Infektionsversuche mit Ascocalyx abietina und Ascocalyx laricina

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Abstract
Infection experiments with Ascocalyx abietina and A. laricina, on cembra pine, mountain pine, and larch between 1979 and 1985 gave very varying results from one year to another. Moderate to very severe disease only occurred after incubation on favourable sites in the subalpine zone. The intensity of disease may depend on local site and microclimatic conditions for infection. Successful infections occurred especially in autumn. An annual infection rate of 10 to 15 percent can endanger an afforestation: in an afforestation in Avers, 50 percent of the trees were killed in some 5 years.