Further Thoughts: Bt cotton and the evolution of resistance

| 8 Comments

In a very interesting post, Ian Ramjohn covers some interesting research about the evolution of Bt resistance in cotton pests.

In an article published in Nature Biotechnology, Bruce Tabashnik and colleagues looked at the actual pattern of evolution of resistance to Bt toxin Cry1Ac in cotton over a 10-year period. They used studies conducted in Australia, China, Spain and the United States focusing on six pest species: Helicoverpa armigera, H. zea, Heliothis virescens, Ostrinia nubilalis, Pectinophora gossypiella and Sesamia nonagrioides. They found that in only one of these species - H. zea - had the frequency of resistance genes increased substantially.

Go read the rest at Further Thoughts.

HT: ResearchBlogging.org’s feed, which is becoming an excellent resource.

8 Comments

I used to teach a lab exercise on Koch’s Postulates (which is the series of steps linking a pathogen to a disease) using tobacco hornworms and DiPel dust (Bt). We exposed the larva to Bt, dissected them and cultured the bacillus and then reinfected healthy hornworms. When I first started doing the lab many years ago, the hornworms (which were supplied by a company in North Carolina) died quite quickly from Bt infection and the lab was an excellent one. I stopped using hornworms about 3 years ago when I could no longer get them to die from exposure to Bt.

But will the evolution deniers cotton to this new research? :p

Henry J:

But will the evolution deniers cotton to this new research? :p

Nope - but that’s because the Disco Institute has pulled the wool over their eyes…

Well that was sheepish of them.

Why can’t we just make sheep through mutations in cotton. If evolutionism was true, this should not be a problem since both wool and cotton are fabrics. This really shouldn’t that many random mutations, should it?

Are you trying to make cotton, sheep, or wool? In your haste to be snarky you seemed to have confused which one was made up of protein and which ones were made up of cells capable of actually evolution.

JGB — The consensus is that poster Pole Greaser is a trouble-making troll posing as a creationist troll.

Best to ignore him.

Pole Greaser:

Why can’t we just make sheep through mutations in cotton. If evolutionism was true, this should not be a problem since both wool and cotton are fabrics. This really shouldn’t that many random mutations, should it?

Fabrics are human inventions. Wool and cotton are otherwise not closely related. BTW, you never acknowledged your fusion goof, troll.

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This page contains a single entry by Reed A. Cartwright published on February 23, 2008 11:29 PM.

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