How to Fumigate Rice

The United States Grain Standards Act provides regulations surrounding when and how rice should be fumigated to kill live insects found in the rice. These regulations govern rice that is both stationary and in transit, what chemicals can be used in each case and the methods that can be used for fumigation purposes, as well as how long the rice must remain sealed and stationary after the fumigation process is completed.

Instructions

• 1

  Inspect the rice for insect infestation. The quantity necessary to prompt fumigation varies based on the type of rice and the carrier being used to transport it. For example, any live insects in milled rice will require fumigation. If the inspection reveals insects, then an "Infested" designation will be applied to the load.

• 2

  Determine the correct fumigant to use for your situation. As of 2011, methyl bromide, metal phosphide or carbon dioxide are acceptable for a stationary load of rice. Only metal phosphide and carbon dioxide are acceptable if the load is in transit.

• 3

  Use proper procedures for the type of rice being fumigated. For example, a dust retention device must be used if the load contains milled or brown rice.

• 4

  Leave the load where it is for up to 96 hours after treatment. The exact amount of time depends on the type of fumigant used. As of 2011, methyl bromide must sit 24 hours, while metal phosphide needs 72 hours and carbon dioxide requires 96 hours.