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Title: Oklahoma Master Gardeners


1
Oklahoma Master Gardeners
  • Basic Entomology
  • for the Home and Landscape

Tom A. Royer Entomology and Plant Pathology
Oklahoma State University
2
MG 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?

?
Oklahoma State University
3
Keys to Insect Management
Know your landscape
  • Know your adversary

Know your tools for control
Oklahoma State University
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Know 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.

Oklahoma State University
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Know Your Landscape
  • Some insects are commonly associated with certain
    plants

Oklahoma State University
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Know Your Landscape
  • Some of these close associations create a
    nuisance for the home or landscape

Oklahoma State University
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Know Your Landscape
  • Location of plant materials in the landscape can
    affect potential pest problems

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Know Your Adversary
  • Why Study BUG Science?
  • Proper ID
  • Associate injury symptoms with pest
  • Proper selection of control measure

Oklahoma State University
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Know 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.

Oklahoma State University
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Know 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

Oklahoma State University
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Know 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.)

Oklahoma State University
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Know Your Adversary
Class Arachnidia (a-rach-nid-a)
Mite
Harvestman
  • Two body regions
  • No antennae, never winged
  • 4 pairs of legs

Scorpion
Tick
Spider
Oklahoma State University
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Know 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

Oklahoma State University
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Know 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

Oklahoma State University
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Know 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

Oklahoma State University
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Know Your Adversary
The insect body is made of a substance called
chitin It must be shed for the insect to grow
Oklahoma State University
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Insect 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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Insect Growth
  • Ametabolous Growth
  • Increase in size,but no changes in
    characteristics of the insect

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Insect Growth
  • Ametabolous Growth
  • Protura (Proturans)
  • Diplura (Diplurans)
  • Thysanura (Silverfish)
  • Colembola (Springtails)

Oklahoma State University
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Insect Growth
  • Simple (Gradual) Metamorphosis
  • Three life stages (egg, nymph, adult)
  • Change in size, and addition of adult structures,
    such as reproductive organs, wings.

Oklahoma State University
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Insect Growth
  • Gradual Metamorphosis
  • Orthoptera (Grasshoppers Roaches, Walkingsticks,
    Mantids)
  • Isoptera (Termites)
  • Dermaptera (Earwigs)
  • Psocoptera (Booklice)
  • Zoraptera (Angelwings)

Oklahoma State University
22
Insect Growth
  • Gradual Metamorphosis
  • Thysanoptera (Thrips)
  • Mallophaga (Chewing Lice)
  • Anoplura (Lice)
  • Hemiptera (True Bugs)
  • Homoptera
  • (Aphids, Scales, Leafhoppers, Plant Hoppers,
    Whiteflies)

Oklahoma State University
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Insect Growth
  • Simple (Incomplete) Metamorphosis
  • Three life stages (egg, naiad, adult)
  • Immature stage is aquatic

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Insect Growth
  • Incomplete Metamorphosis
  • Ephemeroptera (Mayfly)
  • Odonata (Dragonfly)
  • Plecoptera (Stonefly)

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Insect Growth
  • Complete Metamorphosis
  • Four life stages (egg, larva, pupa, adult)

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Insect Growth
  • Complete Metamorphosis
  • Neuroptera (Lacewings)
  • Coleoptera (Beetles)
  • Mecoptera (Scorpionfly)
  • Lepidoptera (Butterfly)
  • Diptera (True Fly)
  • Siphonaptera (Flea)
  • Hymenoptera (Ants, Bees, Wasps)

Oklahoma State University
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Know 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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Insect Mouthparts
Chewing
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Insect Mouthparts
Chewing-lapping Sponging
Honeybee
House fly
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Insect Mouthparts
Piercing-sucking
Leafhopper
Stable Fly
Mosquito
Flea
Louse
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Insect Mouthparts
Siphoning Rasping
Butterfly
Thrips
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Insect Wings
Grasshopper
True bug
Thrips
Beetle
Wasp
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Other Body Parts
  • Antennae

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Other Body Parts
  • Legs

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Major Groups of Insects
  • Coleoptera - Beetles

