REPORT OF THE STATE ENTOMOLOGIST I9II 17 



a concentrated lime-sulfur wash (31° Baume) to each 150 gal- 

 lons. The pressure was maintained at from 150 to 160 pounds. 

 The spraying was from the ground, the hose being tied to long 

 bamboo rods and the nozzles were of the later Friend type with 

 apertures which had been worn somewhat by earlier work with 

 a lime-sulfur wash and the spray was therefore rather coarse. 

 Plots I, 2 and 3 and the barrier trees on plot 4, in which latter 

 were located the check trees, were thoroughly sprayed at this 

 time. 



Plots 2 and 3 were sprayed a second time June 8th and the 

 four trees comprising plot 4 for the first and only time on the 

 same day. The weather conditions were perfect, there being 

 a light northwest wind. The material was the same as em- 

 ployed in the earlier application. The entire orchard was then 

 in fine condition. There had been a little burning by the spray 

 on some of the northern spy trees but nothing of the kind was 

 observed on the Baldwins in the experimental plots. Many of 

 the branches showed six or more inches of new growth. Aphids 

 were more or less abundant but not present in sufiiciently large 

 numbers to cause serious damage, though a few injured apples 

 were noted in plot 2. Some of the fruit was more or less in- 

 jured by a green fruit worm or Cacoecia larva. Seven injured 

 apples were picked from tree 2 B and as many from one of the 

 barrier trees in the plot. 



The third application to plot 3 was made July 26th, three 

 gallons of spray being used for each tree and an average of a 

 minute being required for the treatment of each tree. An ex- 

 amination at this time showed almost no wormy apples on plot 

 I, even in the case of trees sprayed just before the rain. Prac- 

 tically the same conditions obtained in plots 2 and 3. 



September 28th the spray material was very perceptible and 

 in some instances rather abundant upon the foliage. There was 

 much more russeting or burning of the fruit on plot 3 and the 

 injured areas (plate 6) were checking considerably. 



A tabulation of the data is given below. 



