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Under greenhouse conditions the tomato is sub- 

 ject to a number of diseases, the most serious of 

 which fall under the head of soil diseases. Thorough 

 sterilization of the soil is necessary from year to 

 year. 



Pollination must usually be done by hand, 

 and large quantities of fertilizer and stable manure 

 judiciously used. Where proper conditions can be 

 given, the tomato proves a very profitable green- 

 house plant. It is usually grown as an early fall 

 and late spring crop, the intervening period being 

 devoted to lettuce. Plants for forcing purposes are 

 frequently grown from leaf and stem cuttings taken 

 in August from strong vigorous plants. 



Few insect enemies are found troublesome upon 

 the tomato. The tomato worm is the most serious 

 pest out of doors, but is easily held under control 

 by handpicking. It is more destructive in the South 

 than in the North. 



The white fly frequently becomes a serious pest in 

 the greenhouses. This insect is readily held in 

 check by fumigation with tobacco, as described 

 elsewhere. 



Mildew is a common disease often very destruc- 

 tive in the forcing house. Slight yellowish discol- 

 orations appear over the surface of the leaf, followed 

 by wrinkling and drying. The older leaves are 

 usually attacked first. The disease spreads quickly 

 from leaf to leaf until the plant is practically de- 

 stroyed. Infected plants should be removed at 

 once when discovered. Frequent spraying with 

 bordeaux mixture, or, if the fruit is maturing, cop- 

 per carbonate solution will prove effective in con- 

 trolling this trouble. The copper carbonate solution 

 is prepared by dissolving one ounce of copper car- 

 bonate crystals in three pints of ammonia. This stock 



