Development of chestnut blight
Ursula Heiniger (Project leader)
Project aimsThe development of chestnut blight will be observed over time. Disease severity, canker incidence and the development of active and hypovirulent cankers will be monitored. C. parasitica isolates will be characterized and the effect of hypovirulent strains on canker development will be assessed. The influence of site conditions (tree age, exposition, weather conditions etc.) on canker development will be estimated and compared to long-term study sites of the Phytopathology group.
LTFER site Novaggio. All the chestnut blight cankers will be mapped and measured. C. parasitica will be isolated from selected cankers and their cultural type (white or orange, corresponding to hypovirulent or virulent forms, respectively; see Fig. 1a) and their vegetative compatibility (v-c; see Fig. 1b and 1c) group will be determined. Measurements and isolations will be repeated annually.
1996-98: Annual measurements of the cankers, isolation and characterization of C. parasitica
Bissegger M., Rigling D., Heiniger U. 1997. Population structure and disease development of Cryphonectria parasitica in European chestnut forests in the presence of natural hypovirulence. Phytopathology 87: 50-59. (abstract)
Conedera M. 1991. La situazione del cancro corticale del castagno (Cryphonectria (Endothia) parasitica (Murr.) Barr.) al Sud delle Alpi (Svizzera meridionale). Schweiz. Z. Forstwes. 142: 283-298.
Heiniger U., Bissegger M. 1994. Population structure of Cryphonectria parasitica in Swiss Chestnut stands. In: Proc. Am. Chestnut Symp. Mortgantown, V. W. 1992: 143-147.
Heiniger U., Rigling D. 1994. Biological control of chestnut blight in Europe. Ann. Rev. Phytopathology 32: 581-599.
|Projekt 6.95.944 "Entwicklung des Kastanienrindenkrebses"|
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