Chemical class and unique mode of action
- Active ingredient: Spiromesifen 22.9% SC (suspension concentrate).
- Chemical family: Keto-enols / Tetronic acid derivatives (IRAC Group 23).
- Mode of action: Inhibits the acetyl-CoA carboxylase (ACCase) enzyme, halting lipid and fatty acid biosynthesis in target pests.
- Juvenile stage specialist: Highly lethal to juvenile nymphal stages and eggs of whiteflies and mites, while causing female adult sterilization.
Target pests and registered crop applications
- Whiteflies (Bemisia tabaci): Provides long-lasting nymphal control and prevents sooty mould development caused by honeydew secretion.
- Mites: Broad mites and two-spotted red spider mites causing leaf curling and bronzing.
- Registered crops: Cotton, chilli, brinjal, tomato, and tea plantations.
- Translaminar movement: Penetrates treated leaves to control pests sheltering on the lower foliar surfaces.
Application timing and resistance management
Apply at early pest buildup when whitefly nymphs and mite colonies first appear on the undersides of leaves. Use hollow-cone nozzles with adequate water volume to ensure thorough underside leaf coverage. Because of its specialized mode of action, Oberon is an ideal rotation partner in insecticide resistance management programs against pyrethroid-resistant whitefly populations.
Official source
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Central Insecticides Board & Registration Committee (CIB&RC) ↗Related on KisanPe
Common questions
What is the active ingredient in Bayer Oberon?
Oberon contains Spiromesifen at 22.9% w/w formulated as a suspension concentrate (SC).
Which pests are controlled by Oberon insecticide?
It specifically controls whiteflies (nymphs and eggs) and various species of plant-feeding spider mites.
Does Oberon kill adult whiteflies directly?
Oberon primarily targets eggs and nymphal stages; while it does not cause immediate adult knockdown, it causes adult female sterilization, preventing further reproduction.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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