Archive for October, 2012

More California Rodents Test Positive for Plague – PCT Magazine

More California Rodents Test Positive for Plague
PCT Magazine
To report a sick or dead rodent, contact El Dorado County Vector Control at (530) 573-3197. For more information on plague in California, visit the following website: http://www.cdph.ca.gov/healthinfo/discond/Pages/Plague.aspx. Register or Log In

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Kudzu bugs move in – Aiken Standard

Kudzu bugs move in
Aiken Standard
A new pest has made its way into Aiken County, and it could be looking to move in to your home for the winter. Kudzu bugs ? Megacopta cribraria ? are native to Asia but were first detected in the United States around 2009, when they appeared in central

and more »

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Passengers panic as pests overrun dirty train bogies – Times of India

Passengers panic as pests overrun dirty train bogies
Times of India
CHENNAI: Southern Railway has clearly had little success in its attempts to eliminate pests on trains. Cockroaches and other insects swarmed into an AC III tier coach in Pandian Express on Thursday night, leaving passengers travelling from Madurai to

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Invasive pest threatens blueberries – South Bend Tribune

Invasive pest threatens blueberries
South Bend Tribune
"We hope to find a possibility of a predator that will eat these insects or a possible trap, but we are still researching and figuring out what we can do," he said. "Another idea that we have thought of is putting nets over the berry bushes so that the

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Waiheke Island on alert for invasive pest plant

The call is out to Waiheke Island residents to report sightings of a rare and potentially invasive pest plant. Seedling and adult scrambling lily plants (Geitonomplesium cymosum) were located in Rocky Bay in August. Auckland Council?s biosecurity team is treating the control of this pest plant as a high priority, and they are calling on the public to help. The plant is a vigorous climber that …

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Oct 29, 2012 – Irresistible Odors

QUESTION:

In mouse exclusion, my understanding is that when blocking the entrance/exit hole the most important objective is to stop all air drafts. With no air drafts the rodent doesn’t realize that a hole exists. If this is correct, what about pheromones? Don’t pheromones attract the rodents as well? I use foam to do exclusions and sometimes the rodents chew through, but most of the time they do not.

ANSWER:

I think that foam is a good immediate way to close off entry points or to fill large holes, but once it dries rats and mice will easily gnaw through it again. Better would be to permanently close that opening as soon as possible with some more impermeable material like metal flashing or caulking or concrete, depending on where the hole is. You might even shove a wad of copper or stainless steel mesh (Univar sells both) into the hole before then filling it with the expanding foam, as mice and rats appear to be deterred from gnawing by the wire materials. 

Odors definitely are an attraction to rodents, including even the odors of foods that may seep through gaps or holes from the interior of a home or other structure. Even warm air flowing out a gap could be an attraction to the rodent looking for a warmer, cozier place to be, and if the gap is wide enough the rat or mouse easily will move through to investigate. In his excellent book on Rodent Control Dr. Robert Corrigan stresses once more that the House Mouse can move through any gap 1/4 inch high and 3/8 inch wide (about the width of a wood pencil or diameter of a dime) and a rat can squeeze through a gap 1/2 inch high or 3/4 inch wide (about the diameter of a quarter). Of course, these kinds of gaps also could admit many other unwanted critters, such as most bugs, snakes, or bats if those gaps are higher up on the building. 
I don’t know if a rat or mouse would necessarily completely miss a hole or gap if no odors or other air currents were coming out of it. They don’t have great eyesight, but they still can see and they have whiskers (vibrissae) that are very sensitive that might detect that hole as they pass by. Since house mice in particular are very curious and always looking for places to explore, the discovery of a hole or gap could lead them to move through just to see what’s on the other side. Heck, there could be food or just a nice place to hang out, so checking out openings is normal for them. It is suggested that this is one reason they enter bait stations, to see what may be inside. The hole also could represent an opening leading to a secure cavity that hides them from the dangers they face from predators when they are exposed and moving about in the open. 
Pheromones are not restricted to insects, and mice and rats use them effectively too as chemical messages. Mice are well known for urinating all over the place, leaving behind pheromones that communicate to other mice that this one has been there. Mice may leave more than 3,000 “micro” droplets each day in their territory, and this is not just due to poor bladder control. They leave all these droplets as messages and as signals for them to use as they move around. As Dr. Corrigan stated it, mouse urine is their main source of social odors. It may enhance recognition of new objects or of hazards and it provides social orientation, determining dominance by some mice. These urine and fecal paths are vital for the PMP to locate in mouse management. 
Now, whether or not you can successfully eliminate ALL odors from moving past a point is debatable, but by closing off gaps completely you probably do a pretty good job of reducing the air flow and associated odors to a point that at least reduces a rodents interest in a former opening. 

View past Ask Mr. Pest Control questions.

Honey-bees found to have bite that stuns

Honey-bees are known for their sting, but scientists have now discovered they can also bite. Bees resort to biting when faced with pests, such as parasitic mites, that are too small to sting. Close study of the biting behaviour has revealed that …

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Congress to carry out pest control across city wards – Times of India

Congress to carry out pest control across city wards
Times of India
Without relying on the administration to act upon these requests, the Congress has decided to hire services of private pest control organizations to spray in areasa to ensure that mosquitoes cannot breed in large numbers," Chhajed said. While there

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Threatening pest – Fiji Times


Sky News Australia

Threatening pest
Fiji Times
THE issue surrounding the danger of exotic pests and diseases being introduced to Australia through ginger imports from Fiji had been addressed with the Australian Department of Agriculture, Fisheries and Forestry (DAFF) who granted Fiji approval to
Fiji ginger, Malaysia pineapple imports under Australian scrutinyRadio Australia

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People warned to protect homes from pests during storm & clean-up – WPRO


WPRO

People warned to protect homes from pests during storm & clean-up
WPRO
As Rhode Islanders gear up for what is expected to be a monster of a storm next week there is one threat that many people may have forgotten about; pests. With a potentially destructive storm that may knock down tree limbs and destroy the homes of

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