Phytophthora Capsici Pathogen Management in Vegetable Crops

Phytophthora capsici is a soilborne oomycete that causes devastating root and fruit rots in a wide range of vegetable crops, notably pepper, cucumber and eggplant. Its capacity to form long-lived oospores, produce motile zoospores under wet conditions and rapidly adapt to control measures renders management particularly challenging. Integrated strategies combine cultural practices—such as water management, crop rotation and soil solarisation—with chemical control and host resistance to achieve durable suppression. Advances in pathogen and host genomics have shed light on effector repertoires and genetic loci governing resistance, while studies of fungicide sensitivity guide judicious use of protective chemistries. A concerted emphasis on marker-assisted selection, genome-driven breeding and precision agronomy underpins current efforts to mitigate losses and secure vegetable production worldwide.

Research from Nature Portfolio

Recent seminal work has delineated the genetic architecture of resistance to P. capsici root rot in pepper. By integrating traditional quantitative trait locus mapping with genome-wide association studies, researchers identified three major loci on chromosome P5 that confer broad-spectrum resistance against diverse pathogen isolates. Within these regions, clusters of nucleotide-binding site leucine-rich repeat (NBS-LRR) and receptor-like kinase genes emerged as prime candidates. A suite of single-nucleotide polymorphism markers co-localised with these loci now provides a foundation for marker-assisted breeding and genomic selection, enabling the development of cultivars with enhanced and durable root-rot resistance.

Phytophthora Capsici Pathogen Management in Vegetable Crops publication trend

The graph below shows the total number of articles in phytophthora capsici pathogen management in vegetable crops across all publications each year (not limited to Nature Index journals).

Technical terms

Oomycete: A fungal-like microbe distinguished by cell walls of cellulose and a heterotrophic lifestyle, responsible for several destructive plant diseases.

Oospore: A thick-walled sexual spore of Phytophthora that enables long-term survival in soil.

Zoospore: A motile, biflagellate spore released in water, crucial for short-range dissemination and infection.

Quantitative Trait Locus (QTL): A genomic region associated with variation in a quantitative trait, such as disease resistance.

Genome-Wide Association Study (GWAS): A population-scale analysis that correlates genetic variants with phenotypic traits to identify loci underlying complex traits.

References

1. Phytophthora capsici: Recent Progress on Fundamental Biology and Disease Management 100 Years After Its Description. Annual Review of Phytopathology (2023).
2. Identification of QTL associated with resistance to Phytophthora fruit rot in cucumber (Cucumis sativus L.). Frontiers in Plant Science (2023).
3. Insights into the genetic architecture of Phytophthora capsici root rot resistance in chile pepper (Capsicum spp.) from multi-locus genome-wide association study. BMC Plant Biology (2024).
4. Identifying candidate genes for Phytophthora capsici resistance in pepper (Capsicum annuum) via genotyping-by-sequencing-based QTL mapping and genome-wide association study. Scientific Reports (2019).