Awiner Biotech
1 / 3
Pyroxasulfone is a selective pre-emergence herbicide. Its mechanism of action primarily involves inhibiting weed seed germination and early seedling growth. The specific mechanisms are as follows:
Upon entering weed seeds or seedlings, Pyroxasulfone interferes with the biosynthesis of fatty acids. This disrupts the formation of cell membranes and energy reserves, thereby preventing seedlings from developing normally.
Due to a deficiency in fatty acids and other critical metabolites, cell division and elongation are inhibited; this impedes the development of weed roots and shoots, ultimately leading to seedling death.
Pyroxasulfone exhibits a certain residual activity in the soil, forming a protective barrier prior to weed seed germination that effectively prevents seeds from successfully sprouting.
In summary, Pyroxasulfone is a novel type of pre-emergence herbicide that achieves weed control by disrupting key plant metabolic pathways, thereby arresting the early growth of weeds.
Provides effective control against a wide range of annual grass weeds and select broadleaf weeds.
Exhibits excellent stability within the soil, typically providing 6–8 weeks or even longer of weed control, reducing repeated applications and labor costs.
Requires a significantly lower amount of active ingredient (tens of grams per hectare) compared to traditional herbicides, providing a competitive cost per unit area.
When applied at recommended dosages, it is safe for use on a wide variety of crops, exerts minimal impact on crop emergence, and demonstrates high selectivity.
Performs consistently across various soil types (including sandy soils, loams, etc.), is minimally affected by soil pH, and maintains stable efficacy under adequate rainfall or irrigation.
Pyroxasulfone is a selective pre-emergence herbicide widely utilized in major field crops to control both grassy and certain broadleaf weeds. It is commonly applied in maize, wheat, soybeans, and rice—particularly in dry-seeded rice cultivation systems in specific regions. Furthermore, it is used in cash crops such as cotton and canola; in certain countries, the product has also been registered for use in crops like sugarcane and sunflowers, demonstrating excellent crop safety and a prolonged residual activity.
Pyroxasulfone is highly effective against a wide range of annual grass weeds, which are its primary targets. These include species such as barnyardgrass (Echinochloa spp.), foxtail (Setaria spp.), crabgrass (Digitaria spp.), and annual bluegrass (Poa annua). It works particularly well on early germinating grasses, providing long-lasting residual control when applied as a pre-emergence herbicide.
In addition to grasses, Pyroxasulfone can also control certain small-seeded broadleaf weeds. These include pigweed (Amaranthus spp.), lambsquarters (Chenopodium spp.), and some other early-season broadleaf species. However, its activity on broadleaf weeds is generally more limited compared to grass control, so it is often used in combination with other herbicides to broaden the weed control spectrum.
Pyroxasulfone is a selective pre-emergence herbicide. It acts primarily by inhibiting fatty acid biosynthesis and cell division in target weed seedlings, forming a protective barrier in the soil to prevent successful seed germination and emergence.
Pyroxasulfone is widely registered and suitable for major field crops such as maize, wheat, soybeans, dry-seeded rice, cotton, canola, sugarcane, and sunflowers when applied at recommended rates.
It provides potent control over annual grass weeds like barnyardgrass, foxtail, crabgrass, and annual bluegrass. Additionally, it offers control over select small-seeded broadleaf weeds like pigweed and lambsquarters.
The best timing for application is post-sowing but pre-emergence (soil sealing), right before the weeds begin to emerge from the soil surface.
Under normal conditions, Pyroxasulfone exhibits high stability in the soil and provides reliable residual weed control for approximately 6 to 8 weeks or longer.
Yes, adequate soil moisture is essential for activating the active ingredient. Applying Pyroxasulfone prior to planned irrigation or anticipated rainfall ensures maximum herbicidal performance.
