1. Plural of diazinon; a widely used organophosphate insecticide formerly applied to crops, lawns, and pets to control insects.
Usage: chemistry/agriculture; largely phased out in many countries due to environmental and health concerns

Examples

• Diazinons were commonly used on fruit trees to eliminate aphids and other pests.
• The EPA restricted the use of diazinons on residential lawns in the early 2000s.
• Farmers applied diazinons to protect their crops from destructive insects.
• Many pet flea treatments once contained diazinons as an active ingredient.
• Environmental studies documented the presence of diazinons in groundwater near agricultural areas.