Caring for Your Land Series of Workshops 1 Invasive Species Insects and Diseases Module 3.

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Presentation transcript:

Caring for Your Land Series of Workshops 1 Invasive Species Insects and Diseases Module 3

2 Asian Longhorn Beetle (Anoplophora glabripennis)

Module 3 3  Over 100 introduced species of insects in North America Statistics

Module 3 4 Identification  Body mm long, 7-12 mm wide  Shiny black with up to 20 white dots arranged in parallel lines  Antennae longer than body  Legs black, tinged with a whitish-blue colour

Module 3 5 Identification  Adult exit holes  ‘dime’ sized

Module 3 6 Identification  Large larvae

Module 3 7 Characteristics  Adults feed on leaves and bark of fine branches  Female chews laying pit in bark which may leak frothy sap  Young larvae feed on green inner bark for 8 to 10 months

Module 3 8 Similar Species White-spotted sawyer Asian longhorn beetle

Module 3 9 Impacts

Module 3 10 Beech Bark Disease (Nectria coccinea var. faginata)

Module 3 11 Identification  Beech scale insects are:  Yellow soft- bodied insects  Adults 0.5-1mm long  The insects secrete a wooly white wax

Module 3 12 Identification  Fruiting bodies

Module 3 13 Characteristics  Infected and dying beech trees show signs of stress

Module 3 14 Impacts  beech scale insects weaken trees  mortality does not occur until Nectria invades tree  mortality 3-6 years after scale infestation  in Pennsylvania the first wave of disease:  killed 50% of Be >25 cm dbh  25 % lived but were infected by Nectria  25% showed some resistance

Module 3 15 Management Methods  There are no controls for Beech Bark Disease  Stands with a high % of Be are highly vulnerable  Manage for beech bark disease only if there is disease  Beech trees can be infected by beech scale but not by the exotic Nectria canker

Module 3 16  prioritize trees for salvage -mark trees heavily infested with scale -Mark overmature trees, and trees with evidence of decay, broken tops or other wounds -retain some trees for habitat -this will not effect the spread or impact of the disease  don’t transport infected firewood or logs to unaffected areas Management Methods

Module 3 17 Brown Spruce Longhorn Beetle (Tetropium fuscum)

Module 3 18 Location

Module 3 19 Characteristics

Module 3 20 Oak Wilt (Ceratocystis fagacearum )

Module 3 21 Oak Wilt

Module 3 22 Oak Wilt

Module 3 23 Oak Wilt

Module 3 24 Butternut Canker (Sirococcus clavigignenti juglandacearum)

Module 3 25 Range Map

Module 3 26 Identification  Young, annual cankers are elongated, sunken areas commonly originating at leaf scars and buds

Module 3 27 Identification  Peeling the bark away reveals the brown to black elliptical areas of killed cambium

Module 3 28 Identification  Older, perennial branch and stem cankers are often found in bark fissures or covered by bark  Can be bordered by successive callus layers

Module 3 29 Characteristics  Cankers develop anywhere on a tree, but are most common on the main stem, at the base of trees and on exposed roots.  Butternut is the only known natural host killed by the fungus.  The fungus can survive on dead trees for at least 2 years.

Module 3 30 Impacts  80% decline of Bn in some states  Harvesting has accelerated in Ontario  Butternut is an important mast species  there are no known controls

Module 3 31 Management Methods Preserve trees which show some signs of resistance  mark and retain trees with >70% live crown and < 20% circumference of stem infected by canker

Module 3 32 Chestnut Blight (Cryphonectria parasitica)

Module 3 33 Characteristics  fungal spores enter through cracks or wounds in the bark  the fungus forms sunken cankers which girdle the tree  tree dies above the canker  infected trees often resprout only to go through it all again

Module 3 34 Impacts  once extremely common  chestnut is now all but eliminated  In the first 40 years of the 20th century, blight destroyed 3.5 billion American chestnuts.

Module 3 35 Dutch Elm Disease (Ophistoma ulmi)

Module 3 36 Identification  branches and stems infected by DED fungus show dark streaks of discoloration  cut through a dying branch to expose outer rings of wood

Module 3 37 Identification  wilting of leaves  leaves yellow and brown

Module 3 38 Identification Spread by bark beetles Native (smaller) and European (larger) Elm bark beetles European

Module 3 39

Module 3 40 Economic Impact  Elm was widely planted as a street tree in towns and cities  Millions have been spent removing dead Elm and treating infected Elm

Module 3 41 Emerald Ash Borer (Agrilus planipennis)

Module 3 42 Emerald Ash Borer Still unsure of life cycle in NA Can kill an ash tree in 1 year

Module 3 43 Emerald Ash Borer Larvae girdle tree Trees often resprout below girdled area

Module 3 44 Emerald Ash Borer Wood quarantines in place Aggressive control measures

Module 3 45 Gypsy Moth (Lymantria dispar)

Module 3 46 Introduction How it came to Ontario: -the adult moths can travel 5-15 miles per year -egg cases are often transported by cars and campers far greater distances -larvae climb trees and are carried by wind considerable distances Ballooning

Module 3 47 Identification

Module 3 48 Calendar of gypsy moth activity

Module 3 49 Characteristics Preferred food includes:  Oak, Apple, Birch, Manitoba Maple, Hawthorn, Basswood, Poplar and Willow  will eat just about any plant material including pines, grass and vegetables

Module 3 50 Impacts  defoliation is a stress to a tree  defoliation drastically changes the forest habitat  less shade, drier conditions  defoliation of weak trees or repeated defoliation may remove Oak from some stands  Oak may be weakened and not produce as much mast for wildlife

