Oak and Tanoak Pest Issues. Tom Smith Forest Pest Management California Department of Forestry and Fire protection

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1 Oak and Tanoak Pest Issues Tom Smith Forest Pest Management California Department of Forestry and Fire protection

2 California Oak Woodlands

3 Issues Urbanization Fragmentation Fire Regimes Stand Structure and Composition Weather and Climate Invasive Species

4 Urbanization

5 Urbanization

6 Nearly 40 Million People Live in California Almost ½ Million Acres of Land are Converted to Urban Uses Every Decade More People Live in the Wild-land Urban Interface Also Pollution Issues

7 Invasive Species and Oaks

8 PERCENT Trends in California Pests % EXOTIC PESTS IN CALIFORNIA % EXOTIC PESTS Linear (% EXOTIC PESTS) YEAR

9 Sudden Oak Death (Phytophthora ramorum)

10 Sudden Oak Death California Oak Mortality Task Force death.org/

11 Sudden Oak Death New Infestation in the Redwood Valley area in Humboldt County New Problems on Larch in Great Britain New Infestation in Jackson State Forest New Hosts?

12 Sudden Oak Death

13 Sudden Oak Death Aerial Survey for Mortality 2013

14 Sudden Oak Death

15 Sudden Oak Death

16 Sudden Oak Death Tree Hosts Include: Tanoak, Coast Live Oak, Shreve Oak, Black Oak, Canyon Life Oak, California Bay Laurel, Madrone, Big Leaf Maple, Coast Redwood, Douglas Fir, Grand Fir, White Fir, Red Fir, California Buckeye, Toyon Other Major Hosts Include: Rhododendron, Huckleberry, Poison Oak, Honeysuckle, Camellia, Manzanita

17 Sudden Oak Death Symptoms also Include Leaf Spots and Blotches Rhododendron Bay Laurel Big Leaf Maple

18 Sudden Oak Death Douglas Fir Coast Redwood Symptoms can Also Include Tip Dieback

19 Sudden Oak Death Disease Spread Spores Produced on Foliar Hosts Spread by Rainsplash, Wind Also Found in Soil and Stream Water Human Long Distance Spread (Movement of Infected Plant Material, Soil, Etc.)

20 Sudden Oak Death Management Individual Tree vs. Stand Suppression vs. Eradication

21 Redwood Creek Site

22 Fire for SOD Control

23 Aerial Detection Surveys Mortality similar to 2011 levels 511,000 acres of elevated mortality mapped in 2012 Estimated 1.78 million trees killed Especially noted an increase in mortality due to sudden oak death

24 Goldspotted Oak Borer Zone of Infestation Continuing to Spread Infestation in Riverside County Agrilus auroguttatus

25 Goldspotted Oak Borer

26

27 Damage

28 GSOB life cycle Healthy and/or stressed Tree - Eggs laid in bark crevices??? Larvae chew through bark to sapwood surface Summer Larvae make galleries along sapwood surface, packed with frass. - Destructive phase of insect - Tree health declines Summer through Late Fall May - October Adults emerge D shaped exit holes. - feed on oak leaves. Summer Late Fall June - October Pupae bore out to outer bark and resemble adults white in color Summer Late Fall June - October

29 GSOB

30 GSOB Hosts

31 GSOB Symptoms

32 GSOB Exit Holes

33 Distribution of Oaks Susceptible to GSOB Coastal Live Oak Quercus agrifolia Canyon Live Oak Quercus chrysolepis California Black Oak Quercus kelloggii

34

35 Purple Panel Traps Monitoring

36 GSOB Control

37 Management - Chipping

38 Management - Tarping

39 Management Debarking and Drying Best if all bark is removed Wood that is left for two years is free of any live stages of the insect

40 Insecticide trials

41 Management - Removal

42 Biological control UCR is conducting most of this work Surveys in AZ and MX have been conducted, and more surveys will happen Parasitoids have been found and we continue to look for more In 2010, effort was made by UCR to establish GSOB populations in the lab

43 Danger of Firewood Movement

44 Polyphagous Shot Hole Borer Newest invasive pest in California Also carries a new invasive species of Fusarium fungus Euwallacea sp.

45 Polyphagous Shot Hole Borer Small ambrosia beetle Beetle and fungus together kill avocado, oak, maple and castor bean Also attacks sycamore, willow, bay laurel, olive, grape and numerous other native and exotic trees

46 Polyphagous Shot Hole Borer Beetle Bore Holes Infested with Fusarium

47 Polyphagous Shot Hole Borer Entrance Holes Oozing from entrance hole

48 Polyphagous Shot Hole Borer Stained Wood under bark Sugar Volcnoes

49 Polyphagous Shot Hole Borer

50 Polyphagous Shot Hole Borer

51 Light Brown Apple Moth

52 Timber Species Affected by LBAM Monterey Pine Other Pines Douglas Fir True Firs Spruce Oaks Maple Coast Redwood

53 Potential Nationwide Impacts Spread Potential in US Forestry Pine Forest Type in USA Oak Forest Type in USA

54 Forest Management A Pest of Regeneration and Young Plantations in New Zealand Records of Several Hectares of Eucalypts Defoliated in Australia Quarantine Regulations Christmas Trees Cumulative Impacts of Pesticides Fire Danger Endangered Species Riparian Areas

55 LBAM Control

56

57 Gypsy Moth

58 Severe Defoliation

59 Gypsy Moth

60 Caterpillar Feeding on Oak

61 Male and Female Moths on an Egg Mass

62 Female Moths Laying Egg Masses

63 GM Damage

64 Eastern USA Infestation Gypsy Moth Range in Europe and Asia

65 Zone of Infestation in the Northeastern United States

66

67 Host List Hardwoods Conifers* CA Hosts** Oak Pine Live Oak Aspen Spruce Douglas Fir Birch Fir Manzanita Willow Other Oaks Alder Others? *Feeding by older larvae **Known from previous outbreaks in CA

68 Spread of the Insect to New Areas Egg Masses on Vehicle

69 Management

70 Asian Gypsy Moth

71 Firewood Task Force

72 In first 10 months of million pounds of firewood entered CA at the border stations Firewood came from 43 states 122 potential forest pests were intercepted Firewood Movement

73 Firewood Concerns A Major Source of Movement of Insects and Diseases Between States and Within California Examples Include Gypsy Moth, SOD, Pitch Canker, Asian Longhorn Beetle, Emerald Ash Borer

74 Questions?

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