Abstract
AbstractAspects of the life cycle of Gremmeniella abietina (Lagerb.) Morelet were studied from 1988 to 1990 in stands of Pinus sylvestris L., 16–32 years old, in southern Sweden, initiated in 1988 with a widespread outbreak of the disease. Pycnidia started to release conidia in late spring and apothecia began to release ascospores in summer. Latent infections could still be detected one year after their establishment by cultivation of healthy looking shoots on agar petri dishes. G. abietina appeared to have a mainly biennal life cycle, as most spores were released two years after infection of the shoot.
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