Der schwarze Schneeschimmel der Koniferen [Herpotrichia juniperi (Duby) Petrak und Herpotrichia Coulteri (Peck) Bose)

Brown felt blight on conifers [Herpotrichia juniperi (Duby) Petrak and Herpotrichia Coulteri (Peck) Bose]. Herpotrichiα Coulteri (Peck) Bose was found on Pinus montαnα Miller ssp. prostrαtα Tubeuf in various alpine regions of Eastern Switzerland at altitudes over 1900 m. Herpotrchia juniperi (Duby) Petrak, has a much greater distribution, a wider host-range, and more vigour and is thus more economically important. Severe damage, particularly on spruce may be caused in afforestations of high mountain regions (eg. in avalanche control afforestation). The brown felt blight fungus can be controlled with Zineb or Maneb. The chemicals at a concentration of 5 % (overdose-spraying) must be sprayed before the first snow-fall. A reduction of concentration reduces the effectivity.