In previous years, at Corvallis, yields of bush snap beans
varied among planting dates. In order to obtain additional information
on the effect of planting dates on the growth, development and
yield of snap beans, four field plantings and two greenhouse plantings
of the variety O.S.U. 2051 were made.
Verticillium wilt of hops in Oregon, caused by Verticillium
dahliae Kleb., was first reported in 1956. Later, V. albo-atrum
Reinke & Berth. was also isolated from infected hop plants, and thus
both species of the fungus were shown to be the causal agents of the
disease in Oregon.
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...