Publications by authors named "J T Dobbs"
Cercosporidium personatum (CP) causes peanut late leaf spot (LLS) disease with 70% yield losses unless controlled by fungicides. CP grows slowly in culture, exhibiting variable phenotypes. To explain those variations, we analyzed the morphology, genomes, transcriptomes and chemical composition of three morphotypes, herein called RED, TAN, and BROWN.
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- Diplodia shoot blight and canker disease (DSB) is caused by the fungal pathogen Diplodia sapinea and primarily affects 2-3 needled pines, such as ponderosa pine, resulting in various symptoms including necrotic needles, cankers, and dieback.
- The pathogen can exist without visible symptoms in trees, making it difficult to detect, and outbreaks are more common in stressed environments like nurseries and seed orchards.
- Although D. sapinea has not been previously reported in Colorado, studies confirmed its presence and pathogenicity after observing symptoms in ponderosa pines in Wyoming in 2018 and discovering symptomatic trees in Colorado in 2021.
Introduction: Soil-borne pathogens cause considerable crop losses and food insecurity in smallholder systems of sub-Saharan Africa. Soil and crop testing is critical for estimating pathogen inoculum levels and potential for disease development, understanding pathogen interactions with soil nutrient and water limitations, as well as for developing informed soil health and disease management decisions. However, formal laboratory analyses and diagnostic services for pathogens are often out of reach for smallholder farmers due to the high cost of testing and a lack of local laboratories.
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