Title: Oklahoma Master Gardeners
1Oklahoma Master Gardeners
- Basic Entomology
- for the Home and Landscape
Tom A. Royer Entomology and Plant Pathology
Oklahoma State University
2MG Questions and Answers
- How can I manage insect pests without
insecticides? - How do I stop ants from getting in my house?
- Do some plants repel mosquitoes?
- Why doesnt this insecticide work?
?
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3Keys to Insect Management
Know your landscape
Know your tools for control
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4Know Your Landscape
- Preemptive gardening, which includes selecting
plant material, site identification, smart
landscaping proper fertility, watering, and
overall good horticultural practices is a good
first step in keeping many problems from ever
occurring.
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5Know Your Landscape
- Some insects are commonly associated with certain
plants
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6Know Your Landscape
- Some of these close associations create a
nuisance for the home or landscape
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7Know Your Landscape
- Location of plant materials in the landscape can
affect potential pest problems
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8Know Your Adversary
- Proper ID
- Associate injury symptoms with pest
- Proper selection of control measure
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9Know Your Adversary
Phylum Arthropoda (ahr thro pod a)
- The most abundant, diverse life form on the
planet (3/4 of the known animal species). - Our chief competitor for food, and are a major
source of potential health problems and annoyance - Most are NOT a problem for us.
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10Know Your Adversary
Arthropods
- Skeleton on the outside of the body
- Distinct body segmentation
- Paired, jointed appendages
- Dorsal, tubular heart valves
- Double, ventral nerve chord
- Open circulatory system
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11Know Your Adversary
Classes of Arthropods
- Malacostraca (crayfish, lobsters, sowbugs
pillbugs - Arachnidia (spiders, mites, ticks, scorpions)
- Chilopoda (centipedes)
- Diplopoda (millipedes)
- Insecta (true bugs, beetles, butterflies, wasps,
fleas, grasshoppers silverfish, etc.)
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12Know Your Adversary
Class Arachnidia (a-rach-nid-a)
Mite
Harvestman
- Two body regions
- No antennae, never winged
- 4 pairs of legs
Scorpion
Tick
Spider
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13Know Your Adversary
Class Chilopoda (chi lo po da) Centipedes
- Two main body regions
- laterally flattened
- 30 to 340 legs (1 pairper body segment)
- one pair antennae
- predaceous, can be venomous
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14Know Your Adversary
Class Diplopoda (dip lo po da) Millipedes
- two body regions
- body generally rounded
- one pair of antennae
- 80-400 legs (2 pair per apparent body segment)
- feed on decaying organic matter
- often coil when disturbed
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15Know Your Adversary
Class Insecta (in sec ta)
- Beetles, wasps, butterflies, cicadas,
grasshoppers, roaches
- Three body regions
- Three pair of legs
- One pair of antennae
- 0, 1 or 2 pair of wings
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16Know Your Adversary
The insect body is made of a substance called
chitin It must be shed for the insect to grow
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17Insect Growth
- Metamorphosis
- The series of changes that an insect passes in
its growth from egg to adult. Growth is
accomplished by shedding its exoskeleton through
a process known as ecdyisis. Each molt allows
the insect to get bigger and mature into an
adult. It may reduce competition between young
and adult for food, shelter (eat us out of house
and home)
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18Insect Growth
- Ametabolous Growth
- Increase in size,but no changes in
characteristics of the insect
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19Insect Growth
- Ametabolous Growth
- Protura (Proturans)
- Diplura (Diplurans)
- Thysanura (Silverfish)
- Colembola (Springtails)
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20Insect Growth
- Simple (Gradual) Metamorphosis
- Three life stages (egg, nymph, adult)
- Change in size, and addition of adult structures,
such as reproductive organs, wings.
