_Rhododendron_ponticum_-_flower_bud.jpg)
Claim · model-written summary
Disease development on Rhododendron ponticum leaf baits, measured as the proportion of symptomatic baits, differed among soils at inoculum concentrations of 1, 100 and 1000 oospores per cc soil.
- Taxon
- Rhododendron ponticum
_Rhododendron_ponticum_-_flower_bud.jpg?width=60)
Rhododendron ponticume0 - Treatment
- soile1
- Interactor
- Phytophthora kernoviae
Phytophthora kernoviaet0pathogen - Outcome
- Disease developmente1
Not reportedComparatorDirection
Verbatim
t0“Phytophthora kernoviae”
e0“baited with Rhododendron ponticum leaves”
e1“Disease development, as measured by proportion of symptomatic leaf baits, differed based on soil under inoculum concentrations of 1, 100, and 1000 oospores / cc soil ( P < 0.05)”
Title
Effect of pH on germination and infection by Phytophthora kernoviae oospores
Alina S. Puig; Stephen Dodge; Tim Widmer Journal of Plant Pathology 2025. doi:10.1007/s42161-025-02085-9
Other claims from this paper (9)
- Intervention effect Germination of P. kernoviae oospores differed by pH level.
- Intervention effect Oospore germination was lowest (20%) at pH 3.6.
- Intervention effect Oospore germination was consistently high (80.8 to 84.3%) at pH 6.8, 9.3 and 11.9.
- Intervention effect No leaf disks became infected in the acidic soil (pH 4.2) at any inoculum concentration tested.
- Observation Infection in the slightly alkaline soil (pH 7.4) ranged from 0 to 89.2% across inoculum concentrations.
- Observation Infection in the pH 5.2 soil ranged from 3.3 to 100% across inoculum concentrations.
- Intervention effect When calcium carbonate was added to the acidic soil, raising the pH to 6.1, 90% of the leaf discs became infected.
- Mechanism The authors conclude that pH alone can suppress infection.
- Mechanism The suppression of germination and infection under acidic conditions is proposed to determine which habitats the pathogen is most likely to colonize.