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Donald Owen's Images

Title: Forest Entomologist / Pest Specialist
Organization: California Department of Forestry and Fire Protection
Country: United States
Remove Filters: Conifer(X)
202 Images of 47 Subjects View Subject List View Image Details View Thumbnails

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Image Subject Name Scientific Name Description
5495011 flatheaded fir borer Phaenops drummondi Douglas-fir killed by flatheaded fir borer. Woodpeckers have been feeding on the larvae
5430127 ponderosa pine twig scale Matsucoccus bisetosus preadult scale exposed by removing bark flakes
5430128 ponderosa pine twig scale Matsucoccus bisetosus preadult scale embedded in bark
5495045 pine Pinus spp. pine plantations near Sabie, South Africa
5495046 pine Pinus spp. Pine plantations near Sabie, South Africa
5495047 chacma baboon Papio ursinus Baboon damage (stem girdling) on planted slash pine near Graskrop, South Africa
5495042 Douglas-fir tussock moth Orgyia pseudotsugata 2008 shoot growth on white fir following defoliation and shoot dieback in 2007
5495043 black stain root disease Ophiostoma wageneri resinosis on the lower stem of an infected tree
5495044 pine needle weevils Pachyrhinus spp. adult and typical feeding damage
5495026 pine reproduction weevil Cylindrocopturus eatoni diagnostic puncture wounds on needles made by adults
5495027 pine reproduction weevil Cylindrocopturus eatoni inner bark of infested stem, larval damage
5495028 pine reproduction weevil Cylindrocopturus eatoni larval damage, wood surface of infested stem
5495030 pine reproduction weevil Cylindrocopturus eatoni Larvae in tunnels
5495031 pine reproduction weevil Cylindrocopturus eatoni mature larvae found in the wood. blue ruler is in millimeters
5495033 Douglas-fir tussock moth Orgyia pseudotsugata 2008 shoot growth on white fir following defoliation and shoot dieback in 2007
5495020 pine reproduction weevil Cylindrocopturus eatoni Collected from Pinus ponderosa adult weevil about 2.5 mm in length
5495021 pine reproduction weevil Cylindrocopturus eatoni Collected from Pinus ponderosa Adult weevil about 2.5 mm in length
5495022 Douglas-fir tussock moth Orgyia pseudotsugata Bear Mountain tussock moth outbreak(2007). Mount Shasta in background.
5495023 pine reproduction weevil Cylindrocopturus eatoni Collected from Pinus ponderosa Adult weevil about 2.5 mm in length
5495024 pine reproduction weevil Cylindrocopturus eatoni Collected from Pinus ponderosa adult weevil about 2.5 mm in length
5495025 pine reproduction weevil Cylindrocopturus eatoni Collected from Pinus ponderosa pupa is about 3 mm in length
5495012 chacma baboon Papio ursinus Baboon damage (stem girdling) on planted slash pine near Graskrop, South Africa
5430140 red turpentine beetle Dendroctonus valens spines at the tip of a larva's abdomen collected in Shingletown, CA found on ponderosa pine
1312012 fir engraver Scolytus ventralis Pitch streamers from fir engraver beetle. Tree was felled after being attacked.