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21Insect Growth
- Orthoptera (Grasshoppers Roaches, Walkingsticks,
Mantids) - Isoptera (Termites)
- Dermaptera (Earwigs)
- Psocoptera (Booklice)
- Zoraptera (Angelwings)
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22Insect Growth
- Thysanoptera (Thrips)
- Mallophaga (Chewing Lice)
- Anoplura (Lice)
- Hemiptera (True Bugs)
- Homoptera
- (Aphids, Scales, Leafhoppers, Plant Hoppers,
Whiteflies)
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23Insect Growth
- Simple (Incomplete) Metamorphosis
- Three life stages (egg, naiad, adult)
- Immature stage is aquatic
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24Insect Growth
- Incomplete Metamorphosis
- Ephemeroptera (Mayfly)
- Odonata (Dragonfly)
- Plecoptera (Stonefly)
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25Insect Growth
- Complete Metamorphosis
- Four life stages (egg, larva, pupa, adult)
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26Insect Growth
- Complete Metamorphosis
- Neuroptera (Lacewings)
- Coleoptera (Beetles)
- Mecoptera (Scorpionfly)
- Lepidoptera (Butterfly)
- Diptera (True Fly)
- Siphonaptera (Flea)
- Hymenoptera (Ants, Bees, Wasps)
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27Know Your Adversary
- Insects can be grouped into orders quite easily
with a bit of practice. Key in on the following - Wing type and number
- Mouthpart
- Type of development
- Other body structures (legs, antennae etc..)
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28Insect Mouthparts
Chewing
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29Insect Mouthparts
Chewing-lapping Sponging
Honeybee
House fly
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30Insect Mouthparts
Piercing-sucking
Leafhopper
Stable Fly
Mosquito
Flea
Louse
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31Insect Mouthparts
Siphoning Rasping
Butterfly
Thrips
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32Insect Wings
Grasshopper
True bug
Thrips
Beetle
Wasp
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33Other Body Parts
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34Other Body Parts
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35Major Groups of Insects
Complete metamorphosis Chewing mouthparts Hardened
wing covers on adults, antennae are various
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36Major Groups of Insects
- Diptera - Flies, gnats, mosquitoes
Complete metamorphosis Mouthparts various 1 pair
of wings, membranous
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37Major Groups of Insects
Gradual metamorphosis Piercing-sucking
mouthparts 2 pair wings with outer ones half
membranous and half leathery
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38Major Groups of Insects
- Hymenoptera - Ants, bees, wasps
Complete metamorphosis Chewing mouthparts Membrano
us wings
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39Major Groups of Insects
- Lepidoptera - Butterflies, moths, skippers
Complete metamorphosis Siphoning mouthparts
(adult) chewing mouthparts (larva) 2 pair wings
with colored scales
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40Major Groups of Insects
- Orthoptera - Grasshopper, cricket, praying mantis
walkingstick, cockroach
Gradual metamorphosis Chewing mouthparts Outer
wings leathery, inner ones membranous
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41Major Groups of Insects
- Neuroptera - Lacewings, antlions, snakeflies
mantispids, dobsonfly alderfly
Complete metamorphosis Chewing mouthparts
(adults) piercing mouthparts (larva) Wings
clear, or colored Most are predaceous
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42Major Groups of Insects
- Homoptera - Aphids, scales, whiteflies,
leafhoppers cicadas
Gradual metamorphosis Piercing/sucking
mouthparts 2 pair clear wings, some wingless Some
reproduce without male
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43Major Groups of Insects
Gradual metamorphosis Rasping/sucking
mouthparts 2 pair of wings feathery
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44Know Your Enemy
- Proper ID
- Associate injury symptoms with pest
- Proper selection of control measure
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45Relate Damage to Insect
Internal
External
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46Relate Damage to Insect
- Damage from Piercing-Sucking Feeders
Discoloration
Wilting
Distorted Growth
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47Relate Damage to Insect
Flower
Leaf
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48Know Your IPM Tools for Control
- Cultural Control
- Biological Control
- Monitoring Tools
- Chemical Control
- Variety selection
- Sanitation
- Placing plants in proper shading in landscape
- Water management
- Pre-inspection of plants before purchase
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49Know IPM Your Tools for Control
- Cultural Control
- Biological Control
- Monitoring Tools
- Chemical Control
- Insect predators
- Insect Parasitoids
- Nematodes
- Insect diseases
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50Biological Control Predators and Parasitoids
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51Biological Control Predators
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52Biological Control Parasitoids
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53Biological Control Nematodes
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54Biological Control Diseases
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55Know IPM Your Tools for Control
- Cultural Control
- Biological Control
- Monitoring Tools
- Chemical Control
- Pheromone traps
- Light traps
- Sticky tape
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56Know IPM Your Tools for Control
- Cultural Control
- Biological Control
- Monitoring Tools
- Chemical Control
- Broad Spectrum Insecticides
- Insect Growth Regulators
- Systemic insecticides
- Botanical Insecticides
- Insecticidal soaps
- Dormant oils
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57Most Wanted(Ornamental Insect Pests)
- Order Homoptera
- Gradual metamorphosis
- Piercing-sucking
- DS nymph, adult
- OW as eggs, adults.
