72,234 articles
Fenpicoxamid
Fenpicoxamid (Inatreq active), a picolinamide fungicide derived from UK-2A of Streptomyces sp. 517-02, inhibits fungal respiration at the Qi site of cytochrome bc1 complex, controls wheat septoria and banana black sigatoka, and was EU-approved in 2018.
Fenpropathrin
Fenpropathrin (CAS 64257-84-7) is a type II synthetic pyrethroid insecticide and acaricide acting on sodium channels (IRAC Group 3A), used mainly on citrus; restricted use in the US, not approved in the EU, ADI 0–0.03 mg/kg bw.
Fenpropidin
Fenpropidin (CAS 67306-00-7) is a chiral piperidine fungicide, FRAC Group 5 amine, inhibiting sterol Δ14-reductase and Δ8→Δ7-isomerase; EU-approved for cereals since 2009, expiring 2027.
Fenpropimorph
Fenpropimorph (BAS 421F, Corbel) is a systemic morpholine fungicide, CAS 67564-91-4, introduced 1979 by BASF and Maag, inhibiting sterol Δ14-reductase and Δ8→Δ7-isomerase; a key European cereal fungicide, now banned in the EU.
Fenproporex
Fenproporex (femproporex), a racemic N-cyanoethyl amphetamine analogue anorectic developed in the 1960s, is metabolized to amphetamine, was never FDA-approved, is Schedule IV internationally, and was withdrawn in the EU and Brazil.
Fenpyrazamine
Fenpyrazamine (S-2188) is a Sumitomo Chemical pyrazolone fungicide inhibiting 3-ketoreductase in ergosterol biosynthesis, used against Botrytis gray mold; EU approval expired 15 January 2025 and GB approval expired 31 December 2025.
Fenpyroximate
Fenpyroximate (NNI 850) is a pyrazole acaricide, IRAC group 21A, that inhibits mitochondrial complex I to control mites on fruit and ornamentals; EU-approved to 15 June 2026, CAS 134098-61-6.
Fenquinotrione
Fenquinotrione (CAS 1342891-70-6, brand Effeeda) is a triketone HPPD-inhibiting herbicide from Kumiai Chemical, launched 2018 for Japanese rice paddies, controlling ALS-resistant broadleaf and sedge weeds via rice demethylation selectivity.
Fenridazon
Fenridazon (CAS 68254-10-4) is an obsolete pyridazine plant growth regulator and gametocide, used as fenridazon-potassium (HYBREX) to induce male sterility in wheat for hybrid seed; not approved in the EU.
Fenson
Fenson, aka fenizon, is the organochlorine acaricide 4-chlorophenyl benzenesulfonate (CAS 80-38-6), a GABA-channel mite killer first registered in the USA in 1958 and now obsolete, unapproved in the EU and UK.
Fenspiride
Fenspiride (Pneumorel, Eurespal) is a spiro-compound anti-inflammatory bronchodilator for cough and respiratory disease, withdrawn from the EU market in 2019 over QT prolongation and torsades de pointes risk.
Fensulfothion
Fensulfothion (Dasanit, Terracur P), CAS 115-90-2, is a highly toxic organophosphate insecticide-nematicide acting via acetylcholinesterase inhibition; first used 1957, US use cancelled 1994, now largely withdrawn.
Fentanyl
Fentanyl is a synthetic opioid 50 to 100 times more potent than morphine, used for anesthesia and severe pain and the drug most often involved in U.S. overdose deaths.
Fenthiosulf
Fenthiosulf, an insecticidal pesticide active substance (EU ID 18, no CAS number), not approved in the EU since Regulation 2076/2002; ADI 0.0003 mg/kg bw/day (JMPR 1982), default MRL 0.01 mg/kg.
Fenticonazole
Fenticonazole (Lomexin) is a topical and intravaginal imidazole antifungal, C24H20Cl2N2OS, CAS 72479-26-6, that inhibits fungal CYP51/ERG11 ergosterol synthesis and treats cutaneous dermatophytosis and vulvovaginal candidiasis.
Fentin acetate
Fentin acetate (triphenyltin acetate, TPTA, CAS 900-95-8) is an organotin fungicide, algicide, and molluscicide introduced in 1954 for potato blight and sugar beet leaf spot; banned in the EU since 2002 and no longer registered in the EU or USA.
Fentin hydroxide
Fentin hydroxide, also known as triphenyltin hydroxide (TPTH), is an organotin fungicide introduced in the 1950s that controls blight on potatoes and is now not approved in the EU.
Fenton Schaffner
Fenton Schaffner (1920–2000) was an American physician and hepatologist who founded the Division of Liver Diseases at Mount Sinai Hospital and helped establish hepatology as a discipline.
Fenton's reagent
Fenton's reagent: hydrogen peroxide plus ferrous iron (Fe2+/H2O2), discovered by H.J.H. Fenton in 1894, generating hydroxyl radicals or ferryl iron; used in advanced oxidation of wastewater, soils, and biology.
Fentrazamide
Fentrazamide (BAY-YRC-2388, Innova) is a tetrazolinone VLCFA-inhibiting rice herbicide controlling Echinochloa grasses and sedges at 200–300 g ai/ha, developed by Nihon Bayer Agrochem, registered in Japan 2000, not EU-approved.
Fenugreek
Fenugreek (Trigonella foenum-graecum), annual Fabaceae herb from the Mediterranean and western Asia, grown for bitter maple-scented seeds and kasuri methi leaves; India leads production; studied for blood sugar effects.
Fenuron
Fenuron (fenidim, PDU), 1,1-dimethyl-3-phenylurea, is an obsolete phenylurea pre-emergence herbicide introduced by Du Pont in 1957, inhibiting photosynthesis; not approved in the EU, highly water-soluble and leachable.
Feodor Lynen
Feodor Lynen (1911–1979) was a German biochemist who shared the 1964 Nobel Prize in Physiology or Medicine for research on cholesterol and fatty acid metabolism.
Feodor Vassilyev (Фёдор Васильев)
Feodor Vassilyev (Фёдор Васильев), Russian peasant of Shuya (1707–c.1782); his first wife reportedly bore 69 children in 27 confinements, a Guinness record, and he 87 total by two wives, though unverified.
Feprazone
Feprazone (4-prenyl-1,2-diphenyl-3,5-pyrazolidinedione), a phenylbutazone-related NSAID, ATC M01AX18/M02AA16, trialed in rheumatoid arthritis and osteoarthritis; withdrawn in Germany in 1984 over skin reactions and rat carcinogenicity.
FER herbarium
FER is the Index Herbariorum code for the herbarium of the Botanic Garden of the University of Ferrara, Italy, holding over 22,000 dried plant specimens, including the Campana and Felisi historic collections, in Palazzo Turchi di Bagno.
Feral
Feral describes domesticated animals or their descendants living without human care, distinct from wild and stray. Covers feralization biology and management of feral cats, pigs, and livestock in Australia and the US.
Feral cat
A feral cat, also called a free-roaming or community cat, is an unsocialized domestic cat living in the wild and surviving by hunting or scavenging.
Feral horse
Free-roaming horse descended from domesticated ancestors; called mustang in North America and brumby in Australia. Roughly 73,000 on US BLM lands and 400,000 in Australia, managed through gathers, fertility control, adoption, and culling under contested law.
Feral pig
Feral pig (wild hog, razorback), Sus scrofa, the domestic pig species living feral; invasive in the Americas and Australia, causing about $2.5 billion yearly US damage, found in at least 35 states, managed by USDA programs.