Pustula helianthicola Rost & Thines, 2011

on Helianthus

Pustula helianthicola on Helianthus annuus

Helianthus annuus © Howard F. Schwartz, Colorado State University, Bugwood.org

Pustula helianthicola on Helianthus annuus

same leaf, underside

gall

hypophyllous dull white spots, pustules, even crusts, largely consisting of a mass of conidia. Embedded in the plant tissue, often near vascular bundles, lie ± light brown oospores, of which the walls exhibit an irregular reticulate structure.

host plants

Asteraceae, monofaag

Helianthus annuus.

synonyms

Until recently it was assumed that Pustula obtusata was parasitising on a large number of Asteraceae genera, sunflower included. Rost & Thines found that at least the Pustula on Helianthus is a separate species, and they do not exclude the possibility that more species will have to be split off from obtusata.

notes

A pest species in the sunflower-oil industry.

references

Beenken & Senn-Irlet (2016a), Jage, Klenke, Kruse ao (2017a), Klenke & Scholler (2015a), Kruse, Thiel, Brodtbeck ao (2017a), Lava, Heller & Spring (2013a), Rost & Thines (2011a), Thines, Zipper & Spring (2006a).

mod 28.iii.2019