| 1396096 |
royal star magnolia |
Magnolia stellata |
|
| 1396009 |
bronze birch borer |
Agrilus anxius |
dead branches |
| 1396032 |
oak lace bug |
Corythucha arcuata |
|
| 1396137 |
American elm |
Ulmus americana |
|
| 1396120 |
walnut shoot moth |
Acrobasis demotella |
|
| 1396080 |
Eriophyid mites |
Eriophyes spp. |
|
| 1396141 |
butternut canker |
Sirococcus clavigignenti-juglandacearum |
|
| 1396150 |
Nectria canker |
Nectria spp. |
|
| 1396083 |
horned oak gall |
Callirhytis cornigera |
Shawnee National Forest |
| 1396031 |
oak lace bug |
Corythucha arcuata |
|
| 1396123 |
pecan leaf casebearer |
Acrobasis juglandis |
emerging from case |
| 1396127 |
leafhopper |
Typhlocyba albicans |
Hiawatha National Forest |
| 1396143 |
butternut canker |
Sirococcus clavigignenti-juglandacearum |
|
| 1396144 |
Eutypella canker |
Eutypella parasitica |
Argonne Experimental Forest |
| 1396142 |
butternut canker |
Sirococcus clavigignenti-juglandacearum |
|
| 1398052 |
Dutch elm disease |
Ophiostoma ulmi |
|
| 1396140 |
Dutch elm disease |
Ophiostoma ulmi |
Wildcat Mountain Park |
| 1396098 |
yellow birch |
Betula alleghaniensis |
|
| 1396040 |
maple trumpet skeletonizer |
Catastega aceriella |
|
| 1396148 |
butternut canker |
Sirococcus clavigignenti-juglandacearum |
|
| 1396078 |
Cynipid gall wasp |
Andricus ignotus |
gall on oak; agamic generation |
| 1396095 |
Kentucky coffeetree |
Gymnocladus dioicus |
|
| 1396139 |
Dutch elm disease |
Ophiostoma ulmi |
|
| 1396039 |
maple trumpet skeletonizer |
Catastega aceriella |
|
| 1396136 |
Dutch elm disease |
Ophiostoma ulmi |
|
| 1396173 |
human caused injury |
|
tapping injury |
| 1396155 |
black walnut |
Juglans nigra |
walnut handling, Wilson Nursery |
| 1396138 |
Dutch elm disease |
Ophiostoma ulmi |
Wildcat Mountain Park |
| 1396027 |
yellownecked caterpillar |
Datana ministra |
|
| 1396147 |
butternut canker |
Sirococcus clavigignenti-juglandacearum |
|
| 5050081 |
decay |
|
Decay column in red maple. |
| 5044020 |
gypsy moth |
Lymantria dispar |
Gypsy moth male and female |
| 5051092 |
Eutypella canker |
Eutypella parasitica |
Eutypella canker on small tree |
| 1407004 |
flowering dogwood |
Cornus florida |
or in a cluster of many small flowers, such as this dogwood blossom. |
| 1407005 |
eucalyptus |
Eucalyptus spp. |
Flowers vary widely in their structure and appearance. This eucalypt blossom has an array of showy male parts but not petals. |
| 1407006 |
oak |
Quercus spp. |
On many trees, male and female parts grow separately. These are catkin, the male flowers of an oak. In some species, female flowers grow on one tree and male flowers on another. |
| 1407009 |
northern red oak |
Quercus rubra |
An acorn.... |
| 1407010 |
oak |
Quercus spp. |
becomes an oak, drawing energy from the seed for its first spurt of growth. |
| 1407011 |
maple |
Acer spp. |
Young trees face many threats to survival, including constant wounding, |
| 1407016 |
birch |
Betula spp. |
These birch buds are bursting with the stored energy... |
| 1407019 |
sugar maple |
Acer saccharum |
When their work is done, they fall, |
| 1407003 |
yellow-poplar |
Liriodendron tulipifera |
