A water mould, isolated onto sterile pumpkin seeds. Genus is characterised by zoospores which encyst immediately after the release from the zoosporangium. Related to the Saprolegnia disease of fish.
On leaves of Senecio vulgaris.
The white rust, , with the orange rust, Puccinia lagenophorae, on groundsel, Senecio vulgaris.
White rust along with the orange rust, Puccinia lagenophorae, were both common on the leaves of this patch of groundsel, Senecio vulgaris.
The white Albugo tragopogonis with the orange Puccinia lagenophorae are common on this patch of groundsels (Senecio vulgaris. The plants are rapidly dying off (not coincidentally, I expect).
White smut on leaves of a groundsel, Senecio vulgaris.
white blister rust. First NZ record on this host but very common and widespread in Christchurch. First photo shows Albugo candida with the (greyer) downy mildew Hyaloperonospora lunariae, itself a new record for New Zealand (which I can't add because the NZOR lookup isn't working). The latter species seems to be consistently associated with the former across several sites in Chch.
One of two kinds of rust heavily infesting a patch of groundsel (Senecio vulgaris) in a front garden along Gerald Street.
On leaves of a solitary Senecio vulgaris growing in a crack near the Lincoln University library.
On Senecio vulgaris.
White smut on leaves of Senecio vulgaris wild in the garden outside the Geraldine museum.
Oomycota or oomycetes (oömycetes) form a distinct phylogenetic lineage of fungus-like eukaryotic microorganisms. They are filamentous, microscopic, absorptive organisms that reproduce both sexually and asexually. Oomycetes occupy both saprophytic and pathogenic lifestyles – and include some of the most notorious pathogens of plants, causing devastating diseases such as late blight of potato and sudden oak death. They are also often referred to as water molds (or water moulds), although the water-preferring nature which led to that...