Publications by authors named "James T Blodgett"
Article Synopsis
- 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.
Article Synopsis
- - Diplodia sapinea is a harmful fungal pathogen that affects various pine species globally, leading to severe damage like shoot blight and cankers, which can result in tree mortality.
- - A study in Crook County, Wyoming, found that significant numbers of ponderosa pines exhibited symptoms of Diplodia shoot blight starting in August 2018, with ground surveys confirming the presence of the fungus in May 2019.
- - Researchers confirmed and isolated D. sapinea through molecular methods, and conducted greenhouse experiments to test the aggressiveness of the fungus on potted ponderosa pine seedlings, which were wounded and inoculated with the pathogen.
Article Synopsis
- The North American variant of Heterobasidion annosum was found in Nebraska, Colorado, Arizona, and New Mexico, affecting specific tree species like Pinus ponderosa and Juniperus virginiana.
- A management approach involving substitution of tree species is suggested, given the noted differences in host range and the historical distribution of annosus root disease.
Systemic induced resistance (SIR) is a well-known host defense mechanism against pathogen attack in herbaceous plants, but SIR has only recently been documented in conifers. We tested if inoculation of Austrian pine (Pinus nigra Arnold) with Sphaeropsis sapinea (Fr.:Fr.
View Article and Find Full Text PDF