Overview
Dimethomorph is a systemic fungicide belonging to the morpholine class, widely recognized for its efficacy against oomycete pathogens. It is commonly used in large-scale agricultural applications due to its dual action as a protective and curative agent. The compound is particularly effective against downy mildew, a pervasive threat to crops like grapes, potatoes, and various vegetables. Developed in the late 20th century, dimethomorph has become a staple in integrated pest management (IPM) programs. Its ability to inhibit fungal cell wall synthesis makes it a valuable tool for farmers aiming to minimize crop losses. The chemical is typically available in bulk packaging, catering to commercial agricultural needs.
Physical and Chemical Properties
Dimethomorph appears as a white to off-white crystalline powder with a molecular weight of 387.86 g/mol. It has a melting point range of 135-138°C, indicating moderate thermal stability. The compound is slightly soluble in water but dissolves readily in organic solvents such as acetone and methanol, which facilitates its formulation into various agricultural products. Its chemical structure includes a morpholine ring, which contributes to its systemic activity. Dimethomorph is stable under normal storage conditions but may degrade when exposed to extreme pH levels or prolonged UV radiation. These properties underscore the importance of proper storage and handling to maintain efficacy.
Main Applications
Dimethomorph is primarily used to control oomycete diseases, including downy mildew in grapes and late blight in potatoes. Its systemic action allows it to be absorbed by plant tissues, providing both surface protection and internal disease suppression. This makes it a preferred choice for high-value crops where yield preservation is critical. The fungicide is often applied as a foliar spray or through irrigation systems in large-scale farming operations. It is compatible with many other agrochemicals, enabling its use in tank mixes for broader pest management. However, resistance management strategies, such as rotating with other fungicide classes, are recommended to prolong its effectiveness.
Safety and Storage
While dimethomorph is considered moderately toxic, proper safety measures are essential during handling. Workers should wear gloves, goggles, and respiratory protection to avoid skin contact or inhalation. The compound is not highly volatile, but dust generation during bulk handling should be minimized to reduce exposure risks. Storage recommendations include keeping the product in a cool, dry place, away from direct sunlight and moisture. Containers should be tightly sealed to prevent contamination and degradation. In case of spills, absorbent materials like sand or vermiculite should be used, and contaminated areas must be cleaned promptly to avoid environmental contamination.
B2B Procurement Guide
For B2B buyers, sourcing dimethomorph in bulk requires attention to purity, regulatory compliance, and supplier reliability. The reference price ranges between $20-$30 per kg, depending on quantity and supplier terms. Buyers should request certificates of analysis (CoA) to verify active ingredient content and ensure adherence to local agricultural regulations. Procurement decisions should also consider logistics, such as packaging options (e.g., 25 kg bags or custom bulk containers) and delivery timelines. Establishing long-term relationships with reputable suppliers can secure consistent quality and competitive pricing. Additionally, buyers should stay informed about regional resistance trends to optimize application strategies.
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