sdu faculty of forestry journal special edition 2009 - Orman Fakültesi

1. INTRODUCTION
Occurrence in Finland
SDÜ ORMAN FAKÜLTESİ DERGİSİ
Red band needle blight is most common in dense 5-15 years stands and infects
needles in branches mostly in 0.5m-2 m high. It can also find in the same young
pine stands, where is or has been Pine needle cast epidemic caused by
Lophodermium seditiosum. Jankowsky (2008) has also observed infections in 60-
80 years stands. In Pinus sylvestris records has made in Hungary, Poland, Zhech
Republic and Estonia, but records were rare until spring 2008 (Jankowsky, 2008)
when has happened rapid outbreak throughout Europe.
Limiting factors to occurrence?
In Finland red band needle blight is recorded first time in autumn 2007 and in
spring 2008 pycnidias and germinated conidia was found and first tree isolates
have done from Hartola, Kangasniemi and Suonenjoki and ITS sequenced. The
sequences are identical with each others to a number of M. pini sequences of the
GenBank database.
Cold tolerance test has been made in test chambers to the needles, where was
able to find fresh pycnidias: one day interval +5 o C/-5 o C, continuous -10 o C, one
day interval +5 o C /-20 o C, continuous -70 o C in one week testing time and control
samples were stored in cold room in +4 o C. No clear differences could be
observed in the germination of conidia between temperatures, which mean that
winter temperature is not a limiting factor. Humid climate favors the outbreak of
red band needle cast, but dry periods in growing season are a stress to pathogen and
the developing of the disease can discontinue.
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