Sumoflex - Fomesafen 11.1% w/w + Fluazifop-P-butyl 11.1% w/w SL - Syngenta
Sumoflex Herbicide | Fomesafen 11.1% + Fluazifop-P-Butyl 11.1% SL
A selective, early post-emergence herbicide for the listed weeds in soybean and groundnut, applied once at the 2–5-leaf weed stage.
What it controls: The crop-specific grasses and broad-leaved weeds below; groundnut also includes listed Cyperus sedges.
When to use it: Once after sowing, when weeds have 2–5 leaves, are actively growing and soil moisture is suitable.
What to include: Accurate area measurement, 500 L water/ha and a calibrated knapsack sprayer with a flat-fan nozzle.
Why Choose This Product? Key Benefits
- 🌿Grass and broad-leaved weed coverage: The premix covers the listed weeds from more than one weed group. Match the weed list to the crop rather than treating it as a claim to control every weed in the field.
- 🌱Selective use in two crops: Sumoflex has specific early post-emergence recommendations in soybean and groundnut. Crop selection and weed stage remain part of the treatment, not optional details.
- 🎯Two different herbicide targets: Fomesafen and fluazifop-P-butyl act through different pathways: PPO inhibition and ACCase inhibition. This combines distinct types of herbicide activity in one formulation.
- ⏱️A clear early-treatment window: A 2–5-leaf weed-stage window gives a practical field check before application. Young, actively growing weeds should not be confused with large, established escapes.
- 💧One formulated premix: Both active ingredients are already combined in the SL formulation. Do not add a second herbicide simply to recreate the premix or assume an extra product is required.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand Name | Manufactured by Syngenta India Private Limited; marketed by Mahindra Summit Agriscience Limited. |
| Technical Name | Fomesafen 11.1% w/w + Fluazifop-P-Butyl 11.1% w/w SL. |
| HRAC MoA Code | Fomesafen: Group 14; Fluazifop-P-butyl: Group 1. |
| Chemical Group | Fomesafen: diphenyl ether; Fluazifop-P-butyl: aryloxyphenoxypropionate (FOP). |
| Formulation | SL — soluble concentrate; selective early post-emergence herbicide. |
| Toxicity Label | Danger; moderately toxic. Avoid spray drift, water contamination and use near aquaculture. |
How It Works: Mode of Action
The two active ingredients act on different weed processes. The spray must reach emerged weed foliage; this is not a bare-soil, pre-emergence programme.
- Spray contacts emerged weeds: Apply enough water for thorough coverage of the target leaves. Field calibration and a suitable flat-fan spray pattern help the treatment reach weeds evenly.
- Fomesafen disrupts PPO activity: Fomesafen inhibits protoporphyrinogen oxidase, disrupting a pathway associated with chlorophyll production and damaging susceptible weed cells. It contributes activity against the listed broad-leaved weeds.
- Fluazifop-P-butyl interrupts grass growth: Fluazifop-P-butyl inhibits ACCase, affecting fatty-acid production needed by growing cells in susceptible grasses. Grass growth can stop before complete visible browning, so immediate colour alone is not a reliable reason to respray.
Fomesafen is HRAC 14 (legacy E), and fluazifop-P-butyl is HRAC 1 (legacy A). Repeated reliance on the same modes can select resistance. Use crop rotation, field hygiene and suitable non-chemical measures, and plan later seasons with locally advised alternatives.
Target Crops & Pests
Weed species differ between the two crop recommendations. Common English names help identification; the botanical names retain the exact target identity.
| Crop | Target Pest(s) |
|---|---|
| Soybean |
Grass weeds
Broad-leaved weeds
|
| Groundnut |
Grass weeds
Broad-leaved weeds
Sedges
|
A genus-level entry such as Digitaria spp., Trianthema spp. or Cyperus spp. is not a named recommendation for every species. Do not move the groundnut sedge claim into soybean or substitute a different grass merely because it looks similar.
Dosage & Application Guide
Use the crop-specific programme below as one foliar application after sowing. Acre figures are approximate conversions; retain the original hectare rate when calibrating equipment.
