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Post by High Sierra Fan on Aug 11, 2020 11:35:49 GMT -8
“ A new type of insect repellent will be making its way to drugstore shelves — and it smells like grapefruit. Monday, the Environmental Protection Agency announced that it had approved a new ingredient, called nootkatone, that repels and kills mosquitoes and ticks. The naturally occurring ingredient — which is responsible for the characteristic scent of grapefruit — was discovered by the Centers for Disease Control and Prevention and developed into an insecticide. It’s also found in Alaska yellow cedar trees and is widely used in the cosmetic industry to make perfumes and colognes. www.nbcnews.com/health/health-news/first-new-insect-repellent-approved-11-years-smells-grapefruit-n1236434 Nootkatone Now Registered by EPA
For Release: August 10, 2020www.epa.gov/pesticides/nootkatone-now-registered-epa |
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rebeccad
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Writing like a maniac
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Post by rebeccad on Aug 11, 2020 12:01:25 GMT -8
I would really not mind an alternative to DEET, especially one that doesn’t melt plastic.
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texasbb
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Hates chicken
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Post by texasbb on Aug 11, 2020 12:07:01 GMT -8
Sounds like good bear bait!
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texasbb
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Posts: 1,223
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Post by texasbb on Aug 11, 2020 12:10:47 GMT -8
The introduction of a new chemical — the first since 2009 — can also help fight resistance to many common insect repellents seen by insects today. (When insects develop resistance to an ingredient, the product is less effective.) How would insects develop resistance to a repellent (as opposed to a pesticide)? |
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Post by High Sierra Fan on Aug 11, 2020 13:38:11 GMT -8
The introduction of a new chemical — the first since 2009 — can also help fight resistance to many common insect repellents seen by insects today. (When insects develop resistance to an ingredient, the product is less effective.) How would insects develop resistance to a repellent (as opposed to a pesticide)? Female mosquitos who were less susceptible to the chemical “jamming” their sensors would be more successful in getting the blood meal to fuel their egg laying. More successful egg laying would add more of the less susceptible mosquitos to the population. Repellants tend to work by binding to the chemo-receptors the insects use to home in on their meal. It’s why not much in that realm is effective against biting flies ; they seek food with those big eyes. |
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texasbb
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Post by texasbb on Aug 11, 2020 16:51:07 GMT -8
How would insects develop resistance to a repellent (as opposed to a pesticide)? Female mosquitos who were less susceptible to the chemical “jamming” their sensors would be more successful in getting the blood meal to fuel their egg laying. More successful egg laying would add more of the less susceptible mosquitos to the population. Repellants tend to work by binding to the chemo-receptors the insects use to home in on their meal. It’s why not much in that realm is effective against biting flies ; they seek food with those big eyes. Are humans that big a component of the mosquito population's diet? |
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Post by High Sierra Fan on Aug 11, 2020 17:08:15 GMT -8
That’s the mechanism that natural selection would take to yield repellent resistant (more accurately Repellent ignoring) mosquitos.
. Whether that alluded to phenomena occurs? Shrug. But that’s the “how”.
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ErnieW
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Post by ErnieW on Aug 15, 2020 20:12:15 GMT -8
Are humans that big a component of the mosquito population's diet? Mosquitoes that breed in stagnant water in urban and dense suburban setting may have little other choice. |
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