Journal of Plant Diseases and Protection (2020) 127, 463-469

Petya K. Christova (2020)
Pathogenicity of Phytophthora species to ornamental plant Plectranthus scutellarioides
Journal of Plant Diseases and Protection 127 (4), 463-469
Abstract: Pathogenicity of seven Phytophthora species (P. plurivora, P. citricola, P. lacustris, P. gonapodyides, P. chlamydospora, P. pseudocryptogea and P. hydropathica) to ornamental plant Plectranthus scutellarioides was evaluated. Susceptibility of the tested plant to the selected pathogens was analyzed by a baiting technique with detached leaves and an infection of cuttings. P. pseudocryptogea was determined as the most aggressive pathogen to the coleus plant according to the results of both methods. P. lacustris, P. gonapodyides, P. chlamydospora and P. hydropathica induced comparable disease symptoms on tested leaves as well as cuttings. P. plurivora and P. citricola demonstrated less aggressiveness to leaves of P. scutellarioides, but strongly inhibited the growth of the roots of the cuttings. All tested Phytophthora species were recognized as a real threat for coleus plants in their natural habitat, but they could also compromise its cultivation in greenhouses, nurseries and parks. In addition, the ability of the fungicide azoxystrobin for an effective control of Phytophthora species was proved.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website

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.
	Phytophthora gonapodyides	Plectranthus (crop)
	Phytophthora hydropathica	Plectranthus (crop)
	Phytophthora lacustris	Plectranthus (crop)
	Phytophthora chlamydospora	Plectranthus (crop)
	Phytophthora pseudocryptogea	Plectranthus (crop)