The most important Phytophthora pathogens of apple are P. cactorum and P. syringae,
although other species may be locally significant. P. cactorum is widespread in the apple …

MATERIALS AND METHODS Culture of P. ultimum and preparation of sporangia. P. ultimum
isolate P4 was used throughout the study and has been described previously (33). This …

Cold‐stored plants of strawberry cultivars Tamella, Cambridge Favourite and Redgauntlet
were more susceptible to pathogenic isolates of Phytophthora cactorum than similar plants …

Percentage kill of 3-wk-old apple seedlings was significantly lower in bark compost
container medium than in a peat medium after inoculation with varying concentrations of …

Oospores of Phytophthora megasperma f. sp. medicaginis were produced on carrot broth
and purified of mycelium by digestion in Glusulase º (8-glucuronidase and arylsulfatase) …

MATERIALS AND METHODS Naturally infested field soil was collected from site II at the
Scottish Horticultural Research Institute, Mylnefield (Duncan, 1976), on 30 Oct. 1975 …

Phytophthora fruit rot, caused by Phytophthora cactorum, is an important disease of apple in
China, often causing more than 50% fruit rot in rainy years. We examined the effects of …

When oospores from the pairing between A1 and A2 mating types of Phytophthora infestans
were treated with 0.25% KMnO4 solution for 15 min and incubated at 19° C under light on a …

MATERIALS AND METHODS Most studies were carried out during 1993 and 1994 in one or
more of the five New York orchard sites described in Table 1. Samples were taken under …

High moisture content of the host tissue (88%) and low ambient rh (50‐54%) favoured
oospore formation under controlled environments. It took 14–16 days for oospores to …