Sodium polypectate (SPP) was added to an ethanol-streptomycin
agar (ESA) medium to determine if it would provide a selective
substrate for the growth of Verticillium dahliae and for isolation of
the fungus from soil and plant tissues in the presence of saprophytic
fungi. Sodium polypectate improved greatly the formation and...
Studies were conducted on inoculation of container-grown plants
with vesicular-arbuscular (VA) mycorrhizae.
Intraradical vesicles formed in colonized roots were found to
serve as propagules and significantly contribute to the infectivity
of these roots. A procedure was developed for separating
intraradical vesicles from roots; isolated intraradical vesicles were
able to colonize...
English holly culture in Oregon has been threatened by the
development of red leaf spots which prevent sale of cut holly.
Chemical, mechanical and insect injury and boron deficiency have
been shown in the past to cause different types of red leaf spotting,
but the cause of holly scab, a...