Crop Ecologist Dr Richard Smith discusses farming systems
In this podcast, Jessica Strauss chats with Dr Richard Smith, who is an Associate Professor of Cropping Systems Ecology and Management at the University of New Hampshire and currently on sabbatical leave at AHRI.
Dr Smith’s research addresses the roles that ecologically-informed management and crop plant diversity play in promoting species interactions that benefit agriculture and weed management.
In addition to his research and teaching responsibilities, Dr Smith is also an Associate Editor for the journals Weed Research and Agroecology and Sustainable Food Systems.
Jessica talks to Richard about his work and also finds out about some of the core differences between farming in Australia and New Hampshire, where Richard is based.
Glyphosate resistance and plant fitness
Fri, 15 Dec 2017
Things that affect your fitness: Christmas – go on, have one more serving of trifle, it is only wafer thin! Television – for example, spending five full days watching the Boxing Day test match cricket. Each on their own are not too bad, but put them together and we have a problem. Things that affect plant fitness: The TIPS mutation that causes high-level glyphosate resistance. The TIPS mutation is a double mutation of the glyphosate target site, the 102 and the 106 mutation. The 106 mutation has been found in a number of species and has no fitness penalty associated…
Novel Tubulin Mutations Conferring Resistance to Dinitroaniline Herbicides in Lolium rigidum
Mon, 12 Feb 2018
This research documented target site resistance in a Lolium population resistant to trifluralin and other dinitroaniline herbicides. Target site resistance in this particular population is endowed by changes at Arginine 243 of the alpha tubulin gene. PCR work established that amino acid substitution of Arg 243 with either Met or Lys endows 4-8 fold trifluralin resistance.