202 SOUTHERN FIELD CROPS 



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

 each pillar being topped with an inverted tin pan, having 

 no rim. An objection 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 be pro- 

 vided in a single crib of any of the ordinary kinds. 



Probably the need for an extreme amount of ventila- 

 tion has been overestimated. For many years the Ala- 

 bama Experiment Station has stored annually several 

 hundred bushels of unshucked corn in a tight crib made 

 of 12-inch boards, with as small cracks between them as 

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

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

 fide. In using such 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 very wet. 



It would probably also be advantageous, when practicable, to 

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

 following reasons : (1) The crib would hold about twice as many 

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

 be killed with a smaller amount 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 



