EXPERIMENT STATION BULLETINS. 377 



up). The liiglier the pressure llie finer is the mist produced, and the bet- 

 ter the protection. A small sprayer is hettcr than none. 



The College experiments of last summer at Muskegon demonstrate the 

 value of spraying. The crop of celery harvested from the experimental 

 field uxis the only celery of good quality harvested (iho<ut Muskegon last 

 fall. (Fig. 8). The following is the report of Mr. Joldersma, on whose 

 farm the spraying was done: 



One-sixth acre (from which accurate returns Avere 

 kept) sprayed with a knapsack sprayer at a 

 total expense of |2.00 for labor and material 

 gave 125 crates (10x10) fine quality at |1.00 

 value |125 00 



A similar unspraved area gave 18 crates poor qual- 

 ity at 50c ' 9 00 



Excess return of sprayed plot |11G 00 



Cost of spraying 2 00 



Net gain fill 00 



On the rest of the acreage, at an expense of not more than |12.00, Mr. 

 Joldersma saved a crop valued at about flSOO.OO. 

 Mr. T. F. Spellman, Decatur, Mich., reports 



Sprayed six acres with a horse-drawn traction 

 sprayer, using 40 pounds Blue Vitriol and 40 

 pounds lime. Labor account was not kept, but 

 was probably not more than |25. 11 cars (about 

 2000 crates) , celery receipts |2195 55 



Total expense — seed, fertilizer, spraving, total 



labor F. O. B. cars 440 98 



Net value of crop |1754 57 



No check was run on this test, but from the fact that the crop about 

 Muskegon, Kalamazoo and Decatur was almost a total loss, and from 

 the appearance of the fields nearby, it seems safe to attribute the excel- 

 lence of this crop to the spraying. 



Spraying and other practices outlined in this bulletin, in spite of cost, 

 must be made a part of good celery growing. 



Bluestone is high priced this year and hard to obtain at any price. 

 Nevertheless, celery diseases must be fought if the grower is to be sure 

 of a crop each year. Blight does not come every year but no one knows 

 when the next outbreak will come. As a matter of safety the grower 

 should follow the instructions given to insure a crop in spite of bad 

 weather. The saving of one crop will pay for 20 years spraying. The 

 Michigan Agricultural College will answer questions on celery diseases 

 and will diagnose specimens free of charge. We invite correspondence on 

 celery disease problems. Address Department of Botany, Experiment 

 Station, East Lansing, Mich. 



