For what primary purpose is phosphine used in pest management?

Phosphine is primarily used as a fumigant, which is a form of pest management specifically designed to control pests in stored grains and other products. When phosphine is introduced into a sealed storage area, it generates gas that penetrates and kills insects and their eggs present in the materials. This is effective because it can reach pests that are hidden in areas where liquid insecticides might not be effective, ensuring a comprehensive approach to pest control.

The ability of phosphine to act as a gas allows for uniform distribution in the storage area, providing a more thorough eradication of pest populations. This makes it a valuable tool in the agriculture and food industry for maintaining the quality and safety of stored products.