What standard does aluminum phosphide fumigation of wheat worm food meet?

The height is 3 meters. According to the data of China Culture Network, the stored grain of wheat worms reaches the height of the grain pile of 3m, and aluminum phosphide fumigation requires that the central temperature in the smoke box or grain pile should be above 16 degrees, the fumigation concentration and time should be at 16-20 degrees Celsius, and the phosphine gas concentration should be kept at 300ppm for at least 6 days.