Weed species evolving herbicide resistance - looking for articles

[spahus]

Hi everyone,

 

I've been looking for articles and publications of the traits, that can cause a certain weed species (on crops) to evolve herbicide resistance much more likely and faster than other species, e.g dormancy, outcrossing, fecundity, mortality, competition etc.

 

I haven't found that many articles yet, and perhaps there aren't that many to be found. There are many articles telling how different herbicide levels and treatments can affect evolution of resistance, but my focus is on weed ecology. If someone has any ideas, I would be most happy to hear from you!

 

You can e-mail me the citation blackunicorn.jp@gmail.com

 

Thankyou!

Edited August 31, 2011 by spahus

[jeskill]

From Wikipedia:

(Yes, it's gauche to quote wikipedia, but it's a good starting point, no? )

Propensity of pest populations to develop resistance is probably caused by a number of factors. First, pest species are usually capable of producing large number of offspring. This increases the probability of random mutations and ensures the rapid build-up in numbers of resistant mutants once such mutations have occurred. Secondly, pest species have been exposed to natural toxins for a long time before the onset of human civilization. For example, many plants produce phytotoxins to protect them from herbivores. As a result, coevolution of herbivores and their host plants required development of the physiological capability to detoxify or tolerate poisons.[5][6] Thirdly, humans often rely almost exclusively on insecticides for pest control. This increases selection pressure towards resistance. Pesticides that fail to break down quickly and remain in the area contribute to selection for resistant organisms even after they are no longer being applied.[7]

 

In response to pesticide resistance, pest managers may resort to increased use of pesticides, exacerbating the problem.[8] In addition, when pesticides are toxic toward species that feed on or compete with pests, the pest population will likely expand further, requiring more pesticides.[8] This is sometimes referred to as pesticide trap,[8] or a pesticide treadmill, since farmers are continually paying more for less benefit.[4]

 

Insect predators and parasites which live on other insects generally have smaller populations and are therefore much less likely to develop resistance than are the primary targets of the pesticides, such as mosquitoes and those that feed on plants. This can compound the pest problem because these species normally keep pest populations in check.[7] But resistant predators of pest species can be bred in laboratories, which can help keep pest populations down.[7]

 

The fewer sources of food a pest has the more likely it is to develop resistance, because it is exposed to higher concentrations of pesticides and has less opportunity to breed with populations that have not been exposed.[7] Other factors in the speed with which a species develops resistance are generation time and fecundity (shorter generations and more offspring lead to resistance more quickly).[7]

[spahus]

Yeah, thanks for that. I will check the citations there.

[JorgeLobo]

Dispute that Wikipedia is a good starting point for anything but a high school report. Pubmed and Google scholar as well as focused searches in specific journals offer the best source of data-based info vs. the dumbed-down, unrefereed Wikipedia summaries.

 

 

Google scholar reports a number of such articles, following is one. Also suggest you search the Weed Science journal at: http://www.wssa.net/WSSA/Pubs/IPSM.htm

 

 

“Transgenic treadmill”: Responses to the emergence and spread of glyphosate-resistant johnsongrass in Argentina

[PDF] from uab.esR Binimelis, W Pengue… - Geoforum, 2009 - Elsevier

The broad-spectrum herbicide glyphosate has become the largest-selling crop-protection product

worldwide. The increased use of glyphosate is associated with the appearance of a growing

number of tolerant or resistant weeds, with socio-environmental consequences apart from ...

 

 

 

 

[spahus]

Yes, I have been using ISI Web of Science and Google Scholar a lot. I have been actually doing searches for a 4 months now. I was just curious if someone has actually some articles and would be willing to tell about them.

 

But thanks anyway

[jeskill]

Dispute that Wikipedia is a good starting point for anything but a high school report. Pubmed and Google scholar as well as focused searches in specific journals offer the best source of data-based info vs. the dumbed-down, unrefereed Wikipedia summaries.

 

 

It depends on how you use wikipedia. Sometimes I have trouble finding the right search terms to get the papers I'm looking for on WOS or google scholar. A wikipedia article (or a random article on the web) can give an overview with potentially good search terms, and can help by giving some starting citations with which I would then use to find other papers (using "Times Cited" or otherwise).

 

For example, I was looking up "intraspecific diversity" and corn last week, and getting very few hits. A random web page made me realize that the term I was searching for was "cultivar mixture". I wouldn't have gotten that from searching google scholar or WOS.

[JorgeLobo]

I'm happy it works for you - doubt if any scientist would start there.

 

The inquiry was for scientiifc articles not a casual overview. Citations are much more accurately and simply obtained at pubmed and google shcolar.

 

 

[spahus]

It depends on how you use wikipedia. Sometimes I have trouble finding the right search terms to get the papers I'm looking for on WOS or google scholar. A wikipedia article (or a random article on the web) can give an overview with potentially good search terms, and can help by giving some starting citations with which I would then use to find other papers (using "Times Cited" or otherwise).

 

For example, I was looking up "intraspecific diversity" and corn last week, and getting very few hits. A random web page made me realize that the term I was searching for was "cultivar mixture". I wouldn't have gotten that from searching google scholar or WOS.

 

I would prefer searching some good reviews using e.g Scholar and take citations there