cockroaches & ants - oh my! david j. shetlar, ph.d. the “bugdoc” the ohio state university,...
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Cockroaches & Ants - Oh My!
David J. Shetlar, Ph.D.The “BugDoc”
The Ohio State University, OARDC & OSU Extension
Columbus, OH
© July, 2002, D.J. Shetlar, all rights reserved
What are BUGS?
“Bugs” to the average person means “many-legged” critters! Most “bugs” are ARTHROPODS of some kind (includes insects, spiders & ticks, millipedes & centipedes, sowbugs, etc.)
True bugs are insects in the order Hemiptera! (plant bugs, lace bugs, stink bugs, etc.)
Most “Bugs” are HARMLESS!
Characteristics of the PhylumArthropoda
The segmented bodies are arranged into regions, called tagmata (e.g., head, thorax, abdomen).
The paired appendages (e.g., legs, antennae) are jointed.
They posses a chitinous exoskeletion that must be shed during growth.
They have bilateral symmetry.
The nervous system is dorsal (belly) (brain is “hard wired” – little ability to change); and the circulatory system is open and ventral (back).
Arthropod Groups (taxa)
The arthropods are divided into two large groups that exist today:
The Chelicerates
and
The Mandibulates
Orders of Arachnids
Scorpionida - scorpions
Pseudoscorpionida - false scorpions
Phalangida - daddy-long-legs or harvestmen
Acari - mites & ticks
Araneida - spiders
pedipalps &chelicerae
cephalothorax
abdomen
Mite and Tick Body Regions
American dog tick male
Blacklegged (deer) tick female
pedipalp
chelicera (fang)
cephalothorax
abdomen
narrow waist
Spider Anatomy
Abdomen
Pedipalp
Chelicera (fang)
Cephalothorax
Jumping Spider
Myriapods
Millipede (Diplopoda)
Two pair of legs per visible segment, attached under body.
Centipede (Chilopoda)
Pair of fangs under head, one pair legs per visible segment - attached to side of body.
[one pair of antennae, head & trunk regions, trunk with many pairs of legs]
Millipede (Diplopoda)
Centipede (Chilopoda)
Classes of Crustacea(mostly marine, fresh water, a few terrestrial)
(all have two pair of antennae, five or more pairs of legs, segmented abdominal appendages, head & trunk or
cephalothorax & abdomen body arrangement, have gills)
Isopoda - sowbugs or pillbugs
Amphipoda - sand fleas, amphipods
Cirripedia - barnicles
Decapoda - crabs, lobster, shrimp
several other minor orders
Crayfish cephalothorax(Decapoda)
Sowbug (Isopoda), a terrestrial crustacean
Class Insecta(all have one pair of antennae, a head, thorax &
abdominal regions, three pair of legs, adults usually have wings, use trachea)
Life Cycle Groups
Incomplete - egg, nymph, adult stages
Complete - egg, larva, pupa, adult stages
Incomplete Life Cycle Example(hairy chinch bug)
egg 1st 2nd 3rd 4th 5th shortwing normal wing instar instar instar instar instar adult adult
Egg Nymphal AdultStage Stage Stage
Complete Life Cycle Example(northern masked chafer)
egg 1st 2nd 3rd pupa adult instar instar instar
Egg Larval Pupal AdultStage Stage Stage Stage
Cockroaches
Ancient group (survivors!)
Incomplete life cycle (eggs in cases)
Omnivores (eat almost any food)
Anthropomorphic species (tropical & subtropical species that live in the “comfort” of human buildings)
Cockroaches
Watch out for names!• “Roach” or “Cockroach” (often
unacceptable to have!)
• “Waterbugs” (everyone has ‘em!)
Cockroach Species
German Brownbanded American Oriental (=waterbug)
Domestic Ohio Species
Native Species Woods roach
American Cockroach
Oriental Cockroach(=“waterbug”)
Brownbanded Cockroach
German Cockroach
Cockroach SpeciesSpecies Size Life Span Preferred Habitats
American Large
1.3-2.1
1.5-2.0 yr Needs water, commonly breeds in sewer systems & underground utility systems.
Oriental Medium
1.0-1.3
1.0-3.0 yr Prefers high humidity areas, can withstand freezing temps, often in basements, garages, crawl spaces.
Brownbanded Small
0.5-0.6
90-280 days Can withstand dryer conditions, often lives in electrical equipment, attaches egg cases anywhere.
German Small
0.4-0.6
2-6 months Retains egg case until hatching, needs warmth, & water, often around food processing areas.
Cockroach Management
Monitor (sticky traps, flushing agents, determine extent of population)
Sanitation Exclusion (caulking, parameter sprays)
Crack & Crevice Sprays or Dusts (treat all areas at once)
Baits (eliminate other foods!)
Food Preferences (sugars, oils, or omnivores)
Nesting Habits (soil, tree voids, or building voids)
Worker Types (single - monomorphic - or multiple sizes - polymorphic)
Reproductive Strategy (single or multiple queens)
Nuisance Ants
Common Ohio Ants
Carpenter Ant
Characterized by having polymorphic workers
Nest by excavating decaying wood or voids (they don’t eat the wood, they cast out wood shavings!)
Major nests in trees (satellite nests in buildings where water is available)
Most active at night (best time to find colony(ies) is at night!)
Carpenter Ant Management
Locate nesting site(s) (outside and/or inside - look at night, repair water damaged structures)
Prune back trees and shrubs touching infested building
Seal external entry sites
Exclude with parameter sprays
Treat colonies (injection, dusts) (baiting is rarely successful)
Larger Yellow (Citronella) Ant Odorous House Ant Acrobat Ants Argentine Ant Little Black Ant Pavement Ant Pharaoh Ant Thief Ant
Common Ohio AntsHouse & Building Invaders
Ant Management
Identify species!
Locate nesting site (outside and/or inside)
Prune back trees and shrubs touching infested building
Seal external entry sites
Exclude with parameter sprays
Select appropriate bait
Treat colonies (injection, dusts, baits)
Household Related Parasites
Fleas
Ticks
Lice (head, body, pubic)
Mosquitoes
No-see-ums (ceratopogonids)
Bird mites
Fleas
Cat, dog & rat fleas are most commonly found (cat flea is, by far, the most common on dogs and cats!)
Adults suck blood for food
Eggs drop from host
Flea larvae feed on organic debris & blood excrement from adult fleas
Pupae may remain dormant
Flea Life Cycle
Eggs - 2-14 daysLarvae - 7-60 daysPupae - 5-15 days
Adults - 2-12 monthsfemales - 15-20
eggs/day - 600 total
Flea Control Coordination
Pet
Exterior Interior
Human Lice
Head louse most common (obtained by contact and exchanging clothing, especially hats and head gear)
Body louse very uncommon
Pubic louse fairly common (obtained ONLY by body-to-body contact!)
Mosquitoes
Many species involved
Larvae grow in temporary pools of water (from acres of wet fields to tiny tree holes and roadside cans, old tires, or trash)
May require area treatments