Grain crops, such as cereals and produce seeds, nuts are a little element of water for about 10-20 percent solid tissue can maintain over 1 year, the loss is usually caused by insects and fungi only. Therefore, before to preserve the productivity of crops may be how to prevent pest and fungi by insecticide with the chemical protection or fungi or may use chemicals of crops to produce the insecticide contamination before storage. In a State that has better ventilation.