Invasive Pests. EAB & More. Community Trees Program The Morton Arboretum

Transcription

1 Invasive Pests EAB & More Community Trees Program The Morton Arboretum 1

2 Invasive Pests of Concern 2

3 Impacts of Invasives 1. Public Safety Instability dead trees 2. Economic Tree removal costs Lost property value 3. Environmental Lost green benefits 4. Political Negative perceptions 3

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5 Source: hort.purdue.edu Green Ash White Ash Blue Ash Canopy Tree Maturity: ft. Very Commonly planted after Dutch Elm Disease 5

6 Compound Leaf Opposite Leaves A leaf is made up of 5-11 leaflets with a terminal leaflet 6

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9 EAB Found in Illinois Long Avenue Kane County, June 9, 20069

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11 How Does EAB Kill Trees? 11

12 EAB Larva ID Flat and slender David Cappaert 1 1 ¼ inch long fully grown Creamy white color Small brown head inserted into front of body Small pincer-like tail PA Dept of Conservation and Natural Resources 12

13 Mating Eggs Feeding May - August David Cappaert, MSU pre-pupae Emergence EAB Life Cycle 13

14 Which Trees Has EAB? Purdue University David Roberts David Cappaert,, 14

15 EAB Symptoms: Epicormic Branching MI Dept. Agr. Edward Czerinski 15

16 EAB Symptoms: Woodpecker Feeding James Smith 16

17 Early detection is very difficult! Initial symptoms may not be evident for 2-3 years Attacks along trunk and upper branches Succeeding attacks found on main trunk Trees may lose 30-50% of canopy in first few years, die within 5-7 years 17

18 Removal or Treat?! 18

19 Canopy Thinning Morton Guidance, treat a tree at 30% or less canopy thinning/dieback Do not expect grand results within the first year of treatment 19 (Smitley et al J. Econ. Entomol. 101: )

20 Consider Protecting: Significant place in your landscape? Personal value? Provides shade, water and ecosystem benefits? 20

21 Notes for Protection: Treatment options Homeowner: Merit or Xytect (Imidacloprid) - Soil drench or injection (1 yr.) Safari, Green Light or Transect (Dinotefuran) - Granular soil drench (1 yr.) Tree Professional: Tree-age (Emametin Benzoate) - Trunk injection (2-3 yrs.) Imidacloprid - Soil injection or drench (1 yr.) Dinotefuran - Soil injection or basal trunk spray (1 yr.) 21

22 Illustration from: Emerald Ash Borer: Homeowner Guide to Insecticide Selection, Use, and Environmental Protection. Minnesota Dept of Ag, DNR, University of Minnesota Extension 22

23 Asian Longhorned Beetle: History of the Invader 23

24 History ALB is a native of China, Korea and Taiwan. ALB entered the USA at shipping ports, inside infested wooden pallets and crates. 24

25 ALB Why is it a Threat? Asian Longhorned Beetle (Anoplophora glabripennis) Asian Longhorned Beetle (ALB) has the potential to cause more damage to trees than Gypsy Moth, Dutch Elm Disease, and Chestnut Blight combined. 25

26 Why Should We be Concerned? ALB has a long list of native host trees including: Maple Elm Birch Willow Horse chestnut Buckeye Ash European Mountain ash Hackberry 26

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28 ALB Damage to Trees ALB larvae feed on the living tissue under the bark before boring deep into the heartwood where they eventually pupate. Larval feeding damages the tree s circulation, disrupting the flow of water and nutrients. Larval tunneling damage and exit hole from adult ALB 28

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30 Gypsy Moth 1 st introduced in 1869 in Boston experiment gone bad Almost eradicated with DDT Most researched pest in history! Active monitoring began in st quarantine in IL in 2000 (Lake Co.) Cook, McHenry and DuPage added by 2006 Still active in detection and treatments One of the only invasives with a proven management strategy 30

31 European Gypsy Moth 250+ plant hosts Prefer oaks Immobile females 140 years to infest NE US Defoliate 4mil acres/year 31

32 Why is diversity important? Next invasive to attach? ALB? 30% of any one family 20% of any one genius 10% of any one species Sweet Gum? Source: sites.middlebury.edu 1) Look at your neighborhood. 2)What do you see? 3)Plant something different. Katsura? Source: labs.russell.wisc.edu 32

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34 The Community Trees Program Andrea Dierich Forest Pest Outreach Coordinator