Some factors affecting canker formation in American beech inoculated with Nectria coccinea var. faginata

Abstract

Combinations of Neetria eoceinea var. faginata (tbe primary causal agent of beech bark disease), Fusarium oxysporum, and associated bacteria were inoeulated into Ameriean beech trees at two sites in New Hampshire. Neither F. oxysporum nor bacteria appeared to affect the size of eankers formed. Canker size was signifieantly related to bark thickness at one site when only one mating type of the pathogen was inoeulated alone.

Lesion development in stems of rough‐ and smooth‐barked Eucalyptus nitens following artificial inoculations with canker fungi

“…B OYCE (1933) found cankers on Douglas fir in northern California caused by Phomoposis lokoyae Hahn occurred on both main stems and branches with relatively smooth bark. G OTWOLS et al. (1980) reported thick‐barked trees of Fagus grandifolia Ehrh.…”

“…Historically, canker fungi have not been considered a signi®cant problem in natural eucalypt forests in Australia and are cited as opportunistic or stress-related pathogens (OLD et al 1990). However, Cryphonectria cubensis (Bruner) Hodges, a canker pathogen of eucalypts found in many parts of the world including Australia (DAVISON and COATES 1991), only became recognized as a major threat as increasingly large areas were planted with susceptible eucalypts (KRUGNER 1991;ALFENAS et al 1997).…”

Beech bark disease in North America: Over a century of research revisited

“…Despite these effects, however, N. ferrugineum may have a negligible impact on BBD development (Houston, 1994a). Additionally, the fungus Fusarium oxysporum is often isolated from Neonectria cankers on beech (Gotwols et al, 1980). Although F. oxysporum inhibits N. faginata growth in culture (Cotter, 1977), it has no effect on Neonectria canker size in the field (Gotwols et al, 1980).…”