ISU’s Weekly Update
March 15, 2010
New articles in the ICM Newsletter for the week of 3/8/2010 – 3/14/2010.
March 28, 2007 Agronomy
ISU: New wrinkle on glyphosate resistant Conyza: interspecific hybridization
The ability of weeds to evolve resistance to glyphosate has been well-documented.
Furthermore, the introgression of herbicide resistance between crops and weeds has been widely characterized. However, the transfer of herbicide resistance between different weed species is less well described in the scientific literature.
A recent publication in the American Journal of Botany [94 (4):660-673] “Transfer of glyphosate resistance: evidence of hybridization in Conyza (Asteraceae)” by Zelaya, Owen and VanGessel describes the introgression of a glyphosate resistance gene between Conyza canadensis (horseweed) and C. ramosissima (dwarf horseweed).
While the immediate implications on agriculture are not likely significant, the ability for herbicide resistance to move via pollen between weed species is indicative of the complexity of weed management in crops.
Prepared by Micheal D. K. Owen, extension weed management specialist, Department of Agronomy, Iowa State University
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Recent NewsNews Archives
Purdue: Pest&Crop Newsletter
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Welcome to a new year of the Pest&Crop Newsletter! Here is the link Issue 1.
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ANAHIEM, Calif. (DTN) — While a few companies will shoulder the brunt of criticism in upcoming discussions on the competitive climate — or lack of one — in agriculture, the reputation for all of agriculture may be at stake.
Tips for Handling a Wet Spring
March 11, 2010
Editor’s Note: Dan Davidson provides insight into what farmers might do this spring to deal with wet soil conditions. The information was provided specifically to AgProfessional so that readers can talk with customers about alternative field work that might be necessary this spring and to allow consultants and ag retailers to determine recommendations for fertilizer programs fitting into a farmer’s unusual spring workload.
Planting date recommendations for Iowa
March 11, 2010
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