Tamarack Pests

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Overwintering of ELB Confusion in the literature Wood, 1982 – Principal overwintering stage is the adult, also find some larvae. Werner, 1986- Overwinters as adults beneath bark Langor & Raske, 1986 – Only adults overwinter. Cold temps kill larvae & pupae. In Minnesota based on collections from above the snow line, made in late winter of 2002 – 2009 adults and larvae survive. Are warmer winters allowing more LB to overwinter resulting in increased tamarack mortality? 26
Procedure for measuring supercooling points of bark beetles LB are freeze intolerant have to super cool when temps are below freezing. Dr Rob Venette NRS, St Paul, MN Abby Walter U of MN -80.0°C 27
Page 1 and 2: Tamarack Pests • Mostly found on
Page 3: Larch sawfly Found around the world
Page 6 and 7: Stem decays Ontario 1950’s Phelli
Page 8 and 9: Fungi Isolated from Eastern Larch B
Page 10 and 11: Outbreak since 2000 Likely cause st
Page 12 and 13: Larch beetle mortality 2000 through
Page 14 and 15: August 2011 14
Page 16 and 17: Tamarack mortality due to Eastern l
Page 18 and 19: Reproductive biology Brood 1 Summer
Page 20 and 21: Black backed woodpecker 20
Page 22 and 23: What is causing the eastern larch b
Page 24 and 25: What is causing the eastern larch b
Page 28 and 29: Seasonal changes in mean supercooli
Page 30 and 31: Currently……. I still do not kno
Page 32 and 33: Research Background Only two major
Page 34 and 35: Research Studies of insect biology
Page 36 and 37: Research The influence of tamarack

Tamarack Pests

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