夏天到了，可以计划到远处旅游了...
- 主题发起人 Aurora Borealis
- 开始时间
oread
新手上路
- 注册
- 2002-01-24
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小做了一下调查, 这个东东好像不太管用啊.
Reducing Local Mosquito Populations
Consumers may still find advertisements for small ultrasonic electronic devices that are meant to be carried on the body and purportedly emit sounds that repel mosquitoes. Many studies conducted in the field and laboratory show that these devices do not work against mosquitoes (109-111). Encouraging natural predation of insects by setting up bird or bat houses in the backyard has also been unsuccessful in reducing local mosquito populations (112). Likewise, backyard bug "zappers," which lure and electrocute insects, are ineffective (113). Mosquitoes continue to be more attracted to humans than to the devices. One study conducted in homeowners' backyards showed that of the insects killed by these devices, only 0.13% were female mosquitoes (114). An estimated 71 billion to 350 billion beneficial insects may be killed annually in the United States by these electrocuting devices (114). The most effective way to reduce a local population of mosquitoes is to eliminate sources of standing water, such as old discarded tires, clogged gutters, planters, bird baths, or tree stump holes.
Excerpt from
http://www.acponline.org/journals/annals/01jun98/mosquito.htm
Annals of Internal Medicine
REVIEWS
Mosquitoes and Mosquito Repellents: A Clinician's Guide
Annals of Internal Medicine, 1 June 1998. 128:931-940.
Mark S. Fradin, MD
Reducing Local Mosquito Populations
Consumers may still find advertisements for small ultrasonic electronic devices that are meant to be carried on the body and purportedly emit sounds that repel mosquitoes. Many studies conducted in the field and laboratory show that these devices do not work against mosquitoes (109-111). Encouraging natural predation of insects by setting up bird or bat houses in the backyard has also been unsuccessful in reducing local mosquito populations (112). Likewise, backyard bug "zappers," which lure and electrocute insects, are ineffective (113). Mosquitoes continue to be more attracted to humans than to the devices. One study conducted in homeowners' backyards showed that of the insects killed by these devices, only 0.13% were female mosquitoes (114). An estimated 71 billion to 350 billion beneficial insects may be killed annually in the United States by these electrocuting devices (114). The most effective way to reduce a local population of mosquitoes is to eliminate sources of standing water, such as old discarded tires, clogged gutters, planters, bird baths, or tree stump holes.
Excerpt from
http://www.acponline.org/journals/annals/01jun98/mosquito.htm
Annals of Internal Medicine
REVIEWS
Mosquitoes and Mosquito Repellents: A Clinician's Guide
Annals of Internal Medicine, 1 June 1998. 128:931-940.
Mark S. Fradin, MD
花心客
我本无心，逍遥红
- 注册
- 2002-01-27
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- 1,707
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有朋友正在组织去玩儿漂流，时间地点都还没定，或许大家可以凑在一起。
www.newworld.ca
www.owl-mkc.ca
www.wildernesstours.com
www.riverrunners.com/
www.espritrafting.com/rafting/ottawa.html
here is more info about newworld:
Okay for those of you who would like to raft for 1 day stay two night.
........
Raft & Leisure - Two days $119.00 (+tax)
Take the Classic Rouge Rafting trip, add 2
nights camping, 2
healthy breakfast and a poolside lunch and you
have our popular
Raft & Leisure trip. With plenty of time for
soaking up the sun or
just soaking in the hot tubs, the rafting trip
becomes a
memorable occasion. Enjoy the volleyball court,
500 metre
rollerblade fastrack, horseshoe pits or take a
plunge in the heated
pool. Just bring your camping gear and a desire
for fun and let
New World do the rest !
for those of you who would like to raft for 2 day stay two nights..........
ADVENTURE CLUB - two days $179.00 (+tax)
If your idea of adventure means sleeping out in
a forest, Rafting,
Kayaking, Sportyaking or biking on mountain
trails then the New
World Adventure Club is for you. Two full days
of excitement,
hearty meals, poolside bar-terrace and campfire
parties all come
together to make the Adventure Club a memorable
weekend
event. Included are all activities as booked
(Rafting, Sportyak,
Horseback riding, Mountain bike, Kayak
initiation or Paintball), 6
meals, 2 nights of camping, access to all the
facilities at the New
World Centre. River activities include all
necessary river
equipment (wetsuit available at extra charge).
Paintball includes
Hail Mission. Camping includes site and
firewood pits only. Bring
your own camping equipment. Shanties or teepees
available for
rent.
The place is approximately an hour away in Quebec and if you wanted look up
more info you can take a look at www.newworld.ca
