Oospores of Pustula helianthicola in sunflower seeds and their role in the epidemiology of white blister rust

IMA Fungus

Table 2 Rate of infection in seedlings cultivated under controlled conditions from seeds of head-infected field samples.

Sample number	Number of seeds germinated out of 50	Rate of infection
1	36	36
2	6	17
3	36	58
4	0	n.m.
5	47	45
6	0	n.m.
7	0	n.m.
8	0	n.m.
9	50	25
10	50	37
11	40	5
12	41	0
13	40	25
14	0	n.m.
15	32	0
16	39	13
17	38	40
Control plants artificially infected with oospores	48	56
Uninoculated control plants	50	0

¹n.m.: seeds were not mature enough for germination. Rate of infection (%) was determined by counting the total number of germinated seeds versus the number of plants showing pustules.

ISSN: 2210-6359