Complete metamorphosis Chewing mouthparts Hardened
wing covers on adults, antennae are various
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Major Groups of Insects
  • Diptera - Flies, gnats, mosquitoes

Complete metamorphosis Mouthparts various 1 pair
of wings, membranous
Oklahoma State University
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Major Groups of Insects
  • Hemiptera - True bugs

Gradual metamorphosis Piercing-sucking
mouthparts 2 pair wings with outer ones half
membranous and half leathery
Oklahoma State University
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Major Groups of Insects
  • Hymenoptera - Ants, bees, wasps

Complete metamorphosis Chewing mouthparts Membrano
us wings
Oklahoma State University
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Major 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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40
Major Groups of Insects
  • Orthoptera - Grasshopper, cricket, praying mantis
    walkingstick, cockroach

Gradual metamorphosis Chewing mouthparts Outer
wings leathery, inner ones membranous
Oklahoma State University
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Major 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
Oklahoma State University
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Major Groups of Insects
  • Homoptera - Aphids, scales, whiteflies,
    leafhoppers cicadas

Gradual metamorphosis Piercing/sucking
mouthparts 2 pair clear wings, some wingless Some
reproduce without male
Oklahoma State University
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Major Groups of Insects
  • Thysanoptera - thrips

Gradual metamorphosis Rasping/sucking
mouthparts 2 pair of wings feathery
Oklahoma State University
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Know Your Enemy
  • Why Study This Stuff?
  • Proper ID
  • Associate injury symptoms with pest
  • Proper selection of control measure

Oklahoma State University
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Relate Damage to Insect
  • Chewing Damage

Internal
External
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Relate Damage to Insect
  • Damage from Piercing-Sucking Feeders

Discoloration
Wilting
Distorted Growth
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Relate Damage to Insect
  • Rasping Damage

Flower
Leaf
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Know 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

Oklahoma State University
49
Know IPM Your Tools for Control
  • Cultural Control
  • Biological Control
  • Monitoring Tools
  • Chemical Control
  • Insect predators
  • Insect Parasitoids
  • Nematodes
  • Insect diseases

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50
Biological Control Predators and Parasitoids
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Biological Control Predators
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Biological Control Parasitoids
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Biological Control Nematodes
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Biological Control Diseases
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Know IPM Your Tools for Control
  • Cultural Control
  • Biological Control
  • Monitoring Tools
  • Chemical Control
  • Pheromone traps
  • Light traps
  • Sticky tape

Oklahoma State University
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Know 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

Oklahoma State University
57
Most 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
Oklahoma State University
58
Most Wanted(Ornamental Insect Pests)
  • Can cause yellowing, stunting, wilting
  • Controls
  • Natural enemies
  • Stream of water
  • Soaps
  • Oils
  • Insecticides (Azadiractin, pymetrozine)

Aphids
Oklahoma State University
59
Most 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
Oklahoma State University
60
Most 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
Oklahoma State University
61
Most 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
Oklahoma State University
62
Most 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
Oklahoma State University
63
Most Wanted(Ornamental Insect Pests)
  • Order Coleoptera
  • Complete metamorphosis
  • Chewing
  • DS Adult, larva
  • OW larvae
  • Host elm, transmit Dutch elm disease

Smaller European Elm BarkBeetle
Oklahoma State University
64
Most 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
Oklahoma State University
65
Most 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
Oklahoma State University
66
Ornamental 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.

Oklahoma State University
67
Most 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
Oklahoma State University
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Most 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
Oklahoma State University
69
Most 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
Oklahoma State University
70
Most Wanted(Ornamental Insect Pests)
  • Adults cause shotholes, larva skeletonize leaves
  • Ulmus parvifolia is somewhat resistant
  • Chemical azadirachtin, Bt var. tenebrionis,
    spinosad.

Elm Leaf beetle
Oklahoma State University
71
Most 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
Oklahoma State University
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Shade 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

Oklahoma State University
73
Shade 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.

Oklahoma State University
74
Shade 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.

Oklahoma State University
75
Shade 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.