5453986 gouty pitch midge Cecidomyia piniinopis swelling and resin bleeding indicates impending emergence of larva from the shoot - late February 2011
5453987 gouty pitch midge Cecidomyia piniinopis bark removed to show mature larva - late February 2011
5453988 gouty pitch midge Cecidomyia piniinopis swelling and resin bleeding indicates impending emergence of larva from the shoot; larva is barely visible as the bark spits open - late February 2011
5453989 gouty pitch midge Cecidomyia piniinopis bark removed to show mature larva - late February 2011
5453990 gouty pitch midge Cecidomyia piniinopis swelling and resin bleeding indicates impending emergence of larva from the shoot; larva is barely visible as the bark spits open - late February 2011
5453991 gouty pitch midge Cecidomyia piniinopis bark removed to show mature larva - late February 2011
5453992 gouty pitch midge Cecidomyia piniinopis mature larva newly emerged from the shoot - late February 2011
5453993 ponderosa pine twig scale Matsucoccus bisetosus adult female emerging from cyst stage
5453994 ponderosa pine twig scale Matsucoccus bisetosus adult female emerging from cyst stage
5453995 black pineleaf scale Dynaspidiotus californica female giving birth to a crawler
5453996 black pineleaf scale Dynaspidiotus californica female giving birth to a crawler
5453997 black pineleaf scale Dynaspidiotus californica crawlers
5453998 black pineleaf scale Dynaspidiotus californica newly settled scales
5453999 black pineleaf scale Dynaspidiotus californica newly settled scales
5454001 black pineleaf scale Dynaspidiotus californica newly settled scales
5454002 black pineleaf scale Dynaspidiotus californica newly settled scales
5454003 black pineleaf scale Dynaspidiotus californica newly settled scales
5454004 white fir Abies concolor white fir cones
5454005 white fir Abies concolor white fir tree
5454006 white fir Abies concolor white fir bark
5454007 Jeffrey pine Pinus jeffreyi Jeffrey pine bark
5454008 Jeffrey pine Pinus jeffreyi Jeffrey pine cones
5454009 Jeffrey pine Pinus jeffreyi Jeffrey pine bark
5454010 incense-cedar Calocedrus decurrens incense cedar bark
5454011 incense-cedar Calocedrus decurrens incense cedar foliage
5454012 white fir Abies concolor white fir bark
5454013 Jeffrey pine Pinus jeffreyi Jeffrey pine bark
5454014 white fir Abies concolor white fir foliage
5454015 incense-cedar Calocedrus decurrens incense-cedar bark
1137041 conifer sawflies Neodiprion spp. a species complex including Neodiprion abietis (Harris) and Neodiprion near delioni Ross. Cocoons of N. near deleoni typically are found in soil.
1137032 Phytophthora root disease of Port Orford cedar Phytophthora lateralis Dying tree, upper Sacramento River, California.
1137038 conifer sawflies Neodiprion spp. a species complex including Neodiprion abietis (Harris) and Neodiprion near delioni Ross. Larvae feed on the previous year's needles in the spring.
1137039 conifer sawflies Neodiprion spp. a species complex including Neodiprion abietis (Harris) and Neodiprion near delioni Ross. Defoliation occurs on smaller trees and the lower branches of larger trees.
1137040 conifer sawflies Neodiprion spp. a species complex including Neodiprion abietis (Harris) and Neodiprion near delioni Ross. Cocoons of N. abietis are typically found on foliage.
1137029 white fir dwarf mistletoe Arceuthobium abietinum f.sp. concoloris Mistletoe seed germinating
1137027 western dwarf mistletoe Arceuthobium campylopodum heavily infected pine
1137028 white fir dwarf mistletoe Arceuthobium abietinum f.sp. concoloris Dwarf mistletoe infection on the bole of white fir.
1137023 black stain root disease Ophiostoma wageneri
1137019 annosum root disease Heterobasidion annosum Butt rot.
1137017 annosum root disease Heterobasidion annosum
1137013 Monterey pine Pinus radiata Pine stand regenerated as a result of wildfire.
1137014 Monterey pine Pinus radiata Native Monterey pine forest.
1137015 Monterey pine Pinus radiata Young pine exhibiting exceptional height growth.
1312013 fir engraver Scolytus ventralis
1312016 red turpentine beetle Dendroctonus valens Shanxi Province, China, 2001
1137035 conifer sawflies Neodiprion spp. a species complex including Neodiprion abietis (Harris) and Neodiprion near delioni Ross. Oviposition sites on needles. Typically one egg is laid per needle.
1312032 red belt abiotic damage
1312006 red turpentine beetle Dendroctonus valens Pitch tubes on fire-scorched ponderosa pine.
