A review on the application of pyridinecarboxylic acid herbicides
Pyridinecarboxylic acids are a group of synthetic auxin herbicides.To date,there are three effective ingredients,picloram,clopyralid,and aminopyralid were registered,and introduced to the market in 1963,1977,and 2005 respectively,mainly for the prevention and control of broadleaf weeds or shrubs.Among them aminopyralid also has soil sealing activity.The accurate action targets of pyridinecarboxylic acid herbicides are still unclear,although the auxin-binding protein family is a possible candidate.Seven weed species with eight biotypes were reported to hold resistance to pyridinecarboxylic acid herbicides all over the world.In China,there are 13 registered herbicide formulations containing picloram and clopyralid,and one formulation containing picloram,aminopyralid,and clopyralid.And pyridinecarboxylic acid herbicides are frequently mixed with other hormone herbicides,ALS(acetolactate synthase)inhibitors or ACCase(acetyl-CoA carboxylase)inhibitors in the herbicides registered abroad.Pyridinecarboxylic acid herbicides still have good market potential for weed management practice worldwide,but the sensitivities of common weeds populations to picloram,clopyralid,and aminopyralid should be systematically tested and resistance level of the main target weed species to these herbicides are also needs to be tested.
万方数据
维普
