Preliminary study on special fumigation methods

A good fumigation result has been achieved by extensive applying phosphine circulation fumigation technologies to grain storage , but it has been very expensive to fumigate the whole depot in some special storage conditions. There, it is requisite to discuss a few special methods of fumigation and stored grain insect controlling in such particular storage conditions as partially infested grain in bulk , surface treatment of grain in bulk,fumigation of cereal on the corner where a fumigant can not penetrate into,and fumigation of a large grain store-house,which has an evident cold core in the grain bulk.