1137037 conifer sawflies Neodiprion spp. a species complex including Neodiprion abietis (Harris) and Neodiprion near delioni Ross. Feeding on foliage.
1137018 annosum root disease Heterobasidion annosum
1312028 pine needle sheathminer Zelleria haimbachi Oviposition site and mine.
1137046 Douglas-fir tussock moth Orgyia pseudotsugata A defoliated white fir, the preferred host, stands next to a Red fir, Abies magnifica, a non-host.
1312014 fir engraver Scolytus ventralis
1312018 Diplodia blight Sphaeropsis sapinea Bark was cut away to reveal resinosis and staining in the wood.
1312025 pine needle sheathminer Zelleria haimbachi Sheath-feeding stage.
1137026 western dwarf mistletoe Arceuthobium campylopodum Infection on the bole at Yosemite Valley
1312040 spruce aphid Elatobium abietinum
1312033 pitch canker Fusarium circinatum Pitch canker on a sapling.
1312019 Diplodia blight Sphaeropsis sapinea Redish-brown needles are current year's infections. Gray needles are from previous year's infections.
1312010 fir engraver Scolytus ventralis Embedded scar from an unsuccessful attack of the fir engraver beetle on white fir.
1312027 pine needle sheathminer Zelleria haimbachi
1137024 black stain root disease Ophiostoma wageneri Tangential surface of stained sapwood in lower bole.
1137043 pandora moth Coloradia pandora Defoliated pine. Inyo National Forest, California
1137025 black stain root disease Ophiostoma wageneri Transverse surface of stained sapwood in lower bole.
1312029 pine needle sheathminer Zelleria haimbachi Mine and exit hole.
1137016 Monterey pine Pinus radiata Mature Monterey pine.
1312037 pitch canker Fusarium circinatum infestation in planted pine
1312036 pitch canker Fusarium circinatum On the bole.
1137021 black stain root disease Ophiostoma wageneri
1312034 pitch canker Fusarium circinatum
1312017 Diplodia blight Sphaeropsis sapinea Heavily diseased with Diplodia Blight.
5430129 ponderosa pine twig scale Matsucoccus bisetosus adult male searching bark for a female
5430130 ponderosa pine twig scale Matsucoccus bisetosus adult female on bark
5430131 ponderosa pine twig scale Matsucoccus bisetosus adult pair mating on bark surface
5430132 ponderosa pine twig scale Matsucoccus bisetosus adult female on bark
5430133 ponderosa pine twig scale Matsucoccus bisetosus adult female on bark
5430134 ponderosa pine twig scale Matsucoccus bisetosus gravid female settled in bark crevice
5430135 ponderosa pine twig scale Matsucoccus bisetosus eggs(on a finger tip)
5430136 ponderosa pine twig scale Matsucoccus bisetosus eggs and shriveled female body in bark crevice
5430137 ponderosa pine twig scale Matsucoccus bisetosus eggs and shriveled female body exposed by removing bark flakes
5430138 red turpentine beetle Dendroctonus valens adult found on ponderosa pine
5430139 red turpentine beetle Dendroctonus valens collected in Shingletown, CA found on ponderosa pine
5430141 red turpentine beetle Dendroctonus valens pitch tubes
5430142 red turpentine beetle Dendroctonus valens stump with bark removed showing red turpentine beetle galleries and blue stain
5430143 Diplodia blight Sphaeropsis sapinea branch tip dieback
5430145 black pineleaf scale Dynaspidiotus californica fully developed scales; elongate scale is a male, the other is a female
5430146 black pineleaf scale Dynaspidiotus californica adult male found on ponderosa pine
5430147 black pineleaf scale Dynaspidiotus californica female scales; scale coverings removed
1312035 pitch canker Fusarium circinatum On a branch
1312021 western pine beetle Dendroctonus brevicomis Exit holes.
1312030 pine needle sheathminer Zelleria haimbachi
1312031 red belt abiotic damage
1312038 pitch canker Fusarium circinatum on seedling
1137036 conifer sawflies Neodiprion spp. a species complex including Neodiprion abietis (Harris) and Neodiprion near delioni Ross. Egg protuding from needle.
