. Biology of the tobacco moth and its control in closed storage. Tobacco moth; Tobacco moth Control; Tobacco Storage Diseases and injuries. 24 CIRCULAR 4 2 2, U. S. DEPARTMENT OF AGRICULTURE The eaves of the warehouses, wherever possible, were sealed from the inside with elastic roofing cement (fig. 16). This material was inexpensive, durable, and not difficult to apply. In some instances it was found necessary to seal the flashing around the eaves and the skylights from the roof. This sealing was satisfactorily done by pasting strips of a tough paper over the metal flashing where it joined th
. Biology of the tobacco moth and its control in closed storage. Tobacco moth; Tobacco moth Control; Tobacco Storage Diseases and injuries. 24 CIRCULAR 4 2 2, U. S. DEPARTMENT OF AGRICULTURE The eaves of the warehouses, wherever possible, were sealed from the inside with elastic roofing cement (fig. 16). This material was inexpensive, durable, and not difficult to apply. In some instances it was found necessary to seal the flashing around the eaves and the skylights from the roof. This sealing was satisfactorily done by pasting strips of a tough paper over the metal flashing where it joined the brick wall, by using a paperhangers* paste. This method of sealing from the roof is shown in detail in figure 17. It should be empha- sized, however, that ordi- narily a most effective seal was obtained from the inside, using the elas- tic cement, and it is rec- ommended that, when- ever possible, the eaves of tobacco warehouses be sealed from the inside. Many of the windows in the warehouse shown in figure 12 had loose frames and were in poor condition, generally, and it was found advisable to seal the entire window space with a gasproof tar paper. The paper was cut to fit and tacked to the sills and facing. A wooden strip was then tacked over the paper along the window frames and elastic roofing cement used for sealing along the edges. This method of sealing windows is shown in figure 18. The sliding doors of the warehouses presented a difficult problem in sealing. A sealing mixture was developed, consisting of 4 parts of asbestos to 1 part of calcium chloride and sufficient water to make a stiff dough. This mixture was prepared in a large shallow box mounted on a small truck and was plastered around all edges of the doors, effecting a complete seal. The calcium chloride preserved the moisture in the asbestos and prevented cracking before the end of the experiment. This mixture had the advantage of cheapness and ease of application, and was easily removed from the doors at
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