- Host all kinds of plants, shrubs and trees, they
can transmit virus diseases, make galls
Aphids
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58Most Wanted(Ornamental Insect Pests)
- Can cause yellowing, stunting, wilting
- Controls
- Natural enemies
- Stream of water
- Soaps
- Oils
- Insecticides (Azadiractin, pymetrozine)
Aphids
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59Most Wanted(Ornamental Insect Pests)
- Order Lepidoptera
- Complete metamorphosis
- Chewing
- DS larva
- OW as eggs in female bags
- Host cedar, juniper, arborvitae (and 125 other
plants)
Bagworm
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60Most Wanted(Ornamental Insect Pests)
- Can cause long-lasting damage to evergreens
- Controls
- Hand picking bags
- They are susceptible to natural enemies
- Bt sprays, timed with emergence from bag
Bagworm
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61Most Wanted(Ornamental Insect Pests)
- Order Lepidoptera
- Complete metamorphosis
- Chewing
- DS larva
- OW as eggs, hatch as leaves emerge (March)
- Host Crabapple, hawthorn, plum
Eastern Tent Caterpillar
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62Most Wanted(Ornamental Insect Pests)
- Can defoliate, keep leaves from emerging
- Controls
- Prune/destroy egg masses
- Monitor egg hatch at bud break, look for silken
tents, or caterpillars - Insecticides (Bt, spinosad insecticidal soap)
Forest Tent Caterpillar
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63Most Wanted(Ornamental Insect Pests)
- Order Coleoptera
- Complete metamorphosis
- Chewing
- DS Adult, larva
- OW larvae
- Host elm, transmit Dutch elm disease
Smaller European Elm BarkBeetle
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64Most Wanted(Ornamental Insect Pests)
- Life cycle completed in 30-45 days. Adults
emerge in spring, begin flying in April. - First generation begins flying in June. Adults
feed on tree crotches of 2-4 year old limbs, can
transmit Dutch Elm disease. - Second begins flying in August, most go into
diapause. - Some continue to develop into a partial third
generation. - Second and third generations do not usually
transmit disease
Smaller European Elm BarkBeetle
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65Most Wanted(Ornamental Insect Pests)
- Galleries run with grain
- Diseased foliage wilts, turns yellow, then brown,
then dies. - Eradicant pruning (early detection)
- Siberian elm
- Chemical Injections (trained arborist only)
Smaller European Elm BarkBeetle
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66Ornamental Insect Management
- Smaller European elm bark beetle
- Dutch Elm Resistant American Elm Clones
- New Harmony, Valley Forge are commercially
available, released by US National Arboretum. - American Liberty developed by Elm Research
Institute in New Hampshire. Available through
them _at_ http//www.libertyelm.com - or 1-800 FOR ELMS.
- Not available to retail nurseries only to
individuals and non-profit nurseries.
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67Most Wanted(Ornamental Insect Pests)
- Order Acraridinia
- Larva, nymph, adult
- Sucking
- DS larva, adult
- OW eggs, adults
- Tetranychid, Eriophyid
- Host many, some free ranging, others specific
Mites
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68Most Wanted(Ornamental Insect Pests)
- Some cool season, others warm season.
- Monitor with white paper, dislodge with stream of
water - Miticides, may have to make two applications
unless it is an ovicide/miticide.
Mites
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69Most Wanted(Ornamental Insect Pests)
- Order Coleoptera
- Complete metamorphosis
- Chewing
- DS larva, adult
- OW as adult, 2-3 generations/year
- Host Siberian, American, other elms
Elm Leaf beetle
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70Most Wanted(Ornamental Insect Pests)
- Adults cause shotholes, larva skeletonize leaves
- Ulmus parvifolia is somewhat resistant
- Chemical azadirachtin, Bt var. tenebrionis,
spinosad.
