Agricultural and Forest Meteorology, 318, 2022
Highlights
Effects of warm nights on FHB were studied in cereal crops under field conditions.
Warm nights were more favourable to F. graminearum than F. poae.
Warm nights and FHB affected grain quality parameters.
Warm nights significantly increased mycotoxins (DON and 3-ADON) concentration.
Increases in night temperature can modify plant-pathogen interaction.
Abstract
The disease known as Fusarium Head Blight (FHB) is one of the most devastating cereal diseases, among which Fusarium graminearum and Fusarium poae have been isolated to be the main etiological agents in cereal crops such as barley and wheat. Currently, global climate change is one of the major concerns worldwide, and temperature is likely to be one of the most affected variables in the future. However, it is unknown how these changes will affect fungal diseases such as FHB. The present research aimed to study the F. graminearum/F. poae-barley/wheat pathosystem under future climatic conditions. The effects of the increase in night temperatures (3 °C) on disease variables, grain quality, and mycotoxin contamination were evaluated under field conditions over three years (2016, 2017, and 2018). For both crops, the results showed that warm nights favoured F. graminearum development over F. poae, reducing grain quality parameters and increasing the mycotoxin concentration significantly. The results obtained along the present work provide a better understanding of the F. graminearum/F. poae-barley/wheat pathosystem and the basis for potential future research related to climate change studies under field conditions directly impacting food quality and safety.
Keywords:
Food safety, Fusarium spp., Grain quality, Global climate change, Warm nights
Graphical abstract