1137022 black stain root disease Ophiostoma wageneri
1137020 annosum root disease Heterobasidion annosum disease center in a stand of white fir.
1312041 ponderosa pine Pinus ponderosa Lopping exposes the stem to greater solar radiation and reduces its suitability as a breeding site for Ips bark beetles.
1312015 fir engraver Scolytus ventralis Top-kill
1312020 Diplodia blight Sphaeropsis sapinea Conidia of Diplodia pinea (Desm.) Kickx, the casual agent of Dipodia blight. From pycnidia on cones.
1312039 spruce aphid Elatobium abietinum
1312042 California fivespined ips Ips paraconfusus Beetles increased in number by breeding in slash prior to attacking nearby trees.
5387828 ponderosa pine tip moth Rhyacionia zozana Adult of the ponderosa pine tip moth, Rhyacionia zozana. 3/28/07.
5387800 gouty pitch midge Cecidomyia piniinopis Branch flagging on ponderosa pine due to gouty pitch midge, Cecidomyia piniinopis. 6/29/07.
5387791 annosum root disease Heterobasidion annosum 6/4/2008; decayed wood
5387792 incense cedar broom rust Gymnosporangium libocedri telial cushions on foliage; 06/05/2008
5387793 red heart of pine Phellinus pini white pocket rot
5387794 red heart of pine Phellinus pini white pocket rot; conk on the bark surface at a branch stub; 10/03/2007
5387795 red heart of pine Phellinus pini White pocket rot; conk on the bark surface at branch stub; 10/03/2007
5387796 knobcone pine Pinus attenuata Fire-scorched knobcone pine with serotinous cones; 07/21/2008
5387797 knobcone pine Pinus attenuata Fire-scorched knobcone pine with serotinous cones; 07/21/2008
5387798 gouty pitch midge Cecidomyia piniinopis Ponderosa pine plantation infested with gouty pitch midge, Cecidomyia piniinopis. 5/29/08.
1312026 pine needle sheathminer Zelleria haimbachi Late instar larva.
5387799 gouty pitch midge Cecidomyia piniinopis Ponderosa pines infested with gouty pitch midge, Cecidomyia piniinopis, next to an uninfested, resistant tree. 6/29/07.
5387801 gouty pitch midge Cecidomyia piniinopis Ponderosa pine shoot infested with gouty pitch midge, Cecidomyia piniinopis. Infested shoots survive for one year, the duration of the life cycle, before fading. Not all infested shoots die. 5/29/08
5387802 gouty pitch midge Cecidomyia piniinopis Ponderosa pine shoot infested with gouty pitch midge, Cecidomyia piniinopis. Infested shoots survive for one year, the duration of the life cycle, before fading. Not all infested shoots die. 5/29/08
5387803 gouty pitch midge Cecidomyia piniinopis Scarring on this ponderosa pine branch indicates that a previous year’s infestation of the gouty pitch midge, Cecidomyia piniinopis, failed to kill the shoot. 6/29/07.
5387804 gouty pitch midge Cecidomyia piniinopis Infested ponderosa pine shoot cut open to expose larvae of the gouty pitch midge, Cecidomyia piniinopis. 12/20/07.
5387805 gouty pitch midge Cecidomyia piniinopis Larva of the gouty pitch midge, Cecidomyia piniinopis. 1/17/08.
5387806 gouty pitch midge Cecidomyia piniinopis Cocoons of the gouty pitch midge, Cecidomyia piniinopis, on ponderosa pine needles. 3/24/08.
5387807 gouty pitch midge Cecidomyia piniinopis Cocoons of the gouty pitch midge, Cecidomyia piniinopis, on ponderosa pine needles. 3/24/08.
5387808 gouty pitch midge Cecidomyia piniinopis Cocoon of the gouty pitch midge, Cecidomyia piniinopis. 3/24/08.
