Penoxsulam 25 g/L OD Herbicide

Product name	Penoxsulam 25 g/L OD
Active ingredient	Penoxsulam 25 g/L
Chemical group	Sulfonamide-type ALS inhibitor herbicide
Formulation type	Oil Dispersion (OD)
Main use	Selective control of annual weeds in rice paddies
Main crops	Direct-seeded and transplanted rice
Main target weeds	Barnyardgrass and other annual grasses, broadleaf weeds, some sedges
Mode of action	Inhibition of acetolactate synthase (ALS), blocking amino acid synthesis
Toxicity	Low toxicity when used as directed
Application timing	Early post-emergence of weeds, early growth stage of rice
Recommended use pattern	One application per rice season (follow local label)
Packaging options	100 mL–5 L retail/professional; larger packs on request
Shelf life	Typically 2 years in original, sealed container under recommended storage

Penoxsulam 25 g/L OD Herbicide | Selective Rice Paddy and Aquatic Weed Control

Penoxsulam is a sulfonamide-type ALS inhibitor herbicide. It is highly active at very low rates and is absorbed mainly through the leaves and shoots of young weeds. Once inside the plant, it blocks key enzymes needed for growth, so the weeds stop growing, turn pale and finally die.

With a content of 25 g/L penoxsulam in an OD (oil dispersion) formulation, this product is well-suited for:

• Direct-seeded rice fields
• Transplanted rice fields
• Paddy environments where water management is part of weed control strategy

Because of its selectivity and low use rates, Penoxsulam 25 g/L OD helps rice growers keep fields clean while protecting the crop and supporting stable yields.

Active Ingredient and OD Formulation

The active ingredient in this product is Penoxsulam 25 g/L. It belongs to the acetolactate synthase (ALS) inhibiting herbicides. This mode of action is well known and widely used in modern weed management in cereals and rice.

The formulation is OD – Oil Dispersion:

• The active ingredient is finely dispersed in an oil-based system.
• When mixed with water, it forms a stable emulsion that spreads well on weed leaves.
• The oil phase helps the herbicide stay on the leaf surface and improves penetration.
• OD formulations tolerate the presence of water in the paddy and give good results even under flooded or semi-flooded conditions.

For you as a buyer, this means a product that is:

• Easy to pour, measure and mix
• Physically stable in normal storage and transport
• Strong in performance under typical rice field conditions

Mode of Action

Penoxsulam works by inhibiting the ALS (acetolactate synthase) enzyme in sensitive plants. ALS is essential for the production of certain branched-chain amino acids that weeds need for cell division and new growth.

Once the penoxsulam herbicide is taken up by the weed:

• The weed quickly stops growing.
• New leaves remain small and pale.
• Over time, the weed becomes chlorotic (yellow) and necrotic (brown and dry).
• Finally, the weed dies and does not compete with the rice crop.

Because rice can metabolise penoxsulam differently from weeds, the product is selective: at the correct stage and rate, it controls many annual weeds without harming the rice crop when used according to the label.

This ALS mode of action makes Penoxsulam 25 g/L OD a strong option for early-season weed control and a good partner in rotation with herbicides that have different modes of action.

Target Weeds

Penoxsulam 25 g/L OD is designed for paddy rice weed control. It is especially effective on:

• Annual grasses such as barnyardgrass (Echinochloa spp.), including volunteers and weedy rice in some situations
• A range of annual broadleaf weeds common in rice fields
• Certain sedges, depending on local species and label registrations

By targeting these weeds in the early growth stages, the product helps rice plants establish quickly, close the canopy and outcompete later weed flushes.

Crops and Application Scenarios

This product is mainly used in rice paddies, including both direct-seeded and transplanted systems. It can also be positioned as a penoxsulam aquatic herbicide for weed control in water-covered areas within registered uses.

Typical scenarios include:

• Direct-seeded rice fields
  Used as a post-emergence treatment when rice and weeds have emerged and water can be managed for spray timing.
• Transplanted rice fields
  Applied a few days after transplanting, when the rice has settled and young weeds are at the right growth stage.
• Flooded or semi-flooded paddies
  The OD formulation performs well in environments where water depth and timing are key parts of the weed control strategy.

Exact crop and scenario details must follow local label approvals in each country.

Usage Guidelines

The following guidance is general and does not replace the local label. Always follow your national registration and label instructions.

• Apply Penoxsulam 25 g/L OD in early post-emergence of weeds. For transplanted rice, this is usually a few days after transplanting. For direct-seeded rice, it is when young weeds are at 2–3 leaf stage and rice is at a safe stage.
• For stem-and-leaf spray, water in the paddy is usually lowered so that two-thirds or more of the weed foliage is above the water surface. This helps the spray hit the target.
• After spraying, water is reintroduced within a certain time window and kept at a shallow depth for several days to support herbicide activity.
• Avoid covering the rice growing point (heart leaf) with deep water soon after treatment, as this may increase the risk of crop injury.
• Only one application is normally recommended per season on rice, to support resistance management and maintain selectivity.

Because this is a low-dose, high-activity herbicide, accurate measurement, good mixing and uniform application are all important. For minor rice varieties or special seed production fields, small test strips are recommended first.

