A professional who tends machine and equipment that mix liquid and dry ingredients according to formula to produce insecticides, pesticides, and fungicides. Respnsibilities include:

• Weighs, measures, or turns valves to admit specified quantities and type of ingredients into mixer.
• Starts mixer to blend ingredients.
• Turns valve, pulls lever, or presses button to transfer mixture to storage tank or filling machine.
• Records quantity and type of ingredients mixed.
• May draw sample of product for laboratory testing.