5387809 gouty pitch midge Cecidomyia piniinopis Empty cocoons and pupal cases of the gouty pitch midge, Cecidomyia piniinopis, on ponderosa pine needles. 4/1/08.
5387810 gouty pitch midge Cecidomyia piniinopis Adult of the gouty pitch midge, Cecidomyia piniinopis. 4/1/08.
5387811 fir engraver Scolytus ventralis Galleries of the fir engraver beetle, Scolytus ventralis, on white fir, A. concolor. The tree was attacked in successive years before being killed. 10/29/08.
5387812 Douglas-fir tussock moth Orgyia pseudotsugata 5th instar larva of the Douglas-fir tussock moth, Orgyia psuedotsugata, on white fir, A. concolor. 7/11/07.
5387813 Douglas-fir tussock moth Orgyia pseudotsugata 5th instar larva of the Douglas-fir tussock moth, Orgyia psuedotsugata, on white fir, A. concolor. 7/11/07.
5387814 Douglas-fir tussock moth Orgyia pseudotsugata 5th instar larva of the Douglas-fir tussock moth, Orgyia psuedotsugata, on white fir, A. concolor. 7/11/07.
5387815 Douglas-fir tussock moth Orgyia pseudotsugata 4th instar larva of the Douglas-fir tussock moth, Orgyia psuedotsugata, on white fir, A. concolor. 6/27/07.
5387816 pale swallowtail Papilio eurymedon Chrysalis of the pale tiger swallowtail, Papilio eurymedon, on ponderosa pine. 3/21/08.
5387817 ponderosa pine twig scale Matsucoccus bisetosus Damage from the ponderosa pine twig scale, Matsucoccus bisetosus, on ponderosa pine. 5/14/07.
5387818 California flatheaded borer Phaenops californica Cambial damage to Jeffrey pine, P. jeffreyi, caused by the California flatheaded borer, Melanophila californica. 4/28/08.
5387819 pine needle sheathminer Zelleria haimbachi Ponderosa pine shoot damaged by the pine needle sheathminer, Zelleria haimbachi. 9/12/07.
5387820 pine needle sheathminer Zelleria haimbachi Ponderosa pine damaged by the pine needle sheathminer, Zelleria haimbachi. 9/12/07.
5387821 ponderosa pine tip moth Rhyacionia zozana Eggs of the ponderosa pine tip moth, Rhyacionia zozana, are usually laid on new shoots. 5/4/07.
5387822 ponderosa pine tip moth Rhyacionia zozana Eggs of the ponderosa pine tip moth, Rhyacionia zozana, are usually laid on new shoots. 5/4/07.
5387823 ponderosa pine tip moth Rhyacionia zozana Eggs of the ponderosa pine tip moth, Rhyacionia zozana, are occasionally laid on older needles. 5/4/07.
5387824 ponderosa pine tip moth Rhyacionia zozana Larva of the ponderosa pine tip moth, Rhyacionia zozana, next to its silken, resinous shelter. 6/18/07.
5387825 ponderosa pine tip moth Rhyacionia zozana Larva of the ponderosa pine tip moth, Rhyacionia zozana, on a ponderosa pine shoot. 6/18/07.
5387826 ponderosa pine tip moth Rhyacionia zozana Pupae and cocoon of the ponderosa pine tip moth, Rhyacionia zozana. 2/16/07.
5387827 ponderosa pine tip moth Rhyacionia zozana Cocoons of the ponderosa pine tip moth, Rhyacionia zozana, attached to the base of a ponderosa pine. Bark scales were chipped away to reveal the cocoons beneath. 2/15/07.
5387829 ponderosa pine tip moth Rhyacionia zozana Adult of the ponderosa pine tip moth, Rhyacionia zozana. 5/8/07.
5387830 ponderosa pine tip moth Rhyacionia zozana Ponderosa pine shoot damaged by the ponderosa pine tip moth, Rhyacionia zozana. 5/31/07.