Elm Leaf beetle
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71Most Wanted(Ornamental Insect Pests)
- Order Homoptera
- Gradual metamorphosis
- Piercing-sucking
- DS nymph, adult
- OW as eggs, nymphs, females
- Lay eggs at different times during year.
- Host Many plants
Scales
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72Shade Tree Insect Management
- Scales (Order Homoptera)
- Soft (Family Coccidae)
- Armored (Family Diaspidae)
- Related to aphids
- Produce a waxy covering for protection
- Are often immobile on plant
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73Shade Tree Insect Management
- Soft Scales (Brown Elm)
- Female is brown with smooth, hemispherical shape
1/8 to 1/4 inch in diameter. - Eggs laid beneath body of the female in late
April. - Eggs hatch, crawlers emerge, migrate to leaves
and small limbs. - Move back from leaves before they drop, OW as
second instar nymphs. - Adult males find females and mate, but do not
feed. - One generation per year.
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74Shade Tree Insect Management
- Soft Scales (Brown Elm)
- Found on many trees, including ash, mulberry,
plum, pecan, maple and especially American elm. - Can kill small branches, stunt tree growth,
weaken tree, making it susceptible to attack by
disease and borers. - Produces honeydew, can damage cars that are
parked under heavily infested tree.
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75Shade Tree Insect Management
- Armored Scale (Euonymous)
- Attacks many species of Euonymous, occasional
pest of camellia, ivy, hibiscus, holly and
others. - Yellowish, or whitish spots on leaves. Females
are usually found along the stem and leaf veins. - May cause premature leaf drop. Can kill plant if
not controlled.
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76Shade Tree Insect Management
- They have numerous natural enemies
- Chemical dormant oils, summer oils, Insect
growth regulators (pyroproxifen)
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77Most Wanted(Ornamental Insect Pests)
- Order Lepidoptera
- Complete metamorphosis
- Chewing
- DS larva
- 2 generations, 2 races
- Host Pecan, persimmon, walnut, crabapple and
others (84 other species
Fall webworm
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78Most Wanted(Ornamental Insect Pests)
- Unsightly, but not permanently damaging, because
damage occurs primarily in fall. - Prune
- Chemical (Bt, spinosad diflubenzuron)
Fall webworm
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79Most Wanted(Ornamental Insect Pests)
- Order Homoptera
- Gradual metamorphosis
- Piercing-sucking
- DS nymph, adult
- Feed on new growth
- Host many plants (ficus,philodendron coleus),
more of a problem in interiorscapes
Mealybug
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80Most Wanted(Ornamental Insect Pests)
- Need to watch for this introduced species
(Florida) not controllable with insecticide. - Mealybugs generally are controllable with alcohol
spray, horticultural oil, or insecticidal soap.
Pink Hibiscus Mealybug
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81Most Wanted(Ornamental Insect Pests)
- Order Hemiptera
- Gradual metamorphosis
- Piercing-sucking
- DS nymph, adult
- OW eggs, adults
- Host many trees, sycamore, hawthorn, honey
locust, azalea, elm, oak, others.
Lace bug
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82Most Wanted(Ornamental Insect Pests)
- Nymphs feed on new leaves, causing yellowing,
browning of leaves. Plant just looks sick. - Control with (azadirachtin, horticultural oil,
insecticidal soap)
Lace bug
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83Most Wanted(Ornamental Insect Pests)
- Order Coleoptera, Lepidoptera
- Complete metamorphosis
- Chewing
- DS larva
- OW as larvae
- Host many trees
Borers
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84Most Wanted(Ornamental Insect Pests)
- Roundheaded borers
- Have 1-several year lifecycle, depending on
species. Pine sawyers have 2-2 ½ generations per
year. - Adults emerge in spring or fall, lay eggs in bark
crevices or feeding notches that the adult
creates. - Some produce sawdust that is a sign of borer
damage. Holes are irregular in spacing on the
tree. - Some species are attracted to cut wood, others to
living trees, but they are often more attracted
to weakened, stressed trees.
Borers
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85Most Wanted(Ornamental Insect Pests)
- Flatheaded borers
- Buprestidae. Adults shiny, often metallic or
brightly colored, wedge-shaped beetle. Also
called metallic wood borers. - Antennae are not as long as body. Can measure
from 1/3 to nearly 1 inch long. - Larva creamy white to yellow, with a prominent
swollen, flattened area just behind the
mouthparts.
