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790 Abdel-Kader, M. I. A., Moubasher, A. H., Abdel-Mallek, A. Y.: Selective effect of the systemic fungicide Tridemorph on Egyptian soil and leaf- and root-surface fungi. Bull Fac Sci Assiut

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Bagga, P.S. 2007. Efficacy of triazole and strobilurin fungicides for controlling Fusarium head blight and brown rust of wheat in Punjab. Indian Phytopathology 60 (4

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Fusarium head blight (FHB) of cereals is one of the most important pre-harvest diseases worldwide. One possible method to reduce the intensity of FHB and mycotoxin levels is to apply fungicides to wheat at the flowering stage. This paper reports the efficacy of fungicides to control FHB and reduce the associated mycotoxin biosynthesis. In a two-year experiment eight combinations of fungicides were tested. Ear inoculation with a suspension of conidia of Fusarium culmorum representing the DON chemotype, confirmed by PCR assay, was conducted during anthesis. All fungicides significantly reduced FHB severity. The best control and the highest wheat yield were obtained after the application of spiroxamine + prothioconazole at GS 29-32, combined with prothioconazole + fluoxastrobin at GS 49-55 (yield 166.5% of the control) or tebuconazole and prothioconazole (165.8%). All the other protection programs resulted in higher yields (117.1–138.5% of the control). A clear relation was observed between the disease intensity and mycotoxin concentrations.

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Abstract  

DTA curves were run for the ethylenebisdithiocarbamate fungicides maneb, mancozeb and zineb in a nitrogen atmosphere. Zineb produces a curve quite different from the others, with weak endothermic peaks at 166°C, 252°C and 293°C. Maneb and mancozeb have a relatively strong endothermic peak at 185–190°C corresponding to carbon disulphide evolution and a weaker endothemic peak at 290°C corresponding to hydrogen sulphide evolution. Maneb samples and some mancozeb samples also had a minor endothermic peak at 235°C, but this peak was lost after solvent extraction, which proved that it was due to an impurity or impurities. Elemental sulphur was found in the extract and on mixing sulphur with mancozeb, the peak at 235°C made its appearance. There is no distinguishing feature between the DTA curves for maneb and mancozeb. The shapes of the curves are, within experimental limits, indistinguishable, which means that the temperatures and energies of decomposition are the same. The chemist is left with the question whether differences in structure between maneb and mancozeb should lead to different DTA curves.

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Veterinary and Agricultural University Yearbook, 1974, Copenhagen, pp. 108–117. Sutton, J.C., Steele, P. 1983. Effects of seed and foliar fungicides on progress of net blotch and yield in barley. Canadian Journal of

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Cereal Research Communications
Authors: Szabolcs Lechoczki-Krsjak, Beáta Tóth, Csaba Kótai, Imre Martonosi, László Farády, László Kondrák, Ágnes Szabó-Hevér, and Ákos Mesterházy

Anonymous, 2005. Commission Regulation (EC) No 856/2005 of 6 June 2005, Official Journal of European Union 7.6.2005, L 143/3 Hershman, D., Draper, M. 2004. Analysis of 2004 uniform wheat fungicide

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Kelley, K. W. (1993): Nitrogen and foliar fungicide effects on winter wheats. J. Prod. Agric. , 6 , 53–57. Kelley K. W. Nitrogen and foliar fungicide effects on winter wheats

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) Növénytermelés 1999 48 115 124 Petróczi I. M.-Ács P.-né-Kovács Zsuzsanna (1996): Triazole fungicides

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. The effect of fungicidal treatment on selected quality parameters of barley and malt. J. Agric. Food Chem. 54 :1353–1360. Hajslova J. The effect of fungicidal treatment on

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Ruske, R.E., Gooding, M.J., Dobraszczyk, B.J. 2004. Effects of triazole and strobilurin fungicide programmes, with and without late-season nitrogen fertiliser, on the baking quality of Malacca winter wheat. J. Cereal Sci. 40 :1

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