Life begins for a tree when a male and a female cell meet. These cells may occur together in a single flower, |
| 1407051 |
mountain ash |
Eucalyptus regnans |
Many forms of life could live on and in this Tasmanian tree, believed to be the largest hardwood in the world. |
| 1407052 |
Dutch elm disease |
Ophiostoma ulmi |
Like all living things, trees eventually die and decay, victims of many living and manmade agents. The agent here is Dutch elm disease. To ward off this widespread infection, keep elm trees well pruned. If they do become infected, cut and destroy the diseased trees as soon as possible. |
| 1407031 |
fire |
|
Throughout the ages, many trees have been wounded by fire, both natural and man-caused. |
| 1407032 |
fire |
|
Fire wounds can be fatal. |
| 0488023 |
gypsy moth |
Lymantria dispar |
forest types susceptible and potentially susceptible to attacks |
| 1396154 |
black walnut |
Juglans nigra |
walnut storage in nursery |
| 1398045 |
sycamore lace bug |
Corythucha ciliata |
|
| 1396176 |
larch bolete |
Suillus grevillei |
mycorrhizal |
| 1396151 |
beech bark disease |
Nectria coccinea |
|
| 1396028 |
yellownecked caterpillar |
Datana ministra |
|
| 1396029 |
orangestriped oakworm |
Anisota senatoria |
|
| 1396079 |
pales weevil |
Hylobius pales |
gall close-up |
| 1396047 |
variable oakleaf caterpillar |
Lochmaeus manteo |
|
| 1396060 |
lacewings |
|
|
| 1396066 |
basswood thrips |
Neohydatothrips tiliae |
|
| 1396067 |
gypsy moth |
Lymantria dispar |
|
| 1396069 |
uglynest caterpillar |
Archips cerasivorana |
|
| 1396010 |
bronze birch borer |
Agrilus anxius |
exit hole |
| 1396011 |
bronze birch borer |
Agrilus anxius |
exit hole |
| 1396012 |
bronze birch borer |
Agrilus anxius |
|
| 1396023 |
variable oakleaf caterpillar |
Lochmaeus manteo |
|
| 1396024 |
variable oakleaf caterpillar |
Lochmaeus manteo |
|
| 1396025 |
variable oakleaf caterpillar |
Lochmaeus manteo |
|
| 1396026 |
variable oakleaf caterpillar |
Lochmaeus manteo |
|
| 1396149 |
Nectria canker |
Nectria spp. |
|
| 1396145 |
Eutypella canker |
Eutypella parasitica |
showing yearly progression of canker |
| 1396146 |
chestnut blight or canker |
Cryphonectria parasitica |
dead tree, picture taken 1943 |
| 1396121 |
walnut shoot moth |
Acrobasis demotella |
|
| 1396122 |
walnut shoot moth |
Acrobasis demotella |
frass |
| 1396082 |
horned oak gall |
Callirhytis cornigera |
|
| 1396084 |
mourning cloak butterfly |
Nymphalis antiopa |
|
| 1396087 |
post oak grasshopper |
Dendrotettix quercus |
|
| 1396088 |
post oak grasshopper |
Dendrotettix quercus |
|
| 1396094 |
spring cankerworm |
Paleacrita vernata |
|
| 1396105 |
twolined chestnut borer |
Agrilus bilineatus |
|
| 1396106 |
elm spanworm |
Ennomos subsignaria |
|
| 1396107 |
large aspen tortrix |
Choristoneura conflictana |
|
| 1396128 |
locust leafminer |
Odontota dorsalis |
|
| 1396129 |
hackberry nipple gall parasitoid |
Eurytoma semivenae |
|
| 1396130 |
hackberry nipple gall parasitoid |
Eurytoma semivenae |
|
| 1396132 |
sapstreak disease of sugar maple |
Ceratocystis coerulescens |
|
| 1398104 |
gypsy moth |
Lymantria dispar |
Historical photo of workers searching for gypsy moth egg masses |