Borers
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86Most Wanted(Ornamental Insect Pests)
- Clearwing borers
- Adult moths are wasp-like, clear wings, may have
orange markings on body. Active during the
daytime. - Larvae 1 inch, creamy white with shiny brown
head.
Borers
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87Most Wanted(Ornamental Insect Pests)
Keep trees healthy
Well timed residual insecticide spray
Borers
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88Most Wanted(Ornamental Insect Pests)
- Order Hemiptera
- Gradual metamorphosis
- Piercing-sucking
- OW as adults
- Host Boxelder, maple chinaberry, soapberry
Golden raintree. - Mainly a nuisance
Boxelder bug Redshouldered bug
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89Most Wanted(Ornamental Insect Pests)
- Seek shelter in undergrowth beneath trees
- Avoid planting host trees
- Plant male boxelder tree
- Spray infested trees during summer (immature
stages) - Caulk, spray congregating bugs with high
phosphate detergents - Vacuum
Boxelder bug Redshouldered bug
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90Most Wanted(Household Insect Pests)
- Order Hymenoptera
- Complete metamorphosis
- OW in colony
- Many species are pest/nuisance
- Social insects, controls must keep that in mind
Ants
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91Most Wanted(Household Insect Pests)
- Carpenter ants dont eat wood, just carve out for
nest - Trim trees that are contacting house.
- Inspect thoroughly, especially areas that can
retain moisture - Chemical controls are numerous, but require
locating main nest as well
Carpenter Ants
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92Most Wanted(Household Insect Pests)
- Order Hymenoptera
- Complete metamorphosis
- DS Adult worker swarms
- OW as females in hive
- Tend to swarm when they build up enough numbers
- Africanized bees are the hot topic, now have been
found in Oklahoma.
Honey bees
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93Most Wanted(Household Insect Pests)
- Africanized have been found in Oklahoma,
- If you encounter a suspected AHB colony or swarm
in counties other than listed on the map - Call Doug Dear 405-205-2699
- or Don Molnar 580-614-1035
- to get a sample to send to OSU for DNA testing.
Africanized Honey bees
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94Most Wanted(Household Insect Pests)
- Class Arachnidia
- Piercing chelicera
- OW eggs, adults
- Venomous
Spiders
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95Most Wanted(Household Insect Pests)
- Common in OK
- Bite can cause severe problems, but some people
react differently than others. - Clean up CLUTTER!
- Glue boards, residual insecticides.
Spiders
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96Most Wanted(Household Insect Pests)
- Common
- Like quiet, dark hidden areas
- Control with sanitation, exclusion of dwelling.
- Dusts are better because they cling to web.
Spiders
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97Most Wanted(Household Insect Pests)
- Order Hymenoptera
- Complete metamorphosis
- DS Adult
- OW as females in old nests
- Drill into wood, laying eggs.
Carpenter Bee
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98Most Wanted(Household Insect Pests)
- Paint, stain, shellac, varnish can reduce
infestations. - Dust or spray nest entrances, keep open for
several days, then plug with a dowel. - Chemical many, apply at night when they are not
active.
Carpenter Bee
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99Most Wanted(Household Insect Pests)
- Order Diptera
- Complete metamorphosis
- Piercing-sucking
- OW adult, egg
- DS Adult
- Feed on blood, transmit disease, including W Nile
virus.
Mosquitos
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100Most Wanted(Household Insect Pests)
- Personal protection (deet, or another repellent)
- Remove any containers that can hold standing
water for long periods of time - Chemical mosquito dunks (Bt israelensis)for
temporary flood waters.
Mosquitos
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101Most Wanted(Household Insect Pests)
- Order Isoptera
- Gradual metamorphosis
- Chewing
- DS nymphs, adults
- Feed on wood, have internal flagellated protozoa
that help them digest wood
Termites
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102Most Wanted(Household Insect Pests)
- Very damaging to structures, even living trees.
- USE PROFESSIONAL PEST CONTROL SPECIALIST
- Baiting stations, fipronyl.
Termites
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103Most Wanted(Household Insect Pests)
- Class Arachnidia
- Piercing-sucking
- egg, larva, nymph adult.
- DS all, depending on species
- Transmit disease, etc
Ticks
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104Most Wanted(Household Insect Pests)
- American dog tick, Lone star tick, black legged
tick. - These are 3-host ticks ie they use a different
host for each molt.
