Publications by authors named "N D Havis"
Disease Management in Regenerative Cropping in the Context of Climate Change and Regulatory Restrictions.
Annu Rev Phytopathol
September 2024
Article Synopsis
- Regenerative agriculture has become a popular approach among farmers aiming to tackle biodiversity loss, climate change, and food security issues.
- Despite its growing adoption, the effects of regenerative practices on crop diseases and their management have been largely overlooked by researchers.
- This review highlights the challenges and opportunities related to managing crop diseases within regenerative systems and emphasizes the importance of adapting integrated pest management strategies accordingly.
Plants have evolved a highly sophisticated immune system to resist pathogen attack comprising both preformed and inducible mechanisms. Over the last 50 years, various biological and chemical inducers have been used to artificially trigger the defense response in plants, thereby promoting an induced resistance (IR) to subsequent pathogen attack. IR has proven effective for disease control in laboratory and glasshouse conditions but has seldom equalled the level of protection offered by synthetic pesticides in the field.
View Article and Find Full Text PDFis the causal agent of Ramularia leaf spot disease (RLS) on barley and became, during the recent decades, an increasing threat for farmers across the world. Here, we analyze morphological, transcriptional, and metabolic responses of two barley cultivars having contrasting tolerance to RLS, when infected by an aggressive or mild isolate. We found that fungal biomass in leaves of the two cultivars does not correlate with their tolerance to RLS, and both cultivars displayed cell wall reinforcement at the point of contact with the fungal hyphae.
View Article and Find Full Text PDFRamularia leaf spot disease (RLS), caused by the ascomycete fungus Ramularia collo-cygni, has emerged as a major economic disease of barley. No substantial resistance has been identified, so far, among barley genotypes and, based on the epidemiology of the disease, a quantitative genetic determinacy of RLS has been suggested. The relative contributions of barley and R.
View Article and Find Full Text PDFBackground: Ramularia collo-cygni is a newly important, foliar fungal pathogen of barley that causes the disease Ramularia leaf spot. The fungus exhibits a prolonged endophytic growth stage before switching life habit to become an aggressive, necrotrophic pathogen that causes significant losses to green leaf area and hence grain yield and quality.
Results: The R.