Wiyiter Meeting. 235 



REPORT OF SPRAYING OPERATIONS AT THE DARBY 

 FRUIT FARM, AMORET, BATES COUNTY, MISSOURI, 



FOR SEASON 1906. 



Total area sprayed, 400 acres of apple orchard; trees, 11 years 

 old; 350 acres treated with liquid spray, and applied with two 

 Wallace Power Sprayers; 50 acres treated with dust spray, and 

 applied with Dust Sprayer Mfg. Co., Ideal Dust Sprayer. 



LIQUID SPRAY. 



We made the first spraying just as the buds commenced to 

 develop; second spraying, just as the bloom began to drop. Then 

 continued spraying as rapidly as we could get over the 350 acres 

 with the two liquid sprayers, up to the 15th of August, making six 

 spraying in all. 



We used the Bordeaux mixture at 4-6-50 strength for fungus. 

 As an insecticide, when using arsenate of lead, we used 10 pounds 

 to the 200 gallons. Up to the first of August we estimated that we 

 had 90 per cent free from codling moth injuries. At picking time 

 we estimated that the codling moth injuries amounted to about 

 371/2 per cent. 



As an insecticide, we could see no difference between the ar- 

 senate of lead and the Paris green. We prefer the arsenate of 

 lead, on account of its adhering qualities. Under this treatment 

 we were able to control scab fungus, the trees holding their foliage 

 until denuded by the process of nature. August the 20th we no- 

 ticed some bitter" rot in the orchard, but it developed slowly and 

 did not amount to over :^ of .01 per cent. 



The total cost of spraying the 350 acres with the liquid spray 

 six times was $655.32, or $1.87 per acre for the season; or 31 

 cents per acre per spraying. 



It required four horses and two men to operate each machine, 

 and they sprayed on an average of 32 acres per day of 10 hours. 



DUST SPRAY. 



On the 50 acres sprayed with dust, we commenced spraying 

 the same times as we did with the liquid spray, making five applica- 

 tions, the last spraying in the last week of July. The first, third 

 and fifth sprayings we used general formula, X strength, Paris 

 green. In the second and fourth sprayings we used general for- 

 mula, XX strength, Paris green. 



Under this treatment we controlled all chewing and eating 