Dosage per Acre, Litre, & Pre-Harvest Interval (PHI)
| Crop | Dose (ml / Acre) | Water (L / Acre) | Dose (ml / Litre) | PHI (Days) |
|---|---|---|---|---|
| Soybean | Approx. 405 ml Original: 1,000 ml/ha |
Approx. 202 L Original: 500 L/ha |
See note* | 71 days |
| Groundnut | Approx. 405 ml Original: 1,000 ml/ha |
Approx. 202 L Original: 500 L/ha |
See note* | 82 days |
Apply once at the 2–5-leaf stage of weeds, under optimum soil-moisture conditions while weeds are actively growing. Use a knapsack sprayer fitted with a flat-fan nozzle.
*Per-litre dose: the recommendation is expressed as product and water per hectare. No independent universal per-litre or tank recipe is supplied here; calibrate the sprayer to deliver the specified quantities to the intended area.
Acre conversions use 0.40468564224: 1,000 ml/ha becomes 404.6856 ml/acre and 500 L/ha becomes 202.3428 L/acre. PHI is the minimum interval from the last application to harvest, not the weed-control response time.
How to Apply: Best Practices
- Identify the crop and weed mix: Walk the field before spraying. Check both the crop’s target list and the weeds’ leaf stage; the groundnut and soybean lists are not identical.
- Check active weed growth: Use the early post-emergence window when weeds have 2–5 leaves and soil moisture is suitable. Do not force the treatment onto older weeds or invent a higher dose for poor growing conditions.
- Measure and calibrate: Use 1,000 ml product and 500 L water per hectare. Sprayer output, walking speed and the area being treated must agree so that a small tank is not unintentionally spread over too much land.
- Prepare the spray safely: Follow pack mixing directions using dedicated measuring equipment. Do not use cooking utensils, stir with bare hands or add unapproved fertilisers, pesticides or adjuvants.
- Use the correct nozzle: Fit the knapsack sprayer with a flat-fan nozzle and direct an even spray onto weed foliage. Thorough weed coverage is the objective, not simply wetting the bare soil between rows.
- Avoid drift and overlap: Keep spray off neighbouring crops and non-target plants. Avoid double-treating turns or overlapping passes, and prevent contamination of drains, ponds or aquaculture areas.
- Record and inspect: Record the treatment date and respect the crop-specific harvest interval. Inspect results and manage any escapes with appropriate advice; the leaflet specifies one application rather than an automatic repeat-spray programme.
Frequently Asked Questions
1. Can Sumoflex be used before weeds emerge?This is an early post-emergence recommendation for emerged weeds at the 2–5-leaf stage. Do not replace that programme with a pre-emergence soil treatment or copy timing from a different herbicide.
2. Are the soybean and groundnut weed lists interchangeable?No. Groundnut includes additional targets, including Cyperus sedges, while soybean has its own list. Check the weeds listed under your crop before treatment, rather than assuming all weeds mentioned anywhere on the page are covered.
3. Why are water volume and nozzle choice important?The treatment is directed at weed foliage, so even coverage matters. Use the specified 500 L water/ha and a flat-fan nozzle with calibrated output; reducing water without checking coverage and area can change the field dose.
4. Can I apply a second spray if some weeds remain?The programme here is a single application. Do not automatically repeat it or increase the dose for escapes; check weed identity, growth stage, coverage and possible resistance with a suitable local adviser.
5. Is the waiting period the same for both crops?No. Allow 71 days in soybean and 82 days in groundnut from the last application to harvest. These are harvest intervals, not instructions to repeat treatment after that many days.
Safety & Disclaimer
Wear the protective clothing, gloves, eye protection, mask and boots required by the pack. Avoid skin and eye contact and breathing spray. Do not eat, drink or smoke while handling; wash thoroughly and change contaminated clothes afterwards.
Keep spray off non-target crops and plants. Avoid contamination of air and water, and do not use near aquaculture. Prevent leftover mixture and sprayer washings from entering drains, streams or ponds.
Store in the original closed container in a locked, dry, ventilated place separate from food and feed. Keep children and animals away. Do not reuse empty containers; follow the label and local waste-disposal rules.
If exposure or illness occurs, seek medical attention promptly and take the product pack or label. Use only according to the current Indian Sumoflex directions, including crop, weed list, stage, single-application limit, dose, water and PHI.