Overview
Dithiopyr is a pyridinecarbothioate herbicide developed for selective weed control in turfgrass and ornamental settings. As a pre-emergence herbicide, it prevents weed seed germination rather than killing established plants. The compound was first registered in the 1990s and has since become a standard tool in professional turf management. The herbicide's selective action makes it particularly valuable for maintaining high-quality turf on golf courses, sports fields, and residential lawns. Its chemical structure allows it to form a protective barrier in the soil that inhibits cell division in germinating weed seeds while being tolerated by most desirable turfgrass species.
Physical and Chemical Properties
Dithiopyr presents as light brown crystals with a melting point between 65-67°C. Its low water solubility (0.3 mg/L at 20°C) contributes to its persistence in soil, typically providing weed control for 3-4 months per application. The compound shows better solubility in organic solvents, which facilitates formulation into commercial products. The molecular structure contains both fluorine and sulfur atoms, which contribute to its herbicidal activity. The compound exhibits moderate stability under normal environmental conditions but may degrade more rapidly in alkaline soils or when exposed to intense sunlight over extended periods.
Main Applications
The primary use of dithiopyr is in professional turf management systems, particularly for controlling annual grasses like crabgrass and certain broadleaf weeds in cool-season turfgrasses. Golf course superintendents value it for maintaining weed-free putting greens and fairways without damaging bentgrass or bluegrass. In ornamental horticulture, dithiopyr is applied around trees, shrubs, and flower beds to prevent weed establishment. Some formulations are also used in residential lawn care programs, though professional applicators account for most usage due to the need for precise application timing and rates.
Safety and Storage
As with all pesticides, proper handling procedures are essential when working with dithiopyr. The compound is classified as slightly to moderately toxic and requires the use of protective gloves, eyewear, and appropriate clothing during handling and application. Inhalation of dust should be avoided. Storage recommendations include keeping the product in its original container in a cool, dry, well-ventilated area away from food, feed, and seed. The storage area should be secured to prevent access by unauthorized personnel or animals. Containers should be kept tightly closed when not in use to prevent moisture absorption and product degradation.
B2B Procurement Guide
When procuring dithiopyr commercially, buyers should first verify that the product is registered for use in their target markets. Technical grade material typically comes with certificates of analysis specifying purity (commonly 95-98%). Purchasers should request Safety Data Sheets and confirm that packaging meets transportation regulations. For large-volume buyers, purchasing from manufacturers or authorized distributors can ensure product consistency and technical support. Consider ordering well before the application season, as demand peaks in early spring for pre-emergence applications. Verify that suppliers can provide proper documentation for customs clearance if importing.
Related Manufacturers
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