202 SOUrilEIiN FIELD CEOPS 



portion of each pillar being wrapped with new tin, or else 

 each pillar being topped with an inverted tin pan, having 

 no rim. An oljjection to this form of construction is the 

 greater height to which the corn must be thrown in un- 

 loading the wagons. 



187. Prevention of injury by weevils in cribs. — Weevils 

 cause a greater loss than do either defective ventilation 

 or rats and mice. The remedy for weevils is the vapor of 

 carbon [disulfide (Par. 194), which can only be applied 

 in a tight crib. Yet the double provision for ventilation 

 and for prevention of weevil injury cannot well he pro- 

 vided in a single crib of an}- of the ordinary kinds. 



Probablj' the need for an extreme amount of ventila- 

 tion has been overestimated. For many j-ears the Ala- 

 bama Experiment Station has stored annually several 

 hundred bushels of unshucked corn in a tight crili made 

 of 12-inch Ijoards, with as small cracks 1)etween them as 

 possible. In this crib it is practicalile to destroy most of 

 the weevil in unshucked corn by the use of carbon disul- 

 fide. In using sui'h a tight crib, it would be necessary 

 to store elsewhere, in some slatted crib, that part of the 

 crop that is not thoroughly mature, or that is put into 

 the crib when ver}^ wet. 



It would probably also )io advantageous, when practicable, to 

 shuck the corn before storing it in such a tight crib, for the 

 following reasons : (1) Tlie cril) would hold about twice as nmny 

 bushels of shucked as of unshucked corn ; (2) The weevils could 

 be killed with a smaller aiiiouni of carbon disulfide. 



In the case of a farmer putting part of his corn in a slatted crib 

 and part in a tight crib, that from the slatted crib should be used 

 first, since the corn in the tight crib could be kept sound through 

 the next summer by the occasional use of carbon disulfide, while 



