A new method for single spore isolation and fungicide resistance monitoring of Cercospora beticola, and the first report of QoI‐resistant isolates with G143A or F129L mutations of the CbCyt b gene in China
Abstract:Cercospora leaf spot (CLS) caused by Cercospora beticola is the most destructive foliar disease of sugar beet worldwide and is mainly controlled by timely fungicide applications. Recently, CLS control by pyraclostrobin exhibited significantly reduced efficiency in some fields of the Chifeng area in Inner Mongolia Autonomous Region of China. Purification of fungi by single spore isolation is essential for the study of fungal and fungicide resistance. However, the conventional single spore isolation and fungicid… Show more
BackgroundFungicides are indispensable for high‐quality crops, but the rapid emergence and evolution of fungicide resistance have become the most important issues in modern agriculture. Hence, the sustainability and profitability of agricultural production have been challenged due to the limited number of fungicide chemical classes. Resistance to site‐specific fungicides has principally been linked to target and non‐target site mechanisms. These mechanisms change the structure or expression level, affecting fungicide efficacy and resulting in different and varying resistance levels.ResultsThis review provides background information about fungicide resistance mechanisms and their implications for developing anti‐resistance strategies in plant pathogens. Here, our purpose was to review changes at the target and non‐target sites of quinone outside inhibitor fungicides (QoIs), methyl‐benzimidazole fungicides (MBCs), demethylation inhibitor fungicides (DMIs), and succinate dehydrogenase inhibitor fungicides (SDHIs) and to evaluate if they may also be associated with a fitness cost on crop pathogen populations.ConclusionThe current knowledge suggests that understanding fungicide resistance mechanisms can facilitate resistance monitoring and assist in developing anti‐resistance strategies and new fungicide molecules to help solve this issue.This article is protected by copyright. All rights reserved.
BackgroundFungicides are indispensable for high‐quality crops, but the rapid emergence and evolution of fungicide resistance have become the most important issues in modern agriculture. Hence, the sustainability and profitability of agricultural production have been challenged due to the limited number of fungicide chemical classes. Resistance to site‐specific fungicides has principally been linked to target and non‐target site mechanisms. These mechanisms change the structure or expression level, affecting fungicide efficacy and resulting in different and varying resistance levels.ResultsThis review provides background information about fungicide resistance mechanisms and their implications for developing anti‐resistance strategies in plant pathogens. Here, our purpose was to review changes at the target and non‐target sites of quinone outside inhibitor fungicides (QoIs), methyl‐benzimidazole fungicides (MBCs), demethylation inhibitor fungicides (DMIs), and succinate dehydrogenase inhibitor fungicides (SDHIs) and to evaluate if they may also be associated with a fitness cost on crop pathogen populations.ConclusionThe current knowledge suggests that understanding fungicide resistance mechanisms can facilitate resistance monitoring and assist in developing anti‐resistance strategies and new fungicide molecules to help solve this issue.This article is protected by copyright. All rights reserved.
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