Tamarack Pests

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Reproductive biology Brood 1 Summer re-emergence late June – mid July Brood 2 mid May – late June mid July – mid Aug. Spring emergence early May – mid June late June – early Aug. late July – late Oct. mid July – mid Aug. mid Aug. – early Oct. late Aug – next May Immature early Oct. – Dec Immature 18 Langor 1987a, b
Heavy resin flow from attacked trees Small entrance holes In July some trees start to show yellowing and browning of needles often on lower part of tree. 50% of trees being attacked show no color change during growing season but are dead next spring. Makes aerial detection of current year activity difficult. 19
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 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 26 and 27: Overwintering of ELB Confusion in t
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

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