Fusarium head blight in winter wheat: development peculiarities and protective strategies
Laen...
Kuupäev
2024
Kättesaadav alates
Autorid
Avagyan, G.V.
Martirosyan, H.S.
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Estonian University of Life Sciences
Abstrakt
Fusarium head blight (FHB, caused by the fungal plant pathogen Fusarium
graminearum Schwabe) is a widespread fungal disease in the Republic of Armenia, affecting
various cereal crops, including wheat, leading to a decrease in productivity and grain quality.
However, comprehensive research aimed at selecting proper fungicides and determining the
optimal application timing has not been conducted before.
FHB can undergo epidemic development during years characterized by favorable weather
conditions. Conversely, during periods of adverse weather conditions, the severity and incidence
of FHB tend to decrease notably. Abundant rainfall and mild temperatures render plants more
susceptible, facilitating the spread of infection not only during the flowering of winter wheat but
also at the waxy ripening stage, thereby increasing the risk of an FHB epidemic.
The experiments were carried out during the 2022 and 2023 growing seasons under rain-fed
conditions, with the primary focus on treating winter wheat with triazole group fungicides.
During years with adverse weather conditions for FHB development, a single application of
Falcon (0.5 L ha-1
) or Prosaro (1.0 L ha-1
) at Feekes 10.5.1 proved to be an effective strategy for
managing FHB, particularly when integrated with cultural practices. These treatments provided
a biological efficacy of 80.6% to 83.3% at Feeks 11.2, and from 76.6% to 79.4% at harvest,
respectively, increasing wheat yield by 37.62% to 42.9%.
In the case of epidemic development of FHB during years with more favorable weather
conditions, a double fungicide treatment (Falcon or at Feekes 10.3 and Prosaro at Feekes 10.5.1)
was the most effective option, showing high biological efficacy (97.4% at Feeks 11.2 and 90.3%
at harvest) against FHB of winter wheat, increasing wheat yield by 40.1%.
Kirjeldus
Received: February 24th, 2024 ; Accepted: April 25th, 2024 ; Published: May 2nd, 2024 ; Correspondence: gayaneavagyan@yahoo.com
Märksõnad
Fusarium head blight, winter wheat, triazole fungicides, biological efficacy, articles