Reference

On the role of the hydroxyl group in the fungitoxicity of azolylalkanes

On the role of the hydroxyl group in the fungitoxicity of azolylalkanes. Gasztonyi, M.; Josepovits, G.; Vegh, A. (Plant Prot. Inst., Hung. Acad. Sci., Budapest, Hung.). Proc. - Br. Crop Prot. Conf.--Pests Dis., (3), 899-904 (English) 1984. CODEN: PBCDDQ. ISSN: 0144-1612. DOCUMENT TYPE: Journal CA Section: 5 (Agrochemical Bioregulators) Paraquat bis(Me sulfate) [2074-50-2] antagonized the fungal toxicity of triadimefon I (X = N; Y = O; Z = CO; R = 4-Cl) [43121-43-3] to some fungal species. This confirms the earlier observation on the "pro-pesticide" character of this fungicide. Metabolic redn. of the diclobutrazol I (X = N; Y = CH2; Z = CO; R = 2,4-Cl2) [75736-33-3] was very slow even in Cladosporium cucumerinum, known to reduce triadimefon extensively, and this is probably related to the greater difference between the fungitoxicity of diclobutrazol I (X = N; Y = CH2; Z = CHOH; R = 2,4-Cl2) [75736-33-3] and it oxo-analog, as compared to triadimenol I (X = N; Y = O; R = 2,4-Cl2) [55219-65-3] and its oxo-analog, triadimefon. By contrast, the imidazole analog, triadimefon, climbazole I (X = CH; Y = O; Z = CO; R = 4-Cl) [38083-17-9] was more fungitoxic than its reduced deriv. BAY 19139 I (X = CH; Y = O; Z = CHOH; R = 4-Cl) [55362-18-0]. No redn. of climbazole has been obsd. in fungi tested. The ionization of the imidazolering promotes the enolization of climbazole. It seems that the presence of an OH-group adjacent to the azole ring is important for fungitoxicity of this series of azoylalkanes; in case of triazoles a secondary alc. group, while in case of imidazoles it may be an enolic OH-group.

Fungicidal combinations

Fungicidal combinations. Hausmann, Heinz; Voege, Herbert; Haenssler, Gerd; Scheinpflug, Hans (Bayer A.-G. , Fed. Rep. Ger.). Ger. Offen. DE 3309765 A1 20 Sep 1984, 18 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: A01N031-16. APPLICATION: DE 83-3309765 18 Mar 1983. DOCUMENT TYPE: Patent CA Section: 5 (Agrochemical Bioregulators) The known fungicides 1,4-benzoquinone-1-benzoylhydrazon-4-oxime [495-73-8], 6-methyl-2-oxo-1,3-dithiolo(4,5-b)-quinoxaline [2439-01-2], N-[2,2,2-trichloro-1-(3,4-dichloroaniline)ethyl]formamide [20856-57-9], N-dichlorofluoromethanesulfenyl-N',N'-dimethyl-N-phenylsulfamide [1085-98-9], O-Et S,S-di-Ph phosphate [17109-49-8], bisphenyl(3-trifluoromethylphenyl)-1-(1,2,4-triazolyl)methane [31251-03-3], 2-(2-furanyl)-1H-benzimidazole [3878-19-1], 1-(4-chlorophenoxy)-3,3-dimethyl-1-(1H-1,2,4-triazol-1-yl)-2-butanone (I) [43121-43-3], b-[(1,1'-biphenyl)-4-yloxy]-a-(1,1-dimethylethyl)-1H-1,2,4-triazol-1-eth anol [55179-31-2], 1-(4-chlorophenoxy)-1-(1H-imidazol-1-yl)-3,3-dimethyl-2-butanone [38083-17-9], b-(4-chlorophenoxy)-a-(1,1-dimethylethyl)-1H-1,2,4-triazol-1-ethanol [55219-65-3], and N-(4-chlorobenzyl)-N-cyclopentyl-N'-phenylurea [66063-05-6] are synergized by emulsifying 125 ppm fungicide with 40-120 ppm sasame or sunflower oil, lecithin, or linoleic acid [60-33-3]. Castor, soybean, corn, cottonseed, or olive oils also may be used. Thus, spraying wheat plants inoculated with Puccinia recondita with 125 ppm I alone or plus 60 ppm sesame oil resulted in an 85 and 50% brown rust infection, resp.