Method of cleaning residual pesticide from an agricultural vessel

A method of preparing a tank for use in connection with a second pesticide following use of the tank in connection with a first pesticide, the method comprising:

• introducing a cleaning mixture into a tank containing a residual amount of the first pesticide, wherein the cleaning mixture comprises
• (a) a source of transition metal ions, and
• (b) a source of hydrogen peroxide;
• allowing the cleaning mixture to remain in the tank for a time sufficient to degrade at least a portion of the residual amount of the first pesticide, thereby forming a waste mixture comprising degradation products of the first pesticide;
• and
• removing the waste mixture from the tank, wherein:
• the duration between introduction of the cleaning mixture into the tank and removal of the waste mixture from the tank is less than about 30 minutes;
• and
• at least about 90% by weight of the residual amount of the first pesticide has been degraded when the waste mixture is removed from the tank.