Pest detection and monitoring probe in a grain storage bin

A method of exterminating pests in a grain storage bin, the method comprising:

• detecting presence of the pests in a grain bed of the storage bin using a video camera;
• fumigating the grain bed with a fumigant gas;
• measuring a first concentration of the fumigant gas and a temperature in the grain bed during the fumigating;
• monitoring the pests with the video camera during the fumigating to determine whether the pests continue to move during the fumigating thereby determining that the concentration of the fumigant gas in the grain bed was insufficient to exterminate the pests;
• monitoring the pests with the video camera after the fumigating to determine whether the pests begin to move again thereby determining that the concentration of the fumigant gas in the grain bed was too high to exterminate the pests;
• and,
• if the pests continue to move during the fumigating or begin to move again after the fumigating, using the first concentration of the fumigant gas and the temperature in the grain bed to determine a second concentration of the fumigant gas to be applied to the grain bed to exterminate the pests.