Biotechnology A wild plant that has been accidentally pollinated by a genetically-modified plant and now contains that plant's abilities to resist herbicides and insects
Drug slang A regional term for high-quality marijuana
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.


a weed that has developed tolerance or resistance to a herbicide that once destroyed it.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
Third, there's the risk of ecological contamination, with the creation of super-weed species, or GM crops spreading their transgenes to neighboring farms, causing genetic pollution.
The RR plants have even invaded other crop species--becoming a "super-weed."
Instead they are creating super-pests and super-weeds, trapping farmers deeper in debt.
Surely scientists can tweak their formulae to stamp out super-weeds? Apparently it's not that simple.
Through rapid adaptation, super-weeds and super-bugs develop, requiring more and more potent poisons.
Some areas that the study will touch on will be claims that genetically modified organisms (GMOs) have deleterious effects on human and animal health; the creation of so-called "super-weeds;" the idea that the presence of GM crops reduces biodiversity; and others.
The chapter on the safety debate explores human and animal health concerns and the prospect of super-weeds, super-bugs, and loss of genetic diversity, with special focus on implications for developing countries.
The problem with this cozy arrangement, aside from the fact that Roundup-resistant "super-weeds" are emerging as a new biological catastrophe is that Glyphosate has now been demonstrated to be linked to birth defects as one of the most highly toxic substances in agriculture.
Such scenarios have the potential to produce "super-weeds." If you use the proper application rate in a decision-based management system, the chances of producing resistant species will be minimized.
To follow through on the previous crop seed example: If herbicide-resistant, genetically engineered crops were to breed with their wild cousins, it could lead to the creation of super-weeds undeterred by control efforts.
In reality, these super-weeds are resistant not to the glyphosate itself, but to the soilborne pathogens that normally do the killing in Roundup sprayed fields.
Limit weeding to battles with super-weeds such as bindweed or Canada thistle, which should be sliced off at ground level with a sharp knife.