Powdery Mildew Epidemiology and Management Strategies

Powdery mildew, caused by obligate fungal pathogens such as Erysiphe and Golovinomyces species, represents one of the most pervasive foliar diseases affecting a wide range of crops worldwide. Its life cycle depends on airborne conidia for rapid secondary spread and overwintering structures (chasmothecia) for primary inoculum. Epidemics are driven by host developmental stage, microclimate factors including temperature and humidity, and landscape-level inoculum reservoirs. Management strategies integrate cultural practices (crop rotation, canopy management, sanitation), host resistance breeding, predictive disease forecasting, and timely application of fungicides or biocontrol agents. Recent advances emphasise precision in spray timing, exploitation of partial ontogenic resistance, and environmentally benign inputs to balance yield protection with sustainability goals. Effective control requires a holistic understanding of pathogen biology, population dynamics and the interplay between agronomic decisions and climatic variability.

Research from Nature Portfolio

Comparative analyses of conventional and biodynamic vineyard management have revealed that vines under biodynamic regimes exhibit heightened molecular defences against abiotic and pathogen stress. These studies demonstrate greater expression of RNA-silencing and immunity-related genes, linked to elevated levels of anti-oxidative and anti-fungal secondary metabolites. Findings suggest that subtle agronomic practices can fine-tune host resistance mechanisms, offering a potential route to reduce reliance on synthetic fungicides through enhancement of intrinsic plant defences.

Powdery Mildew Epidemiology and Management Strategies publication trend

The graph below shows the total number of articles in powdery mildew epidemiology and management strategies across all publications each year (not limited to Nature Index journals).

Technical terms

Chasmothecia: Overwintering sexual fruiting bodies that release ascospores, serving as primary inoculum in spring.

Conidia: Asexual spores that disperse readily by wind, driving rapid secondary epidemics.

Ontogenic resistance: Age-related increase in host tissue resistance, influencing timing of vulnerability.

Bayesian learning network: Probabilistic model that infers causal relationships among environment, pathogen and host to forecast disease risk.

Secondary metabolites: Low-molecular-weight compounds produced by plants or microbes with roles in defence against pathogens.

References

1. Development of Partial Ontogenic Resistance to Powdery Mildew in Hop Cones and Its Management Implications. PLOS ONE (2015).
2. Responses to climatic and pathogen threats differ in biodynamic and conventional vines. Scientific Reports (2018).
3. Chitosan-Based Bioactive Formulations for the Control of Powdery Mildew in Viticulture. Agronomy (2022).
4. Efficiency of inorganic fungicides against the formation of Erysiphe necator chasmothecia in vineyards. Pest Management Science (2023).
5. Disease Risk Forecasting with Bayesian Learning Networks: Application to Grape Powdery Mildew (Erysiphe necator) in Vineyards. Agronomy (2020).