Inoculation for artificial epidemics: Fresh sporidial suspension derived from Teliospores
populations obtained from each one year old sample preliminary considered an isolate, collected from various vicinities was used, and inoculum was prepared according to the method of Bonde et al.
compositarum because the size and the shape of the sori as well as characteristics of the teliospores
are similar in both species (comp.
ellipsoid, rounded at both ends, dark brown, slightly constricted at the septa, 18-21 x 26-32 um; wall 1-1.
Ustilago violacea is also capable of self-fertilization by conjugation between sporidia from the same teliospore
or between adjacent cells of the promycelium (Brefeld, 1883; Harper, 1899; P.
TELIOSPORES 2-celled abundant, sometimes 1-celled, dimorphic, ellipsoid or oblong, golden brown to blackish brown or chestnut, 20-27.
appear nearly smooth under the light microscope, but finely verrucose under the scanning electron microscope with refractive granules over the inconspicuous pores (Boerema et al.
In hermaphroditic flowers, the ovary is aborted and the anthers are filled with teliospores
rather than pollen.
The adults feed on overwintering teliospores
and germinating basidiospores of smut fungi of the genus Anthracoidea and on Carex pollen.
1-2 celled, clavate to ellipsoid, chestnut brown at the apex and cinnamon brown to paler basally, slightly constricted at the septum, two-celled teliospores
(15-) 16-20 (-22) x (27-) 30-54 (-60) um; wall 1-1.
Although available tests indicated these samples tested positive for Karnal bunt, we found no bunted--that is, blackened and foul-smelling--wheat seeds, which would indicate the presence of the disease, in any of the samples from which these teliospores
Floral infection occurs when insects that visit diseased flowers deposit fungal teliospores
on healthy plants (e.
The rust infects jewelweed in the early spring and summer, when the teliospores
produced on primary hosts (various cool-season grasses) come in contact with young jewelweed plants.