Article Focus Summary:
IHARA introduces YAMATO SC, a pre-emergent herbicide targeting glyphosate-resistant weed species threatening Brazil’s cotton productivity. The innovation strengthens IHARA’s resistance management portfolio and supports sustainable, high-yield cultivation.
Strategic Launch: Tackling Weed Resistance in Cotton Production
As Brazil projects 3.83 million tons of cotton lint production across 2.05 million hectares in the 2025/26 season, herbicide resistance has emerged as a critical challenge. To address this, IHARA has launched YAMATO SC, a selective pre-emergent herbicide designed to control tough, resistant weeds plaguing the country’s largest cotton-producing regions.
Weed Resistance: A Mounting Threat to Brazilian Cotton
Cotton growers in Brazil—particularly in Mato Grosso, Bahia, and other major states—face escalating weed resistance challenges due to intensive farming systems and repetitive herbicide use. Widely used chemistries like glyphosate have diminished in efficacy, allowing weed species to proliferate and undermine crop development.
Key Resistant Weeds Targeted:
- Goosegrass (Eleusine indica)
- Pigweed (Amaranthus spp.)
- Sourgrass (Digitaria insularis)
- Dayflower (Commelina spp.)
- Brachiaria grass
These weeds compete for vital water, nutrients, and sunlight, significantly reducing cotton yields if not properly controlled. Additionally, some species harbor insect pests and pathogens, compounding their threat.
YAMATO SC: A Next-Generation Pre-Emergent Herbicide
YAMATO SC offers growers:
- High selectivity for cotton
- Extended residual activity
- Control efficiency up to 97% for key resistant species, as confirmed by independent research institutes
How It Works:
As a pre-emergent herbicide, YAMATO SC is applied before weed germination, forming a protective barrier in the soil. This prevents seedling emergence, reducing competition during early crop stages—critical for maximizing cotton fiber yield and quality.
Expert Insights: The Importance of Herbicide Rotation
According to Valdumiro Garcia, IHARA’s Regional Marketing Manager:
“Rotating products with different modes of action is essential in fields with repeated use of the same herbicide. It expands control, reduces the seed bank, and delays resistance development.”
This view is echoed by Iuri Cosin, IHARA’s Herbicide Products Manager:
“YAMATO SC simplifies weed control, lowers application frequency, and supports more efficient and profitable cotton farming.”
Brazil’s Growing Demand for Selective Herbicide Technologies
The Brazilian Cotton Producers Association (Abrapa) notes that weed control remains one of the top barriers to achieving full yield potential. As growers intensify efforts to boost fiber output, innovative phytosanitary inputs like YAMATO SC become essential.
Cotton farms, typically large-scale operations, need robust and selective herbicides that can:
- Cover broad weed spectrums
- Minimize resistance risks
- Reduce input frequency and cost
- Ensure crop safety and productivity
The Broader Outlook: Integrated Resistance Management
YAMATO SC’s launch highlights the importance of integrated weed management (IWM) strategies—blending chemical, mechanical, and cultural control measures—to maintain long-term productivity.
IHARA’s portfolio expansion aligns with Brazil’s shift toward:
- Sustainable chemical stewardship
- Diversified herbicide use
- Farmer support for smarter field management
As weed resistance intensifies, pre-emergent technologies like YAMATO SC are expected to play a foundational role in herbicide resistance management (HRM) programs.
