Phytopathology reagents - Pentachloronitrobenzene (PCNB)
Pentachloronitrobenzene, typically abbreviated PCNB, is an antimycotic used in seed testing, specifically for the selection of Fusarium circinatum.
Pentachloronitrobenzene (PCNB) is known as a broad spectrum contact antimycotic. PCNB is a registered fungicide formally derived from nitrobenzene. It is either an off-white or yellow solid, depending on its purity, with a musty odor. PCNB has been documented to have activity against soil-borne bacteria, such as Rhizoctonia solani, Sclerotium rolfsii and Streptomyces scabies. It will also suppress the growth of actinomycetes and Rhizopus (Katan & Lockwood 1970). PCNB can be used as a seed treatment, and is noted for this use by the International Seed Testing Association (ISTA) in method 7-009: Detection of Fusarium circinatum on Pinus spp. (ISTA 2011). PCNB is used as a fungicide to suppress the growth of fungi in various crops, such as cotton, rice, and seed grains.
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