Pa. Smith et Tv. Price, PRELIMINARY-STUDY OF SEED TRANSMISSION OF DOWNY MILDEW IN SOME VEGETABLE BRASSICA CULTIVARS IN AUSTRALIA, Australasian plant pathology, 26(1), 1997, pp. 54-59
Peronospora parasitica causes large losses in the brassica vegetable s
eedling industry. Commercial brassica vegetable seed in Australia was
tested under aseptic conditions to determine whether P. parasitica is
seedborne. There was no evidence of seed infection by P. parasitica. T
his was attributed to one or more of the following possibilities - no
infection in the seeds tested, a low frequency of seed transmission th
at was undetectable in the tests used, absence of oospores due to hete
rothallism, or failure of infected seeds to produce symptoms in seedli
ngs.