Small variations in the cost of manufacture 

 (including the cost of leaf), which do not ex- 

 ceed 10%, are usually borne by the manufac- 

 turer, and do not affect the price to the con- 

 sumer. But increase in taxation, either in- 

 ternal revenue or tariff, usually occasions a 

 diminution in consumption as it invariably in- 

 creases the cost. 



THE DISEASES OF TOBACCO DUE TO INSECT 

 PESTS, ETC. 



Tobacco, from the seed bed to the storage of 

 the manufactured products, is subject to at- 

 tack by insects, etc., and vigilance must at all 

 times be exercised to keep it free from such 

 harmful influences. 



Only a few of the principal agencies attack- 

 ing tobacco will be mentioned here as the sub- 

 ject is of more interest to the specialist than to 

 the smoker. The growing plant is particularly 

 subject to Cut-worm disease and Horn- worm 

 disease. Cut-worms are the larvae of several 

 species of moths. They injure the young, ten- 

 der plant and feed on the leaves. Horn-worms 

 are the larvae of the Sphinx Moth. 2 or 3 will 

 ruin a plant in one day. 



Stored tobacco is subject to many diseases. 

 Bud caperpillars, the leaf-miner or split-worm 



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