Sugarbeet leaf spot disease (Cercospora beticola Sacc.)dagger

Area of Science:

• Plant pathology
• Agricultural science
• Mycology

Background:

• Cercospora beticola Sacc. is a globally significant pathogen causing destructive leaf spot disease in sugarbeet.
• Extensive fungicide use for control incurs costs and drives the selection of fungicide-tolerant C. beticola strains.
• Limited research exists on C. beticola virulence genetics and biochemistry compared to related Cercospora species.

Purpose of the Study:

• To review the current understanding of Cercospora leaf spot disease in sugarbeet.
• To highlight challenges in disease control, including fungicide resistance and the need for improved resistance strategies.
• To identify knowledge gaps in C. beticola virulence and host-pathogen interactions.

Main Methods:

• Literature review of Cercospora beticola Sacc. and sugarbeet leaf spot disease.
• Analysis of taxonomic, identification, host range, and control data for C. beticola.
• Synthesis of information on disease symptoms, pathogen characteristics, and management practices.

Main Results:

• C. beticola causes characteristic circular leaf spots on sugarbeet (Beta vulgaris), leading to yield and quality reduction.
• Fungicides (benzimidazoles, triazoles, strobilurins) are used for control, but fungicide tolerance in C. beticola is a growing concern.
• Quantitative genetic resistance in sugarbeet is employed but exhibits low to medium heritability, indicating a need for more robust resistance.

Conclusions:

• Effective management of Cercospora leaf spot requires integrated approaches beyond solely relying on fungicides.
• Further research into the genetics and biochemistry of C. beticola virulence is crucial for developing durable resistance.
• Understanding host-pathogen interactions can lead to novel strategies for sustainable sugarbeet production.