22 MAINE AGRICULTURAL EXPERIMENT STATION. I912. 



The material used was supplied by the Station and consisted 

 'Of the lime-sulphur concentrate and arsenate of lead used in 

 the first two sprayings at Highmoor. It was, therefore, used 

 at the same dilution as in plot C (p. 9). This also holds true 

 for the other experimental plots in Greene. 



The first application on May 16 occurred before blossoming, 

 although closer to that period than would generally be recom- 

 mended. Two or three days earlier would have been more 

 seasonable, had conditions permitted. No darnage, howevei, 

 resulted to the buds just ready to open. The second applica- 

 tion was on May 31 and the third on June 16. 



The spraying in this experiment could not be carried on 

 under circumstances approaching ideal conditions. Power was 

 obtained from the ordinary hand'-pump barrel sprayer, and the 

 short spray rods and hose did- not permit easy access to the 

 large trees or allow such effective work as was desired. 



Results. No spray injury was noted in this orchard at any 

 time during the season. The same conditions that made for 

 healthy foliage and clean fruit at Highmoor obtained here. 

 Some slight insect injury was noted, and this was more severe 

 on the unsprayed than on the sprayed trees. On the former 

 browntails were decidedly in evidence. 



A very slight amount of scalded fruit was first noted on 

 August 30. This orchard, as well as the next one to be con- 

 sidered, was markedly free from this injury. This is doubtless 

 due to the fact that the tops were fairly dense and the fruit 

 well protected from the sun. 



The data for this orchard was taken under handicaps ; no 

 assistance was available to the writer, owing to the great scar- 

 city of labor at this particular time. In view of this fact, and 

 of the absence of scab and sunscald, coupled with the limited 

 amount of time, indicative rather than exact data had to be 

 taken. For this over 2000 apples from the sprayed plot and an 

 almost equal number from the unsprayed trees were selected 

 at random from different parts of the barrels. These were 

 examined solely for insect injury. 



The results as given in the combined tables for the coopera- 

 tive work (p. 25) will show a ratio of sprayed to unsprayed 

 fruit of 9 to 24 percent respectively. The percent of the 

 sprayed fruit is higher than need be, even considering the pos- 



