178 MAINE AGRICULTURAL EXPERIMENT STATION. I915. 



SO as to make 47 rows of 6 trees to the row. \A'ith the exception 

 of plot I which was made up of 3 rows or 18 trees, each plot 

 consisted of 24 trees in 4 parallel rows. 



The trees under experiment are now in a very thrifty condi- 

 tion, for they have received good care for the past 5 years. 

 Some renovation work was done on them in 1909, but previous 

 to that for several years they had been badly neglected. On 

 account of increasing the number of plots it has been necessary 

 to utilize some trees which were less thrifty than the average 

 in this part of the orchard when the Station took charge of the 

 farm and which are consequently still somewhat inferior to the 

 others. In 1914 this more particularly applied to plots 11 and 

 12. and to a less extent to plots 8, 9 and 10. 



TREATMENT OF THE PLOTS. 



The following is the spraying treatment outhned for each 

 separate plot. The dates of application are given on page 182. 

 Plot I. Bordeaux mixture, 3-3-50 formula, plus one pound of 



dry arsenate of lead to 50 gallons. 

 Plot 2. First application like plot i ; later applications 2 pounds 



of dry arsenate of lead to 50 gallons of water. 

 Plot 3. First application lime-sulphur 20 per cent stronger 



than standard dilution* plus one pound of dry 



arsenate of lead in 50 gallons ; later applications like 



plot 2. 

 Plot 4. Standard dilution lime-sulphur plus one pound of dry 



arsenate of lead in 50 gallons. 

 Plot 5. Like plot 4 with the first application omitted. 

 Plot 6. "Soluble sulphur" three-fourths pound and one pound 



of dry arsenate of lead in 50 gallons of water. 

 Plot 7. "Atomic sulphur" 7 pounds and one pound of dry 



arsenate of lead in 50 gallons of water. 

 Plot 8. Standard dilution lime-sulphur plus 2 pounds of cop- 

 per sulphate and one pound of dry arsenate of lead 



in 50 gallons. 



*By standard dilution is meant the equivalent of a i to 40 dilution of 

 a 32" Baume lime-sulphur concentrate. For a 20 per cent stronger 

 dilution, one-fifth more of the concentrate was used for making a given 

 amount of spray than was used for making the standard dilution. 



