298 MAINE AGRICULTURAL EXPERIMENT STATION. I907. 



time required to prepare the mixture is disregarded, the 3 

 double- sprayings would only take half the time of the 6 single 

 applications. 



At Foxcroft Plots 1 and 3 were sprayed July 18 and 27, 

 August 2, 9, 16 and 27. Plot 2 on July 18, August 2 and 16. 

 At Houlton Plots 1 and 3 were sprayed July 15 and 22, August 

 3, 10, 15 and 22. Plot 2 on July 15, August 3 and 15.* At 

 Foxcroft single nozzles applying about 45 gallons to a single 

 and 90 gallons to a double application were used for the first 

 3 sprayings, while for the last 3 sprayings double nozzles were 

 used, giving 70-75 gallons for single and 140-150 gallons for 

 double applications. At Houlton double nozzles applying about 

 80 gallons for a single application and 160 gallons for a double 

 application were used for all 6 sprayings. 



On account of the construction of the sprayers it was impos- 

 sible to adjust the nozzles to a sufficient height so that the 

 entire outer margins of the rows were protected after the tops 

 fully covered the ground. This difficulty was partly overcome 

 at Foxcroft and it doubtless explains, in part, the lower per- 

 centage of rot obtained there. At Foxcroft no blight was seen 

 until August 2.J when a little early blight was seen on^ Plot 2, 

 the others being entirely healthy. All of the plots were quite 

 well protected through the season. From September 11 

 until shortly after October 5 when the plants were killed by 

 frost, Plot 2 showed a small amount of late blight and some 

 early blight, though not enough of the latter to do any damage. 

 Occasional leaves affected with late blight could also be found 

 on Plot 3, but none on Plot 1. On Plot 1 the early blight was 

 almost entirely confined to marginal leaves where they were 

 imperfectly protected by the spray. There was about the same 



* On account of severe rains and the exceeding prevalence and destruc- 

 tiveness of the late blight during the first week in August it was thought 

 best to make an extra single application to Plot 2 which was originally- 

 planned to be double sprayed as near July 15, August 1 and 15 as possi- 

 ble. Accordingly Plot 2 at Foxcroft was gone over with a single appli- 

 cation on August 9. On account of not understanding the directions the 

 man in charge at Houlton made this application on August 8 not to Plot 

 2, but to Plot 3 which was to receive 6 single applications and came in 

 for its regular spraying on August 10. This probably explains why as 

 later noted there is considerable disagreemant with regard to the relative 

 results from these plots in the two localities. 



