Tree and Shrub InsectsWhere Personal Service is Always in Season....
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Tree and Shrub InsectsWhere Personal Service is Always in Season....
A p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sA p h i d sAphids are small soft-bodied
insects that suck plant juices.
High aphid populations can
cause leaves to yellow, curl,
or drop early. The most
bothersome aspect of aphids
is the honeydew they produce.
Honeydew is sugary water
excreted by aphids. Sooty
mold grows on the honeydew
creating a sticky, unsightly
mess on trees, sidewalks, and
automobiles.
CONTROL:
Insecticide applications will
help control aphid populations.
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Tree and Shrub InsectsWhere Personal Service is Always in Season....
B a g w oB a g w oB a g w oB a g w oB a g w oB a g w oB a g w oB a g w oB a g w oB a g w oB a g w oB a g w oB a g w oB a g w oB a g w oB a g w oB a g w oB a g w oB a g w oB a g w oB a g w oB a g w oB a g w oB a g w oB a g w oB a g w oB a g w oB a g w oB a g w oB a g w oB a g w oB a g w oB a g w oB a g w oB a g w oB a g w o r m sBagworms are caterpillars
that make distinctive spindle
shaped bags on a variety
of trees and shrubs. They
attack both deciduous trees
and evergreens, but are
especially damaging to
juniper, arborvitae, spruce,
pine, and cedar. Large
infestations of bagworms
can strip plants of their foliage
and eventually cause them
to die. Bagworms pass the
winter as eggs inside the bag
that contained the previous
year’s female. An insecticide
application will be needed
to prevent serious damage.
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Tree and Shrub InsectsWhere Personal Service is Always in Season....
B o r e r sB o rB o rB o rB o rB o rB o rB o rB o rB o rB o rB o rB o rB o rB o rB o rB o rB o rB o rB o rB o r e rB o r e rB o r eB o r eB o r eB o r eB o r e r sre re rB o r e r sB o r e r sB o r e r s
Most woody landscape plants
can be attacked by borers.
There are many types of bor-
ers, the Emerald Ash borer be-
ing the most known. The larvae
bore beneath the bark into the
wood on tree limbs, trunks, and
main roots. Damage can vary
from foliage being discolored,
wilt, limbs may die back, and
branches or entire plants may
die. Borers attack mostly dam-
aged or dying plants. Healthy
trees are rarely attacked. Pes-
ticide applications to the bark
have not been found effec-
tive. Injections of insecticide
can provide control depending
on the damage that is already
done. The best prevention is to
keep trees healthy.
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Tree and Shrub InsectsWhere Personal Service is Always in Season....
CarpenteCarCarCCCCCCCCCCCCCCCCCCCCarCCarCarCCarpentarpentarpearpearpepentpentntentententCarpenteCarpenteCarpenter Ants
Carpenter ants nest
underground or in wood.
They do not eat wood,
but their tunnels weaken
limbs causing them to
decline. Carpenter ants
feed on insects, honeydew,
and plant sap. Keeping
plants properly pruned,
preventing injuries, and
controlling the insects will
help prevent carpenter
ants and termites from
attacking the trees.
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Tree and Shrub InsectsWhere Personal Service is Always in Season....
Fall WebFaFaFFFaFaFall Well Well Wll Wll Wll Well WeebWeWeFall WebFall WebFall Webworms
Webworms also feed on
deciduous trees. Their webs
are formed over the foliage
toward the outer portions of
the tree. Adult moths emerge
in the late spring or early
summer and are mostly white.
In June or July, the females
lay eggs beneath leaves.
These eggs hatch in about
10 days and feed in the
silken tents until late summer
or early fall. The use of a
high-pressure insecticide
spray will penetrate the
webbed foliage and control
the worms.
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Tree and Shrub InsectsWhere Personal Service is Always in Season....
I n s e c tI nI nIIIIIIII nI nI n s e c ts e c ts es ee ce cc tc tc te ce ce cI n s e c tI n s e c tI n s e c t G a l l
In the spring, before leaves are fully developed, insects lay eggs in the leaf or stem of a variety of plants. Galls are abnormal growths of plant cells that are formed around these eggs. After a brief period of cell growth, the gall stops developing. The insect becomes enclosed by the gall and feeds only on gall tissue during its development. Small holes on the outside of the gall indicate that the adult insects have emerged. Generally galls do not seriously harm the plant. If your tree or plant is al-ready unhealthy or under stress, the damage that does occur can be to a greater extent than that of a healthy plant. Keeping trees and shrubs fer-tilized, irrigated, and pruned properly will help keep plants healthy.
