When it comes to fighting fungal diseases in crops, there are many options available. But not all of them work the same. Some fail when disease pressure increases. Others need multiple sprays. And some are too slow to act. That’s where Azoxystrobin 11% + Tebuconazole 18.3% SC comes in.
There are two actives in this Fungicide that work differently, but together they offer solid protection. The result? Better control, longer duration, and safer crops. Let’s break it down in a simple way.
What is Azoxystrobin?
Azoxystrobin is from the strobilurin group of Fungicides. Its main job is to block germination of spores and to stop fungus from spreading further. It has a wide range of activity and is known for its preventive action. When applied at the early signs of infection or just before, it builds a protective layer on the leaf surface. The fungus fails to grow.
Azoxystrobin is also systemic in nature. That means it can travel inside the plant tissues and protect even the newer leaves that emerge after application. This translaminar movement makes it useful for controlling hidden infections.
What is Tebuconazole?
Tebuconazole is from the triazole class. Unlike Azoxystrobin, which prevents fungal growth on the outside, Tebuconazole works inside the plant. It stops the fungus from multiplying by blocking ergosterol synthesis.
So when Azoxystrobin and Tebuconazole are mixed in one formulation, you get both types of action, that is, protective and curative. That’s why this combination is a favourite for crops where disease pressure is uncertain or fluctuating.
Mode of action of Azoxystrobin 11% + Tebuconazole 18.3% SC: What Happens Inside the Plant and the Pathogen
Let’s talk a little deeper about what these two molecules actually do once they are applied to the crop.
Azoxystrobin
Azoxystrobin belongs to a group of fungicides called QoI, which stands for Quinone outside Inhibitors. It targets mitochondria and blocks a protein called the cytochrome bc1 complex. It is a very important protein for the electron transport chain. When Azoxystrobin binds to this cytochrome bc1 complex at the Qo site, the fungus can’t produce energy and stops growing and eventually dies.
Without energy, the fungus can’t grow and germinate and can’t infect either. That’s why Azoxystrobin is very effective in early-stage disease prevention. It literally stops the fungus from getting started.
Also, because it has translaminar movement (moves across the leaf surface) and systemic activity (moves through xylem vessels), it can protect both sprayed and unsprayed parts of the plant, especially new growth after application.
Tebuconazole
Tebuconazole works completely differently. It belongs to the Demethylation Inhibitors (DMIs), a subgroup of triazoles. These fungicides block the enzyme C14-demethylase, which is part of the pathway fungi use to produce ergosterol.
Ergosterol is like cholesterol for fungi. It helps build and maintain fungal cell membranes. Without ergosterol, the fungal cells become weak and leaky and die off. This makes Tebuconazole highly curative. It stops an active infection by hitting the fungus where it’s most vulnerable.
And because Tebuconazole is also systemic, it travels inside the plant to reach the infected tissues that may not be visible yet.
Where it works best
This formulation is widely used in Paddy, Wheat, Grapes, Chilli, Tomato, Groundnut, and Soybean. It controls major diseases like sheath blight, rust, leaf spot, powdery mildew, and anthracnose. Because both actives are systemic, the coverage is thorough, and even the hard-to-reach inner canopy gets protected.
Benefits of using Azoxystrobin 11% + Tebuconazole 18.3% SC
- One-shot protection against a wide range of fungal infections
- Preventive and curative in the same bottle
- Reduces need for frequent spraying
- Systemic and translaminar action
- Helps in keeping leaves green and photosynthetically active
- Improves overall plant health and yield
Other Azoxystrobin formulations you should know
If your target crop or disease profile is different, Peptech Biosciences also has
other formulations made with Azoxystrobin as the core molecule. Here’s a table to help you pick the right fit:
| Formulation | Partner molecule | Type | Suitable Crops | Key Diseases Controlled |
| Azoxystrobin 23% SC | None | Solo | Grapes, Paddy, Chilli | Anthracnose, Blights, Downy mildew |
| Azoxystrobin 18.2% + Difenoconazole 11.4% SC | Difenoconazole | Combination | Vegetables, Fruits, Oilseeds | Alternaria, Powdery mildew, Early blight |
| Azoxystrobin 8.3% + Mancozeb 66.7% WG | Mancozeb | Contact + Systemic | Paddy, Potato, Vegetables | Leaf spot, Late blight, Sheath blight |
| Azoxystrobin 16.7% + Tricyclazole 33.3% SC | Tricyclazole | Dual Systemic | Paddy | Blast, Sheath blight, Dirty panicle disease |
Each product is designed with a purpose. For instance, if you are targeting blast in paddy, the Tricyclazole combo would be better. If you want a broader curative punch in vegetables, go with the Difenoconazole version. If you want an economic contact plus systemic fungicide, Mancozeb combo can do the job.
How to use Azoxystrobin 11% + Tebuconazole 18.3% SC
It is recommended to apply Azoxystrobin 11% + Tebuconazole 18.3% SC at the early stages of disease occurrence. Growers must avoid waiting till the damage becomes visible across the field. The recommended dose is 1 ml per liter of water, and the canopy must be covered thoroughly for best results. Always check for crop-specific guidelines.
Rotation is also important. Ask growers not to stick with the same mode of action throughout the season. Suggest they use other classes of Fungicides between applications to avoid resistance buildup.
Final Thoughts
Azoxystrobin 11% + Tebuconazole 18.3% SC has become one of the most reliable fungicidal actives in Indian agriculture. Azoxystrobin in combination with Tebuconazole, gives excellent disease protection, helps growers reduce crop losses, and supports healthier yields.
Whether any grower is dealing with paddy sheath blight or rust in soybean or mildew in grapes, there is an Azoxystrobin formulation that fits the crop need.
Our lineup covers solo and combo options so you can pick what works best for your farming partners. If you are a brand looking for white-label supply or bulk packaging, we offer that with complete backend support.
It’s not just about selling a fungicide. It’s about ensuring that the formulation is consistent, well-tested, and delivered with reliability. That’s what helps your brand grow with confidence.