Product Performance and Key Advantages

Penoxsulam 25 g/L OD offers a clear list of advantages for both growers and distributors.

From a technical perspective:

• Strong early-season weed control
  Controls many annual grasses and broadleaf weeds at an early stage, protecting rice during its most sensitive period.
• Low use rate
  The product is highly active, so only a small volume is needed per unit area. This makes handling and logistics easier and more cost-effective.
• Good crop safety
  When used at the correct rate and timing, penoxsulam shows good selectivity to rice, making it suitable for both direct-seeded and transplanted systems.
• OD formulation performance
  Sticks well to weed leaves, maintains activity under flooded conditions and provides consistent results in paddy environments.

From a business perspective:

• Clear positioning for rice markets
  Easy to explain to farmers as a “low-dose, selective rice herbicide for annual weeds,” which supports marketing and sales.
• Efficient logistics
  Low-dose product reduces storage and transport volume for distributors and wholesalers.
• High repeat value
  Good field performance encourages repeat orders from farmers, helping you build a stable rice herbicide portfolio.

Safety and Environmental Information

Penoxsulam 25 g/L OD is classified as low toxicity to humans when used correctly, but it is still a pesticide and must be handled carefully.

For operators:

• Wear long-sleeved clothing, long trousers, rubber boots, chemical-resistant gloves, eye protection and a mask when mixing and spraying.
• Avoid breathing spray mist or vapour.
• Do not eat, drink or smoke during handling or application.
• Wash hands, face and exposed skin with soap and water after work.
• Contaminated clothing should be washed before reuse.

In case of accidental exposure:

• If the product gets into the eyes, rinse immediately with clean water for at least 15 minutes and seek medical advice if irritation continues.
• If swallowed, do not induce vomiting. Rinse the mouth with water and seek medical attention with the product label.
• If the product contacts the skin, remove contaminated clothing and wash the skin thoroughly.
• There is no specific antidote; treatment is supportive according to local medical guidance.

For the environment:

• Do not apply in or near fish ponds or aquaculture areas.
• Do not wash spraying equipment in rivers, ponds or any natural water bodies.
• Do not allow drain water from treated fields to flow directly into fish or shrimp ponds.
• Do not reuse empty containers for any purpose. Containers should be rinsed and disposed of according to local regulations.

Pregnant women, nursing women and children should not handle or be exposed to the product.

Packaging, OEM and Registration Support

Penoxsulam 25 g/L OD is well suited for OEM and private-label business in rice markets.

We can offer:

• Flexible packaging sizes
  • Small packs for retail: 100 mL, 250 mL, 500 mL
  • Larger packs: 1 L, 5 L, and other sizes on request
• Container types
  • HDPE or COEX bottles
  • Strong outer cartons designed for export and warehouse handling
• Private label options
  • Your own brand name, logo and colour design
  • Multi-language labels (English, French, Spanish, Arabic, Russian and others)
  • Label texts tailored to your local registration and market positioning

For registration and market entry:

• COA, MSDS, TDS and product specifications are available.
• Samples can be supplied for local field trials and laboratory analysis.
• Support can be provided on composition details, label content and technical sections of the registration dossier.

Frequently Asked Questions (FAQ)

What is Penoxsulam 25 g/L OD?
It is a selective rice herbicide containing 25 g/L penoxsulam in an oil dispersion formulation. It is designed to control annual weeds in rice paddies at low use rates, with good crop safety when used according to the label.

How does Penoxsulam work?
Penoxsulam inhibits the ALS enzyme inside the weed. This blocks the production of important amino acids, stops cell division and growth, and finally causes the weed to die.

Is Penoxsulam safe for rice?
When used at the correct growth stage and rate, Penoxsulam 25 g/L OD is selective to rice and gives good crop safety. It is important not to flood the growing point of the rice soon after application and to follow all label instructions.

What weeds does Penoxsulam control?
It controls many annual grasses and broadleaf weeds in rice paddies, especially barnyardgrass and other common annual weeds that compete with young rice.

Is Penoxsulam an aquatic herbicide?
Penoxsulam is often used in flooded or semi-flooded rice fields, so it is sometimes described as an aquatic herbicide in this context. However, you should only use it on registered sites and according to local regulations.

Can Penoxsulam be mixed with other herbicides?
Tank mixes may be possible with other rice herbicides, depending on local practice and label recommendations. Always check compatibility, follow label guidance and test on a small area first if you are unsure.

Can Penoxsulam cause crop injury?
If water levels are not managed correctly or if very sensitive varieties are treated without prior testing, crop stress can occur. To reduce risk, follow label directions, avoid deep flooding over the rice growing point after application and test on a small area for new varieties.

Work With Us as Your Penoxsulam 25 g/L OD Supplier

If you are an importer, distributor or brand owner looking for a dependable source of Penoxsulam 25 g/L OD for rice markets, we can support you with:

• Stable product quality and strict batch control
• Flexible packaging and full OEM/private label service
• Multi-language labels and documentation for registration
• Export experience into Asia, Africa, the Middle East and other rice-growing regions

Share your target country, preferred packaging sizes and annual demand, and our team will prepare a tailored proposal to help you build or upgrade your rice herbicide portfolio.