Dual Active Chemistry and Complementary Modes of Action
Acerbo integrates two complementary single-site biochemical modes of action formulated as a high-technology suspension concentrate. Fluopyram (21.37%) is a succinate dehydrogenase inhibitor (SDHI) classified under FRAC Code 7 that blocks Complex II of the fungal mitochondrial respiratory chain, cutting off cellular energy generation.
Trifloxystrobin (21.37%) is a strobilurin fungicide (FRAC Code 11) that inhibits Complex III mitochondrial respiration, halting electron transfer and arresting fungal spore germination. This dual-site activity prevents resistance development while delivering both translaminar surface protection and acropetal xylem translocation.
- Fluopyram 21.37%: SDHI Complex II inhibitor that stops fungal respiration and spore germination.
- Trifloxystrobin 21.37%: Strobilurin Complex III QoI inhibitor with exceptional mesostemic leaf binding.
- Dual-Site Synergy: Attacks fungal energy metabolism at two distinct respiratory chain complexes.
- Translaminar Movement: Moves across leaf surfaces to protect both upper and lower leaf lamina.
Target Crops and Fungal Disease Spectrum
In paddy, Acerbo provides exceptional control against sheath blight (Rhizoctonia solani), leaf blast, and neck blast (Magnaporthe oryzae), maintaining clean tillers and ensuring fertile panicle exertion.
In high-value horticulture, it delivers outstanding efficacy against anthracnose fruit rot and powdery mildew in chilli, purple blotch in onion, and scab and powdery mildew in apples, significantly enhancing marketable fruit finish and post-harvest shelf life.
- Rice Sheath Blight & Blast: Controls sheath lesions and protects the panicle neck from blast breakage.
- Chilli Anthracnose & Dieback: Halts circular sunken lesions on ripening fruits, preventing fruit rot.
- Onion Purple Blotch: Protects foliage from purple necrotic lesions, maintaining vigorous bulb development.
- Apple Scab & Mildew: Provides preventive and early curative protection on apple foliage and fruitlets.
Application Guidelines, Spray Timing and Safety
For optimum disease management, apply Acerbo proactively at the first visible sign of disease symptoms or during weather conditions favorable to fungal development. Ensure thorough foliar coverage using calibrated knapsack sprayers fitted with hollow-cone nozzles.
To manage resistance risks associated with SDHI and strobilurin chemistries, do not exceed the recommended number of seasonal applications. Rotate with multi-site contact protectants like Mancozeb, observe CIBRC-registered pre-harvest intervals, and wear personal protective equipment.
- Preventive Spraying: Apply at early disease onset before widespread fungal sporulation occurs.
- Adequate Water Volume: Use recommended water volumes per acre for complete crop canopy wetting.
- Resistance Management: Alternate with multi-site contact fungicides (FRAC M01 or M03).
- Safety Standards: Wear protective face masks, gloves, and eye goggles during chemical handling.
Official source
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Central Insecticides Board and Registration Committee (CIBRC) ↗Related on KisanPe
Common questions
What is the chemical composition of Acerbo fungicide?
Acerbo contains Fluopyram 21.37% and Trifloxystrobin 21.37% w/w SC, combining an SDHI fungicide with a strobilurin active ingredient.
How does Acerbo's dual mode of action stop fungal infections?
Fluopyram inhibits Complex II while Trifloxystrobin inhibits Complex III in the fungal mitochondrial respiratory chain, shutting down cellular energy production and spore germination.
Which major diseases does Acerbo control in paddy and chilli?
Acerbo controls sheath blight and blast in paddy, and anthracnose fruit rot, dieback, and powdery mildew in chilli.
Where can farmers check certified application rates for Acerbo?
Approved application dosages, crop registrations, and pre-harvest intervals are detailed on the product container label 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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