Journal of General Plant Pathology (2021) 87, 148-153

Susumu Nagashima, Xiaodong You, Shihomi Uzuhashi and Motoaki Tojo (2021)
Stem and root rot in hydrangea caused by Pythium myriotylum and Globisporangium spp. and susceptibility of hydrangea cultivars
Journal of General Plant Pathology 87 (3), 148-153
Abstract: Severe stem and root rot was found on potted common hydrangeas (Hydrangea macrophylla) in commercial greenhouses in Shimane Prefecture, Japan. Pythium and Globisporangium spp. that were consistently isolated from the plants were identified as Pythium myriotylum, Globisporangium splendens, G. spinosum, and an undescribed species of Globisporangium based on morphological analysis and rDNA-internal transcribed spacer and cox1 gene sequences. All four species reproduced stem and root rot on inoculated potted hydrangea. Plant cultivars significantly differed in their susceptibility to the pathogens. The cultivar Mangekyo was the most susceptible to all the pathogens.
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Link to article at publishers website
Database assignments for author(s): Shihomi Uzuhashi, Motoaki Tojo

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Globisporangium spinosum	Hydrangea (crop)	Japan
	Pythium myriotylum	Hydrangea (crop)	Japan
	Globisporangium splendens	Hydrangea (crop)	Japan