Oklahoma State University
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Shade Tree Insect Management
  • They have numerous natural enemies
  • Chemical dormant oils, summer oils, Insect
    growth regulators (pyroproxifen)

Oklahoma State University
77
Most 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
Oklahoma State University
78
Most Wanted(Ornamental Insect Pests)
  • Unsightly, but not permanently damaging, because
    damage occurs primarily in fall.
  • Prune
  • Chemical (Bt, spinosad diflubenzuron)

Fall webworm
Oklahoma State University
79
Most 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
Oklahoma State University
80
Most 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
Oklahoma State University
81
Most 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
Oklahoma State University
82
Most 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
Oklahoma State University
83
Most Wanted(Ornamental Insect Pests)
  • Order Coleoptera, Lepidoptera
  • Complete metamorphosis
  • Chewing
  • DS larva
  • OW as larvae
  • Host many trees

Borers
Oklahoma State University
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Most 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
Oklahoma State University
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Most 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
Oklahoma State University
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Most 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
Oklahoma State University
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Most Wanted(Ornamental Insect Pests)
Keep trees healthy
Well timed residual insecticide spray
Borers
Oklahoma State University
88
Most 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
Oklahoma State University
89
Most 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
Oklahoma State University
90
Most 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
Oklahoma State University
91
Most 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
Oklahoma State University
92
Most 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
Oklahoma State University
93
Most 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
Oklahoma State University
94
Most Wanted(Household Insect Pests)
  • Class Arachnidia
  • Piercing chelicera
  • OW eggs, adults
  • Venomous

Spiders
Oklahoma State University
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Most 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
Oklahoma State University
96
Most 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
Oklahoma State University
97
Most Wanted(Household Insect Pests)
  • Order Hymenoptera
  • Complete metamorphosis
  • DS Adult
  • OW as females in old nests
  • Drill into wood, laying eggs.

Carpenter Bee
Oklahoma State University
98
Most 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
Oklahoma State University
99
Most 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
Oklahoma State University
100
Most 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
Oklahoma State University
101
Most 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
Oklahoma State University
102
Most Wanted(Household Insect Pests)
  • Very damaging to structures, even living trees.
  • USE PROFESSIONAL PEST CONTROL SPECIALIST
  • Baiting stations, fipronyl.

Termites
Oklahoma State University
103
Most Wanted(Household Insect Pests)
  • Class Arachnidia
  • Piercing-sucking
  • egg, larva, nymph adult.
  • DS all, depending on species
  • Transmit disease, etc

Ticks
Oklahoma State University
104
Most 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.

Oklahoma State University
105
Most 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
Oklahoma State University
106
Most Wanted(Household Insect Pests)
  • Order Hymenoptera
  • Complete metamorphosis
  • Chewing
  • DS Adult
  • OW female
  • Build huge nests, can cause serious health
    problems.

Wasps and Hornets
Oklahoma State University
107
Most 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
Oklahoma State University
108
Most 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
109
Most 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
110
Most Wanted(Vegetable Insect Pests)
  • Order Coleoptera
  • Complete
  • Chewing
  • DS Adult/Larva
  • OW Unmated adults
  • Host cucumbers, other cucurbits.

Spotted cucumber beetle
Oklahoma State University
111
Most 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
Oklahoma State University
112
Most Wanted(Vegetable Insect Pests)
  • Order Lepidoptera
  • Complete metamorphosis
  • Chewing
  • DS Larva
  • OW pupa
  • Host tomato, eggplant, pepper.

Hornworm
Oklahoma State University
113
Most Wanted(Vegetable Insect Pests)
  • Adult is hawk moth, or sphinx moth. Many
    species, most are not pests.

Hornworm
Oklahoma State University
114
Most Wanted(Vegetable Insect Pests)
  • Look for feeding signs
  • Frass solid larval excrement aka INSECT POOP!

Hornworm
Oklahoma State University
115
Most Wanted(Vegetable Insect Pests)
  • Hornworms are susceptible to natural enemies.
  • Hand picking
  • Fishing
  • Chemical (Bt, spinosad)

Hornworm
Oklahoma State University
116
Most 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
Oklahoma State University
117
Most 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
118
Most 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
119
Most 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
Oklahoma State University
120
Most 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
Oklahoma State University
121
Master 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.

Oklahoma State University
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