Active ingredient and unique spinosyn action
Spinetoram belongs to the spinosyn chemical class (IRAC Group 5). It targets nicotinic acetylcholine receptors (nAChR) in insect nervous systems at a distinct site, causing prolonged involuntary muscle contractions, tremors, feeding paralysis, and death. It demonstrates high efficacy against pest populations resistant to older chemistries.
- Active constituent: Spinetoram 11.7% SC (suspension concentrate)
- Chemical class: Spinosyn (IRAC Group 5)
- Dual uptake: Contact and ingestion action with rapid translaminar leaf penetration
Target crops and major pest complexes
- Chili: Yellow thrips (Scirtothrips dorsalis) and invasive black thrips (Thrips parvispinus).
- Corn (maize): Fall armyworm (Spodoptera frugiperda) whorl-feeding larvae.
- Cotton: Thrips and American bollworm.
- Soybean: Semiloopers and Spodoptera litura (tobacco caterpillar).
Application technique and pollinator safety
Apply as a foliar spray when pest populations cross economic thresholds, directing fine droplets into plant canopies and whorls. Wet spray droplets are toxic to foraging honeybees; apply strictly during late evening hours when pollinators are not active. Follow CIBRC approved label dosages and pre-harvest intervals.
Official source
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Central Insecticides Board & Registration Committee ↗Related on KisanPe
Common questions
What is the active ingredient in Largo insecticide?
The active ingredient in Largo is Spinetoram 11.7% SC, a semi-synthetic spinosyn derivative.
Does Largo control fall armyworm in corn?
Yes, Largo is highly effective and registered for controlling fall armyworm larvae inside corn whorls.
Why should Largo be sprayed in the evening?
Spraying in the evening prevents honeybee toxicity, as dried chemical residues on leaves are significantly safer for pollinators.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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