Fusarium avenaceum, Haupterreger der Himbeerrutenkrankheit in Norddeutschland |
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| Authors: | Roland W S Weber Alfred-Peter Entrop |
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| Institution: | (1) Obstbau Versuchs- und Beratungszentrum (OVB) Jork, Moorende 53, 21635 Jork, Deutschland |
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| Abstract: | In 2006–2008, fungi responsible for raspberry cane blight symptoms in Northern Germany included Fusarium avenaceum, Leptosphaeria coniothyrium, Colletotrichum gloeosporioides and Botrytis cinerea (listed in order of decreasing importance). These pathogens and their symptoms are briefly described. Fusarium avenaceum has been chiefly responsible for the severe recent outbreaks of cane blight in Northern Germany, where it is ubiquitous on cultivated and wild raspberries. In 2007 infections took place during a period of wetness in mid-May and were associated with the natural formation of epidermal cracks by the expanding primocanes, but not with infestations by the gall midge (Resseliella theobaldi) which began on June 6th. In 2008, a prolonged drought throughout May and June caused a delay of F. avenaceum infections until mid-July, by which time R. theobaldi had already extensively colonised primocanes. In addition to living infected primocanes, dead above-ground cane stumps and cane fragments were the main overwintering substrates for F. avenaceum. Implications for possible crop hygiene measures against F. avenaceum are discussed. |
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| Keywords: | Schlüsselw?rter" target="_blank">Schlüsselw?rter Botrytis cinerea Colletotrichum gloeosporioides Fusarium avenaceum Leptosphaeria coniothyrium Resseliella theobaldi Gallmücke Himbeere Hygiene Rutenkrankheit |
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