Ammonium 2,2'-thiodiacetates - Selective and environmentally safe herbicides

Area of Science:

• Coordination Chemistry
• Agrochemical Research
• Plant Science

Background:

• 2,2'-Thiodiacetic acid derivatives are primarily used in coordination chemistry.
• Quaternary ammonium salts (QASs) are being explored for novel applications beyond their traditional uses.
• The phytotoxicity and herbicidal potential of QASs, specifically thiodiacetate derivatives, require investigation.

Purpose of the Study:

• To investigate the phytotoxicity of alkyl and aryl quaternary ammonium salts (QASs) on plant growth.
• To evaluate the herbicidal activity of these QASs against common weed species.
• To determine the potential of quaternary ammonium 2,2'-thiodiacetate salts as agricultural herbicides.

Main Methods:

• Testing the phytotoxicity of various QASs on monocotyledonous (spring barley) and dicotyledonous (common radish) food crops.
• Assessing the herbicidal efficacy of QASs against weed species including white goosefoot, sorrel, and gallant-soldier.
• Analyzing the selective toxicity of aliphatic QASs towards weeds versus crops.

Main Results:

• Aliphatic QASs demonstrated low phytotoxicity towards cultivated food crops.
• Triethylammonium salt exhibited potent and selective herbicidal properties against sorrel and gallant-soldier.
• The tested QASs were ineffective as herbicides against white goosefoot.

Conclusions:

• Quaternary ammonium 2,2'-thiodiacetate salts, particularly certain aliphatic derivatives, show promise as selective herbicides in agriculture.
• Triethylammonium salt is a potential candidate for weed management, targeting specific species like sorrel and gallant-soldier.
• Further research is warranted to explore the full potential and limitations of these compounds in agricultural weed control.