After the formation of galls it is im-possible to eliminate the insects with insecticides because they are enclosed and protected inside the gall. Galls that occur on the leaves will drop off with the leaves but those on the trunk or stems may persist for several years. Controlling galls with insecticides is usually not practical because there is minimal timing to control the adult pest before the gall is formed.
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Tree and Shrub InsectsWhere Personal Service is Always in Season....
Lace BugLaLaLLLLLLLLLLLLLLLacLLaLaLL e Bue Bue e e e Be BugBu Bu BuLace BugLace BugL a c e B u g sMost adult lace bugs are
about 1/8 inch long and fl at.
The body is concealed
beneath lacelike forewings.
The nymphs and adults live
on the lower surface of the
leaves and suck juices
through slender, piercing
mouth parts. This produces
yellow or whitish spots on the
upper surface of the leaf.
Applications of insecticide
to the lower leaf surfaces will
limit their infestation
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Tree and Shrub InsectsWhere Personal Service is Always in Season....
Leaf HoLeLeLLLeLLeLeaf Haf Haf af af f Hf Ho Hof Hf Hf HLeaf HoLeaf HoLeaf HoppersThere are several
hundred species of
leafhoppers. Most
adult leafhoppers are
¼ inch or shorter. Some
species are bright colored
while others blend in with
their surroundings. Leaf-
hoppers suck the juice
from various plants
causing the leaves to
appear stripped, pale, or
brown. The best control is
to have the landscape
sprayed with the dormant
oil to reduce any
overwintering eggs.
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Tree and Shrub InsectsWhere Personal Service is Always in Season....
Leaf MinLeLeLLLLLLLLLLLLeaLLeLeLL f Mif Mif Mf Mf Mf Mf MMinf Mif MiLeaf MinLeaf MinL e a f M i n e r s
The larvae of several
different families of small
moths are the most common
foliage-mining pests in the
landscape. These leaf
miners feed inside the leaves,
needles, shoots, or buds.
Leaf miners cause off-color
patches, trailing patterns, or
holes in leaves. Severe
infestations can slow plant
growth, but established plants
are rarely killed by these
insects. Pruning out and
disposing infested foliage
along with insecticide
applications will help keep
these insects under control.
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Tree and Shrub InsectsWhere Personal Service is Always in Season....
S c a l eSSS cSS a l ea l eaaaa la ll ea l ea l eS c a l eS c a l eS c a l e
Scale insects feed by
sucking plant fl uids, and
some may inject toxic
saliva into plants. Most
scale species are one of
two types, armored or soft.
Armored scale is less than
1/8 inch long and has a
plate like shell. Soft scale
are 1/4 inch or smaller.
Scale are also honeydew
excreters. Soft scale have
several annual generations
which overlap so that
multiple life stages are
usually present at once.
High infestations can kill
a plant rather rapidly.
Dormant oil applications
are used to control scale.
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Tree and Shrub InsectsWhere Personal Service is Always in Season....
SpidermSpidSpidSSSSSSSSSSSSSSSSSSSpidSSpidSpidSSpidermpidermpidepidepidepidermpidermrmrmermermSpidermSpidermSpidermites
Spider mites suck fl uid
out of the plants cells
killing tiny areas of leaf
tissue. This causes leaves
to appear fl ecked with
pale dots. They also
cover leaves, shoots, or
fl owers with large amounts
of fi ne webbing. Heavy
infestations can slow plant
growth, cause leaves or
fruit to drop prematurely.
Applications of miticides
will help control spider
mite infestations.
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Tree and Shrub InsectsWhere Personal Service is Always in Season....
Tent CatTeTeTTTeTeTent Cant Cant Cnt Cnt Cnt Cnt Catnt Cant CaTent CatTent CatTent Caterpillars
Tent Caterpillars feed on
deciduous trees throughout
the U.S. Adults are hairy,
medium-sized moths, usually
dull brown, yellow, or gray
in color. Tent caterpillars
overwinter in eggs that are
gray to brown in color. The
eggs laid encircling small
twigs or a fl at mass on bark.
The larvae hatch and begin
feeding on the leaves.
The silken webs are formed
around the juncture of
branches. Pruning out the
infected branches and the
use of high-pressure
insecticide sprays will help
with the control.
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