Concrete sacks corrugated material rodents mice

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concrete, sacks, corrugated material Rodents: Mice Characteristics • Varieties: Mus musculus domestiucus and Mus musculus brevirostris Size: 1-2”, weight: 3/4-1 oz Builds nest from soft materials Do not need water Good climbers and swimmers Fits in a 1/4-1/2” opening Rodents: Mice Characteristics Reach sexual maturity at 1.5 months Produce 5-8 litters/ year, 5-6 offspring per litter 1 pair of mice produce 20,000 droppings/year 1.5 pints urine Cereal or seed eaters, but can eat anything Nibblers, eat every 1-2 hours Eat 15% their body weight
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Rodents: Mice Identification Fecal droppings – Black and shiny when fresh – Brown and brittle when old – Size: 1/8 - 1/4”, rod shaped • Urine – Detected by long-wavelength UV light Gnaw marks – Rough-edged holes about 1.5” Rodents: Health Risks Plague ( Yersinia pestis ) Leptospirosis ( Leptospira icterhaemorrhagica ) Rickettsial pox ( Rickettsia prowazcki ) Salmonellosis ( Salmonella spp.) Trichinosis ( Trichinela spiralis ) Hemorrhagic fever (e.g. hantavirus) Rodents: Control Hard to control Sanitation: First line of defense – If there is no food they will move somewhere else – Eliminate garbage, debris, rubbish, spills Prevention of entry – Plant design: doors, walls, foundations – Vents, drains and windows covered with screen – Strip of gravel around building Rodents: Control Elimination of rodent shelters – Store garbage 0.5 m above ground – Food racks 15 cm above ground – Clean surrounding areas Rodents: Control • Eradication – Poisoning – Trapping – Ultrasonic devices – Gassing Rodents: Eradication Poisoning • Rodenticides – Anticoagulants (multi-dose poisons) Coumarin derivatives, bromodiolone, sodium fluourosilicate Rats can develop resistance – Red squill and Zn Phosphide (single-dose) Only effective against rats
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Rodents: Eradication Poisoning • Rodenticides – Application As baits in runaways and feeding sites Use of bait stations As tracking powder Rats are more wary than mice
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