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Household Invaders Associated with Landscapes. Dr. David Shetlar (the BugDoc) The Ohio State University/OARDC OSU Extension Columbus, OH. © D.J. Shetlar, 2002, all rights reserved. Why are household invaders associated with landscapes?. Landscapes provide the 3 essentials!. Food Water

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slide1

Household Invaders Associated with Landscapes

Dr. David Shetlar (the BugDoc)

The Ohio State University/OARDC

OSU Extension

Columbus, OH

© D.J. Shetlar, 2002, all rights reserved

slide2

Why are household invaders associated with landscapes?

Landscapes provide the 3 essentials!

  • Food
  • Water
  • Habitat (nesting, hiding, protection)

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slide3

Pests "Associated" with Landscapes

Earwigs

Soldier Beetles

Ground Beetles

Millipedes

Sowbugs-Pillbugs

Slugs & Snails

Spiders

Clover Mites

Artillary fungus

Ground Nesting Wasps

Ants, ground nesting

Ants, carpenter & cavity

Fleas

Ticks

Pine leaf-footed bugs

Boxelder bugs

Moles, voles and shrews

MC Asian lady beetle

slide4

Earwigs,

Soldier & Ground Beetles

Generally, predators

Aggravated by:

mulch and irrigation

aphids, mealybugs, scales

slide5

Striped earwig male.

European earwig female and egg mass (under landscape timber).

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slide6

Ground beetle adult, a general predator.

Ground beetle larvae are also predators.

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slide7

Millipedes, Centipedes,

& Sowbugs-Pillbugs

Feed on young plants, clippings & fungi, centipedes are predators

Aggravated by:

Too much mulch

Irrigation

Fresh clippings or compost

slide8

Millipede (Diplopoda)

Centipede (Chilopoda)

Sowbug, pillbug (Isopoda)

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slide9

Spiders

Feed on insects and other arthropods

Aggravated by:

mulch & irrigation

tall vegetation

night lights

landscape stones, timbers, etc.

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slide10

Jumping spiders are common landscape “stalking” predators which may end up inside buildings.

Wolf spiders also stalk their prey. Males commonly invade buildings in late summer while looking for mates.

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slide11

Brown recluse spiders prefer undisturbed habitat, especially cavities under bark of fire wood.

Widow spiders commonly build their tangle webs around night lights.

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slide12

Slugs & Snails

Feed on young/soft plants & clippings

Aggravated by:

mulch & irrigation

thick lawns with thatch

hosta

slide13

Common garden slug and egg mass under landscape timber.

Snails in landscapes generally need soft plant tissues and moisture.

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slide14

Clover Mites

Feed on grasses & some plants

Aggravated by:

mild winter temperatures

cool spring or fall temperatures

thick turf next to home

slide15

Adult mite on grass blade.

Clover mites laying eggs under irrigation switch box case.

Clover mites on masking tape from basement wall!

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slide16

Ground Nesting Wasps

General predators and scavangers

Aggravated by:

thick mulch

ground covers

low junipers

bare ground (solitary wasps)

slide17

German yellowjacket nest entrance in blue rug juniper.

Contents of German yellowjacket nest in above juniper.

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slide18

European hornets feeding on old apples in a back yard.

Polistes wasp chewing up a cutworm larva to take back to nest.

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slide19

Ants, Ground Nesting

General scavengers & honeydew

Aggravated by

aphids & scales

open areas (thin turf)

slide20

Cornfield ants swarming on landscape timbers. Home owner thought they were termites!

Pavement ant colonies commonly battle each other.

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slide21

Fire ants commonly defend honeydew produces like these pine tortoise scales.

Fire ants can also be considered beneficial when they kill and eat other insects like this mole cricket.

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slide22

Ants, Carpenter

General feeders

Associated with tree rots

Properly prune trees

NO TOPPING!!

Keep tree branches from house

Reduce honeydew producers

slide23

Black carpenter ants taking sugars from Peony nectaries.

Irrigation cover in FL lawn.

Carpenter ant colony under cover.

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slide24

Fleas & Ticks

Parasites associated with animals

Aggravated by:

Mulched pet sleeping areas

Xeriscaped yards

Weedy areas, low shrubs

Ground covers with mice or voles

slide26

American dog tick male

Blacklegged (deer) tick female

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slide27

Fleas often infest landscape areas where pets rest (mulch areas!) or other vermin are encouraged.

Roof rat feeding in bird feeder!

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slide28

Most home owners are unaware of where mosquitoes come from.

Mosquito larvae can breed in water that collects in plant cavities, but they can certainly utilize backyard “water decorations.”

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slide29

Boxelder &

Pine Leaf-footed Bugs

Feed on seeds of host trees

Remove boxelder, especially females

Remove Scotch and pitch pines

"Seal" homes

slide30

Boxelder bugs seem to prefer boxelder trees, but they can easily breed on maples and ashes!

The pine leaffooted bugs feed on seed cones of pines.

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slide31

Most people have been “indoctrinated” to believe that moles mean white grubs. The number one food of moles is EARTHWORMS!

Voles (meadow mice) need varied habitat for food. The prefer herbaceous weeds, tall, thatchy turf and MULCH.

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slide32

Moles, Voles and Shrews

Voles are herbivores

encouraged by ground covers

and high cut turf

Moles & Shrews are insectivores

encouraged by insects (grubs)

moles feed on earthworms!

slide33

Recommendations for Managing Household Invaders

Remember the 3 essentials!

  • Food
  • Water
  • Habitat (nesting, hiding, protection)

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slide35

Insect tally from ONE bird-of-paradise

tree stalk Naples, FL

  • Ghost ant colonies (sub colonies?) (4, one per each spent flower cluster)
  • Bigheaded ant colonies (sub colonies?) (14, at bases of older leaves)
  • Florida carpenter ants (sub colonies) (5, mainly in bases of cut leaves)
  • Acrobat ants (about 40 ants on leaves, but no colony located)
  • Smoky brown roaches (5 adults and 27 nymphs, scattered among leaf base cavities)

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slide37

Reducing Food of Invaders

  • Watch for honeydew producers on landscape plants (aphids, soft scales, mealybugs, leafhoppers, etc.)
  • Recommend replacing landscape plants that are prone to infestation by honeydew producers.
  • Recommend mulches that are not fungal food – hardwood mulches!

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slide38

Reducing Water

  • Audit irrigation systems! (reschedule, repair, etc.)
  • Locate condenser drip tubes & redirect
  • Inspect roof downspouts & redirect
  • Reduce Mulch Thickness!
  • Note hazards of backyard water ponds!

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slide39

Reducing Habitat of Invaders

  • Avoid cavity prone plants – palms, bird-of paradise tree, poorly pruned (topped) trees, etc.
  • Avoid dense ground covers – especially prostrate junipers.
  • Recommend “open pruning” of landscape plants.
  • AVOID THICK LAYERS OF MULCH!

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slide40

Additional Information Resource -

Come visit the BugDoc at:

http://bugs.osu.edu

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