Overview
Fluopicolide is a modern systemic fungicide belonging to the pyridinylmethyl-benzamide class. Developed for agricultural use, it specifically targets oomycete pathogens like Phytophthora and Plasmopara species. The compound works by inhibiting zoospore release and mycelial growth, offering both protective and curative effects. First introduced in the early 2000s, fluopicolide has become a key tool in integrated pest management programs due to its unique mode of action (Group 43 fungicide). It's frequently formulated as suspension concentrates (SC) or mixed with other fungicides to prevent resistance development.
Physical and Chemical Properties
As a crystalline solid, fluopicolide demonstrates moderate thermal stability with a melting point around 150-152°C. Its molecular structure contains trifluoromethyl and chloro substituents that contribute to its biological activity and selective toxicity against oomycetes. The compound shows limited water solubility (approximately 2.8 mg/L at 20°C) but dissolves well in polar organic solvents. This property influences its formulation development, typically requiring surfactants or emulsifiers for effective field application. The log Pow value of 3.9 indicates moderate lipophilicity, aiding in plant tissue penetration.
Main Applications
Fluopicolide is primarily used against late blight in potatoes (Phytophthora infestans) and downy mildew in grapes (Plasmopara viticola). These diseases cause significant economic losses worldwide, making fluopicolide a valuable solution for crop protection. Secondary applications include control of vegetable diseases in tomatoes, cucurbits, and onions. The fungicide is often applied as a foliar spray at rates between 75-150 g active ingredient per hectare. Many commercial products combine fluopicolide with propamocarb or fosetyl-aluminum for enhanced efficacy and resistance management.
Safety and Storage
As a WHO Class III (slightly hazardous) compound, fluopicolide requires standard pesticide handling precautions. Operators should use chemical-resistant gloves, goggles, and respirators when mixing or applying concentrated formulations. Proper storage involves keeping containers tightly sealed in well-ventilated areas at temperatures below 30°C. Bulk quantities should be placed on pallets to prevent moisture absorption. The compound shows moderate persistence in soil (DT50 20-60 days) but undergoes rapid photodegradation in water, reducing environmental accumulation risks.
B2B Procurement Guide
Industrial buyers should prioritize suppliers with documented quality control systems and batch analysis certificates. Technical material typically comes in 25kg fiber drums or 1-ton bulk bags, with purity specifications ranging from 95-98%. Key procurement considerations include verifying the absence of impurities (maximum 0.5% for any single unknown impurity), moisture content (<0.5%), and residue on ignition (<0.1%). Many manufacturers offer sample quantities for efficacy testing before large-scale purchases. Lead times vary seasonally, with longer waits during peak agricultural periods.
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