Module 3 51 Economic Impact  millions of dollars have been spent protecting trees from the gypsy moth infestation of the late 80’s-early 90’s

Module 3 52 Control Methods  destroy egg masses on site  biological and chemical exist  trap larvae on trunk  clean campers and boats

Module 3 53 Control Methods Try to ride out the infestation  Infestations last a few years  Population grows until a virus knocks them down

Module 3 54 Pine Shoot Beetle (Tomicus piniperda)

Module 3 55 Origin and Introduction  Origin: major pest of pines in Europe and Asia. first discovered in the U.S. on a Christmas tree farm in Ohio probably introduced by foreign ships carrying beetle infested wood  How it came to Ontario: -spread through the movement of Christmas trees or pine logs or nursery stock -beetles also naturally disperse in the wind

Module 3 56 Origin and Introduction

Module 3 57 Identification  adults:  3-5 mm long- size of a match head  brown or black  cylindrical shape

Module 3 58 Identification  Best to look for damage

Module 3 59 Characteristics  complete one life cycle per year  overwinter inside the thick bark of living pine trees  adults emerge in spring, mate and lay eggs in :  dead/dying/stressed pine trees  recently cut trees and stumps  logs  bark mulch

Module 3 60 Characteristics  larvae feed and mature under the pine bark  emerge as adults in July  adults feed on new and 1 year old pine shoots  affected shoots drop, turn yellow  preferred species is Scot’s Pine, but the beetle will also feed on other pines, spruce, larch and fir

Module 3 61 Impacts  shoot feeding:  stunts height and diameter growth of trees  can cause poor form  infested trees are weakened, and the beetle may even attack the trunk of the tree and lay eggs there

Module 3 62 Economic Impact  the beetle is the leading pest of pine trees in Europe  infestations have lead to quarantines and restricted movements of Christmas trees  all pine trees and wood products are inspected before they can leave the quarantine area  Christmas trees from quarantine areas:  cannot be moved into other areas  leftover trees must be chipped, burnt or fumigated (U.S.)

Module 3 63 Control Methods  integrated management programs are used on Christmas tree farms and nurseries  sanitation practices  Bait trees  chemical controls to reduce adult shoot feeding  visual and trap surveys to monitor population levels

Module 3 64 Raccoon Rabies

Module 3 65 Origin and Introduction  Origin: -first reported in Florida in the 1940’s  How it came to Ontario: -rapidly moved to Virginia from the southern states in 1977, likely brought in with animals used for hunting -spread North and South steadily and reached Ontario in 1999

Module 3 66 Range Map

Module 3 67 Identification  rabies is an infectious disease of the central nervous system  caused by a Rhabdo virus  persists in nature as a salivary gland infection of carnivorous animals  all mammals are susceptible

Module 3 68 Identification  once signs of illness appear it is 100% fatal  post exposure treatment is nearly 100% effective  Raccoon rabies is a unique strain of rabies, commonly carried by raccoons, but also by skunks

Module 3 69 Characteristics  no sign is typical or characteristic  only sure way to diagnose is with lab tests  symptoms usually occur days following exposure  dogs days  animal symptoms include :  restlessness  vicious, biting at everything  loss of coordination and tremors  convulsions and paralysis before death

Module 3 70 Similar diseases  Fox rabies is the common strain of rabies  present in Ontario since the 1950’s  Raccoons are also susceptible to distemper, and the symptoms between the two diseases are similar

Module 3 71 Control Methods  The Ontario Ministry of Natural Resources has implemented a control program in two areas; the St. Lawrence Island area, and the Niagara Falls- Welland area. -prior to the first case -trappers were hired to live-trap and vaccinate raccoons in buffer areas aerial baits were dropped in New York State and Vermont

Module 3 72 Control Methods  TVR, aerial baiting zones map from Canadian Geographic or MNR

Module 3 73 Control Methods  since the first confirmed case in Ontario in 1999  Depopulation around confirmed cases  an additional Trap-Vaccinate-Release zone  vaccine baits have been placed in cities and towns  aerial baits have been dropped outside the trapping areas

Module 3 74 West Nile Virus

Module 3 75 Origin  native to Africa  virus has been found in Africa, central Asia, the Middle East, and Mediterranean Europe  most recently found in North America  probably carried as an incubating virus in a person on an airplane to New York City(?)  mosquitoes can transfer the virus from one animal to another

Module 3 76 Introduction  How it came to Ontario:  birds are carriers of the disease, particularly corvids (crows, blue jays)  disease is transmitted to another animals through mosquito bites

Module 3 77 Ontario Status 2001

Module 3 78 Identification and Characteristics  the West Nile Virus causes encephalitis (brain swelling) in humans  the first outbreak in New York City infected 62 people, killing 7

Module 3 79 Identification and Characteristics  potential to infect livestock and poultry  25 horses have been diagnosed with encephalitis on Long Island, 9 died

Module 3 80 White Pine Blister Rust (Cronartium ribicola)

Module 3 81 White Pine Blister Rust

Module 3 82 White Pine Blister Rust

Module 3 83 Life Cycle

Module 3 84 Control  Some white pine will be lost to blister rust  Thin out affected trees during harvesting  Prune infected branches when you see them  Prune lower 1/3 of the branches – decreases humidity and removes potential infection sites  Remove all ribes (currents & goose berries) within 300 m

Module 3 85 Questions & Comments

Module 3 86 Presentation made possible by  Ontario Forestry Association  Eastern Ontario Model Forest  Human Resources Development Canada  Ontario Ministry of Natural Resources  Ontario Stewardship Program  With contributions from:  City of Ottawa  Purdue University