AGRICULTURAL TEXT-BOOK. 263 



Hoeing 4 times, - - 5.00 



Securing and killing worms, 



Topping and securing, 



Cutting and hanging to dry, 



Shipping and packing, 5.00 



Rent of drjf ing shed, 4 .00 



Freight, - 300 



$67.50 

 Produce 2000 Ibs. @ 8 cents, 160.00 



Net profit, $92.50 



580. The chief disease which affects the tobacco leaf is the 

 &quot; spot&quot; or &quot; firing,&quot; believed to be owing to rot. It appears when 

 there is too much rain ; and is more liable to occur on sandy 

 soils, than on those that are &quot; stiff, red and thirsty.&quot; We sus 

 pect that it is owing to too rapid an absorption of some material 

 from the soil, during wet weather; and that it resembles the 

 &quot; curl&quot; of the Peach-tree leaf under similar circumstances. The 

 practical cure is said to be deep plowing between the rows as 

 soon as it appears. A careful analysis of the leaf would proba 

 bly show a change in the proportion of some inorganic constitu 

 ents. 



581. The only insects usually liable to injure this plant, are a 

 Cut- worm, and the Tobacco- worm ; the latter follows this crop 

 wherever it is cultivated. Dr. Harris does appear to mention it. 

 The worms attack the plant twice in a season, first when the 

 latter are one third or one half grown, and again when the to 

 bacco is ready for cutting. The most effectual remedy is gath 

 ering them by hand and killing them ; but Turkeys are found 

 of givat assistance in destroying these insects : they eat, and kill 

 thousands which they do not eat. The first brood may be rea 

 dily destroyed by Turkeis, but when the second one appears 

 the tobacco is generally so large that Turkies do but little good. 

 (See Farmer s Library for 1848, for a full account of this 

 Insect.) 



582. To save the seed, allow a few of the strongest plants to 

 produce their flowers. Each plant will ripen, in September, as 



