Investigation of Using Hyperspectral Vegetation Indices to Assess Brassica Downy Mildew.

Downy mildew caused by is a severe disease in that significantly reduces crop yield and marketability. This study aims to evaluate different vegetation indices to assess different downy mildew infection levels in the variety Mildis using hyperspectral data. Artificial inoculation using sporangia suspension was conducted to induce different levels of downy mildew disease.

A Rapid Glove-Based Inoculum Sampling Technique to Monitor in Commercial Vineyards.

Information on the presence and severity of grape powdery mildew (GPM), caused by , has long been used to guide management decisions. While recent advances in the available molecular diagnostic assays and particle samplers have made monitoring easier, there is still a need for more efficient field collection of . The use of vineyard worker gloves worn during canopy manipulation as a sampler (glove swab) of was compared with samples identified by visual assessment with subsequent molecular confirmation (leaf swabs) and airborne spore samples collected by rotating-arm impaction traps (impaction traps).

Environmental Effects on Taxonomic Turnover in Soil Fauna across Multiple Forest Ecosystems in East Asia.

The large-scale spatial variation in and causes of biotic turnover of soil fauna remain poorly understood. Analyses were conducted based on published data from 14 independent sampling sites across five forest ecosystems in East Asia. Jaccard and Sørensen's indices were used to measure turnover rates in soil fauna orders.

Identification of Putative SDHI Target Site Mutations in the SDHB, SDHC, and SDHD Subunits of the Grape Powdery Mildew Pathogen .

Succinate dehydrogenase inhibitors (SDHIs) are fungicides used in control of numerous fungal plant pathogens, including , the causal agent of grapevine powdery mildew (GPM). Here, the , , and genes of were screened for mutations that may be associated with SDHI resistance. GPM samples were collected from 2017 to 2020 from the U.

Spatiotemporal Distribution of Potato-Associated Species in Wisconsin.

Potato early blight caused by and potato brown spot caused by are two common potato foliar diseases. Fungicide applications in Wisconsin target early blight with the expectation of managing brown spot simultaneously. However, distributions of the two pathogens over time and space have not been previously reported in Wisconsin.

Distribution and Stability of Quinone Outside Inhibitor Fungicide Resistance in Populations of Potato Pathogenic spp. in Wisconsin.

Quinone outside inhibitor (QoI) fungicides have been an important class in managing potato early blight caused by and brown spot caused by . Because of the single-site mode of action character of QoI fungicides, which are relied on for management of diseases in Wisconsin, and the abundant asexual conidia production of the species, pathogen isolates with QoI resistance have been detected after just a few years of QoI fungicide usage in commercial production fields. Resistance to QoIs has been attributed to amino acid substitutions F129L and G143A in cytochrome of and , respectively, as a result of point mutations.

Aerial Concentrations of Pathogens Causing Early Blight and Brown Spot Within Susceptible Potato Fields.

Early blight caused by and brown spot caused by are two common foliar diseases of potato, with early blight typically predominating in incidence and severity. Renewed interest in these two diseases has arisen as a result of notable differences in fungicide resistance profiles of the pathogens and inconsistent outcomes of disease management tactics. The pathogens share similar disease cycles, but they differ in the shape and size of their conidia.

Diversity and Virulence of Alternaria spp. Causing Potato Early Blight and Brown Spot in Wisconsin.

Early blight, caused by Alternaria solani, along with brown spot, caused by A. alternata, have the potential to reduce quality and yield in potato production globally. Prior to this study, the incidence, disease impact, and fungicide resistance attributes of A.