Organophosphate (OPs) insecticides are widely used on a large variety of crops. Examples of work activities involving OPs include: 

• pest control operators who use OPs in their work 
• manufacture, formulation and packaging 
• transport, storage and distribution 
• handling used containers, for example in scrap recovery 
• agricultural and horticultural activities like mixing, loading and applications where direct handling of the chemical occurs 
• animal health treatments like cattle and sheep dipping 
• seasonal field workers exposed to pesticide residues 
• laboratory workers undertaking research on OPs