Presence of deoxynivalenol in winter wheat treated with fungicides

• Published in: Biotechnology in animal husbandry Vol. 30; no. 1; pp. 167 - 173
• Main Authors: Krnjaja, V., Levic, J., Stankovic, S., Petrovic, T., Mandic, V., Tomic, Z., Obradovic, A.
• Format: Journal Article
• Language: English
• Published: Institute for Animal Husbandry, Belgrade 2014
• Subjects: deoxynivalenol; Fusarium graminearum; Fusarium head blight; winter wheat
• ISSN: 1450-9156; 2217-7140
• DOI: 10.2298/BAH1401167K

Natural occurrence of Fusarium spp. and concentrations of mycotoxin
deoxynivalenol (DON) in the grain of the winter wheat moderately susceptible
to Fusarium head blight (FHB) has been studied. Grain samples were collected
from wheat crops intended mainly for human consumption. All wheat crops were
treated with fungicides before (a.i. flutriafol - formulated as Fluoco,
applied in dose of 0.5 l ha-1) and during the flowering phase of growing
(a.i. thiophanate-methyl + epoxiconazole formulated as Eskorta plus and a.i.
thiophanate-methyl formulated as Funomil, applied in doses of 0.75 and 0.5 l
ha-1, respectivily). Among of Fusarium species only F. graminearum, as a well
known producer of DON, was identified. This fungus was identified in 15 of 19
samples (78.9%) with incidence in positive samples of 2 to 28% (average,
14.0%). Presence of DON was established in 13 of a total 19 investigated
wheat grain samples (68.4%). In positive samples DON was detected in
concentrations from 69 to 918 ?g kg-1 (average, 478 ?g kg-1). DON showed a
significant and positive correlation at P?0.05 with grain moisture content (r
= 0.52*). Between the frequency of F. graminearum and concentration of DON and
between the frequency of F. graminearum and grain moisture content, positive
correlation was determined, but without statistical significance (r = 0.44
and r = 0.29, respectively).