CORN PESTS AND DISEASES 275 



There is but one standard remedy for all stored 

 grain insect pests, and that is scrupulous cleanliness 

 supplemented by the free use of bisulphid of carbon. 

 The bisulphid is usually evaporated in vessels con- 

 taining one-fourth or one-half a pound each, and 

 is applied in tight bins- at the rate of a pound 

 to a pound and a half to the ton of grain, and \ 

 in more open bins a larger quantity is used. For 

 smaller masses of grain or other material an ounce 

 is evaporated to every one hundred pounds of the in- 

 fested matter. Bins may be rendered nearly air-tight 

 by covering with cloth, blankets or canvas. Infested 

 grain is generally subjected to the bisulphid treatment 

 for twenty-four hours, but may be exposed much 

 longer without harming it for milling purposes. If 

 not exposed for more than thirty-six hours its ger- 

 minating power will not be impaired. In open cribs 

 and badly infested buildings it may sometimes b_- 

 necessary to use a double quantity and repeat treatment 

 at intervals of about six weeks during the warmest 

 weather. 



For a complete and detailed account of this sub- 

 stance, together with directions for its application in' 

 stored corn, the reader is referred to the book "Fumi- 

 gation Methods," published by Orange Judd Company, 

 New York. 



MANUFACTURED PRODUCTS 



The Indian meal moth has a wide distribution and 

 does not confine its attacks to grains and farinaceous 

 products, but feeds on seeds and various kinds of nuts, 

 dried fruits, roots and herbs. It is an all-round nui- 

 sance in granaries, stores, and in houses. The moths 

 are quite active and are easily disturbed. They may 

 be seen flying about a granary, warehouse or pantry 

 in the daytime, but they are usually more active at 



