Abstract

In vitro germination of conidia of C. quinqueseptatum [Calonectria quinqueseptata] began after 4. 5 h of incubation and attained c. 95 within 8 hthe optimum temperature for the process was 25 degree C. Conidial germination on intact leaves of 2-month-old E. grandis began after 3 h of incubation. Formation of appressoria over the epidermal cells was recorded first on the abaxial surface of leaves at 6 h and later on the adaxial surface. Appressorium formation over the stomata occurred only rarely and most leaf penetrations occurred directly through epidermal cells