The efficacy of chemical protection and its impact on the occurence of mycotoxins in wheat kernels | Účinnosť chemickej ochrany a jej vplyv na výskyt mykotoxínov v zrnách pšenice
2011
Majeská, M., Slovenská poľnohospodárska univ., Nitra (Slovak Republic). Fakulta agrobiológie a potravinových zdrojov, Katedra ochrany rastlín | Hudec, K. | Muchová, D.
The influence of six selected fungicides on the content of three mycotoxins (DON, ZEA, T-2 toxin) associated with Fusarium Head Blight (FHB) on winter wheat (cv. Mladka) was evaluated. Field experiment was conducted in 2010 on the locality of Malý Šariš. The fungicides were applied at growth stage BBCH 65. The mycotoxins level in the grains was estimated by ELISA method. The fungicides efficacy against FHB was following: prothioconazoie + fluoxastrobin (81,25%), azoxystrobin + cyproconazole (58,33%), prothioconazoie + tebuconazole (52,08%), tebuconazole (44,79%), metconazole (38,54%), prochioraz + tebuconazole (35,41%). The most effective was prothioconazoie + fluoxastrobin, the lowest efficacy was recorded by prochioraz + tebuconazole. DON-content in kernels from all variants was below the legislative limits. DON content in comparison with control variant was higher in treated variants with tebuconazole and prochioraz + tebuconazole. The lowest value of DON was observed by using of prothioconazoie + fluoxastrobin. The concentration of ZEA tended to be below the legislative limits set. The highest concentration of ZEA was recorded in the variant treated by metconazole, followed untreated - check variant. The other fungicides decreased ZEA concentration in comparison with chceck. The lowest level of ZEA was recorded in the variant treated by prothioconazoie + tebuconazole. There is currently no regulation concerning the content limit for T-2 toxin. The highest level of T-2 toxin was recorded in the variant treated by azoxystrobin + cyproconazole followed by the check - untreated variant. The lowest level of T-2 toxin was recorded in the variant treated by metconazole (1,35%).
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