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105Most Wanted(Household Insect Pests)
- Lyme disease Rocky Mountain Spotted Fever, tick
typhus, ehrlichiosis and babesiosis. - Personal protection, including tight fitting
clothes, repellents. - Mow grass, limit pet access to tick areas.
Chemicals many.
Tick
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106Most Wanted(Household Insect Pests)
- Order Hymenoptera
- Complete metamorphosis
- Chewing
- DS Adult
- OW female
- Build huge nests, can cause serious health
problems.
Wasps and Hornets
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107Most Wanted(Household Insect Pests)
- German yellowjacket does not make ground nests,
will build nests in wall voids etc. They can
cause problems to homeowners. - Easterns are not nearly as indiscriminating.
Wasps and Hornets
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108Most Wanted(Vegetable Insect Pests)
- Order Coleoptera
- Complete metamorphosis
- Chewing
- DS Adult/Larva
- OW Adult in soil
- Host potato, tomato, eggplant others.
Colorado potato beetle
Oklahoma State University
109Most Wanted(Vegetable Insect Pests)
- Hand picking in small areas
- They have some natural enemies such as predatory
stink bugs. - Chemical (Bt tenebrionis, spinosad, imidacloprid)
Colorado potato beetle
Oklahoma State University
110Most Wanted(Vegetable Insect Pests)
- Order Coleoptera
- Complete
- Chewing
- DS Adult/Larva
- OW Unmated adults
- Host cucumbers, other cucurbits.
Spotted cucumber beetle
Oklahoma State University
111Most Wanted(Vegetable Insect Pests)
- Adults kill seedling plants if numbers are large
enough. Larvae feed on roots, fruits in contact
with ground - Transmits bacterial wilt of curcurbits.
- Row covers, delayed planting help.
- Chemical (apply early and maybe, often)
Striped cucumber beetle
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112Most Wanted(Vegetable Insect Pests)
- Order Lepidoptera
- Complete metamorphosis
- Chewing
- DS Larva
- OW pupa
- Host tomato, eggplant, pepper.
Hornworm
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113Most Wanted(Vegetable Insect Pests)
- Adult is hawk moth, or sphinx moth. Many
species, most are not pests.
Hornworm
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114Most Wanted(Vegetable Insect Pests)
- Look for feeding signs
- Frass solid larval excrement aka INSECT POOP!
Hornworm
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115Most Wanted(Vegetable Insect Pests)
- Hornworms are susceptible to natural enemies.
- Hand picking
- Fishing
- Chemical (Bt, spinosad)
Hornworm
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116Most Wanted(Vegetable Insect Pests)
- Order Lepidoptera
- Complete metamorphosis
- Chewing
- DS Larva
- OW pupa in cocoon
- Host cabbage, lettuce, spinach, beet, potato,
tomato - 3-4 generations. Numbers tend to build as season
progresses.
Cabbage looper
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117Most Wanted(Vegetable Insect Pests)
- Feed on lower leaves, often underneath them.
- Cabbage can tolerate feeding until cupping stage
- LOTS of natural enemies
- Chemical control (Bt, spinosad)
Cabbage looper
Oklahoma State University
118Most Wanted(Vegetable Insect Pests)
- Order Hemiptera
- Gradual metamorphosis
- Sucking
- DS Adult/nymph
- OW unmated adults
- All cucurbits, especially squash, pumpkin.
Squash bug
Oklahoma State University
119Most Wanted(Vegetable Insect Pests)
- Overwintering adults mate, and move into
preferred food plants. - Colonize crops in spring, build up as crop is
planted later. - Feeding adults and nymphs insect toxic saliva
that causes brown, dead vines.
Squash bug
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120Most Wanted(Vegetable Insect Pests)
- Look for egg laying activity, one method of
control is to squash the squash bug eggs. - Put out plywood boards around infested area, bugs
will spend night underneath board. - Chemical controls need to be targeted to nymphs
(the younger the better)
Squash bug
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121Master Gardener Diplomacy (Insect Management)
- Before making recommendations
- Find out WHY your client gardens
- Create an atmosphere of enjoyment and learning
- Ask lots of questions about the situation
(DETAILS) - Try not to treat insect management as a CHORE
but as a necessary challenge.
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