5387831 ponderosa pine tip moth Rhyacionia zozana Ponderosa pine shoot damaged by the ponderosa pine tip moth, Rhyacionia zozana. Larvae mine the interior of shoots, often leaving little wood behind. 6/18/07.
5387832 ponderosa pine tip moth Rhyacionia zozana Ponderosa pine heavily damaged by the ponderosa pine tip moth, Rhyacionia zozana. 2/15/07.
5387833 ponderosa pine tip moth Rhyacionia zozana Ponderosa pine plantation damaged by the ponderosa pine tip moth, Rhyacionia zozana. 2/15/07.
5387834 mountain hemlock Tsuga mertensiana Mountain hemlock, Tsuga mertensiana. 9/20/08.
5387835 mountain hemlock Tsuga mertensiana Foliage of mountain hemlock, Tsuga mertensiana. 9/21/08.
5387836 mountain hemlock Tsuga mertensiana Bark and foliage of mountain hemlock, Tsuga mertensiana. 9/20/08.
5387837 whitebark pine Pinus albicaulis Whitebark pine, Pinus albicaulis. 10/16/07.
5387839 California red fir Abies magnifica Red fir, Abies magnifica. 9/20/08.
5387840 California red fir Abies magnifica Red fir, Abies magnifica. 9/20/08.
5387841 California red fir Abies magnifica Old-growth stand of red fir, Abies magnifica. 9/20/08.
5387842 California red fir Abies magnifica Mature red fir, Abies magnifica, with bayonet tops. 9/21/08.
5387843 California red fir Abies magnifica Red fir, Abies magnifica. 10/16/07.
5387844 California red fir Abies magnifica Foliage of red fir, Abies magnifica. 9/21/08.
5387845 California red fir Abies magnifica Foliage of red fir, Abies magnifica. 9/21/08.
5387846 California red fir Abies magnifica Bark of a mature red fir, Abies magnifica. 9/21/08.
5387847 California red fir Abies magnifica Outer bark of red fir, Abies magnifica. 9/21/08.
1312024 ponderosa pine Pinus ponderosa Yosemite Valley, California. December 1978
1312011 fir engraver Scolytus ventralis Embedded scar from an unsuccessful attack of the fir engraver beetle on white fir.
1312007 red turpentine beetle Dendroctonus valens Pitch tubes on fire-scorched ponderosa pine.
1312008 red turpentine beetle Dendroctonus valens
1312009 red turpentine beetle Dendroctonus valens Boring dust from turpentine beetle attacks on Monterey Pine.
1312001 flat bark beetle Cucujus clavipes
1312002 ceanothus silk moth Hyalophora euryalus Shasta County, California
1312003 jumping oak gall Neuroterus saltatorius These leaf galls are about 1mm in diameter. They jump like Mexican jumping beans after falling to the ground.
1312004 Cynipid gall wasp
1312005 root-feeding bark beetle Hylastes macer Attacks pines in western North America.
1312043 California fivespined ips Ips paraconfusus
1312044 Monterey pine ips Pseudips mexicanus callow adult
1137033 Phytophthora root disease of Port Orford cedar Phytophthora lateralis Stain from POC root disease and galleries of the bark beetle Phleosinus sequoiae Hopkins on the Smith River
1137030 Douglas-fir dwarf mistletoe Arceuthobium douglasii The small dwarf mistletoe plants are barely visible. Siskiyou County, California
1137047 Douglas-fir tussock moth Orgyia pseudotsugata Silken webbing from dispersing first instar larvae blankets white fir trees during an outbreak. Plumas County, California.
1137045 pandora moth Coloradia pandora Parasitized pandora moth larva. Inyo National Forest, California.
1137044 pandora moth Coloradia pandora Diseased and healthy larvae.
1137034 hail Wounds are on upper needle surface.
1137031 Phytophthora root disease of Port Orford cedar Phytophthora lateralis Dead and Dying cedars on Smith River
1137042 conifer sawflies Neodiprion spp. Female; flight takes place in late October.

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