on insect nicotinic acetylcholine receptors. By binding permanently to these receptor sites, it disrupts nervous signaling, causing rapid cessation of feeding, paralysis, and insect mortality within hours.
Its high solubility allows it to move systemically via plant vascular channels to protect newly growing vegetative leaves.
- Paddy: Brown planthopper (Nilaparvata lugens), whitebacked planthopper, and green leafhopper.
- Cotton: Jassids, aphids, and thrips.
- Vegetables: Whiteflies and aphids in tomato, brinjal, and okra.
- Vigor effect: Field studies show improved root vigor, green leaf area, and tillering following timely application.
Spray Timing and Best Application Practices
Actara should be applied as soon as scouting reveals sucking pest populations crossing economic threshold levels (ETL).
Proper water volume and sprayer calibration ensure complete canopy penetration, especially into lower rice stems where planthoppers congregate.
- Dissolve the water-dispersible granules in clean water and spray using a knapsack sprayer fitted with hollow cone nozzles.
- In paddy, direct the spray nozzle toward the base of rice hills where brown planthoppers shelter.
- Adhere to label pre-harvest intervals and avoid spraying during peak honeybee foraging hours.
Official source
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Central Insecticides Board & Registration Committee ↗Related on KisanPe
Common questions
What is the active ingredient in Syngenta Actara?
Actara contains Thiamethoxam 25% WG, a second-generation neonicotinoid systemic insecticide.
How does Actara control brown planthopper (BPH) in rice?
Its systemic xylem mobility reaches the lower stem regions where BPH feeds, halting feeding rapidly and controlling hopper populations.
Can Actara be used for soil drenching?
Yes, Thiamethoxam is readily absorbed by root systems and translocates upward to protect newly developing shoots against sucking insects.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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