SPRAYING OF SHADE TREES. 347 



Mfg. Co. of Seneca Falls, N. Y., have been in use for several 

 years at the Experiment Station and have given satisfaction. 



One of the best nozzles for spraying trees is the "McGowen," 

 made by J. J. McGowen, Ithaca, N. Y. For small trees or 

 shrubs, the "Vermorel" is excellent and may be obtained from 

 any pump manufacturer. 



The general appearance of the spraying apparatus mentioned 

 above is well shown in Plates XIV and XV, figures 14 and 15, 

 which were kindly supplied by Dr. E. P. Felt, Entomologist of 

 the State of New York. 



In reference to the cost of spraying trees, we cite the follow- 

 ing from page 21, Bulletin No. 20, Vol. 5, of the New York- 

 State Museum, "On the Elm Leaf-Beetle in New York State," 

 prepared by Dr. Felt, the State Entomologist: 



"Cost of Spraying Elms. I have taken some pains to ascertain 

 the precise cost of spraying per tree in the hope of encouraging 

 those to whom this would be a serious item. It is pleasant 

 to record that the expense is much lower than I had supposed. 

 Dr. Smith, of the New Jersey Agricultural Experiment Station, 

 has kindly supplied the following data. The elms on the col- 

 lege campus at New Brunswick are 50 to 75 feet high and were 

 sprayed at odd times by the janitors, it requiring about an hour 

 or two with force pump, tank and ladders to treat one tree. 

 The poison necessary for each spraying was worth about six 

 cents. It will thus be seen that the cost per tree would be 

 between 36 and 56 cents, varying with the price of labor. In 

 the city of New Brunswick the trees were sprayed at a contract 

 price of one dollar for the season, the understanding being that 

 they were to receive three treatments if necessary. The con- 

 tractor prepared the outfit, furnished the material, did the spray- 

 ing at the price mentioned and had a neat margin remaining. 



Mr. Kirkland, Assistant State Entomologist of Massachusetts, 

 has kindly supplied me with the following figures. A grove of 

 over 200 red and white oaks ranging in height from 40 to 70 

 feet were sprayed once at an expense of 49 cents per tree. In 

 this instance arsenate of lead was used at the rate of 20 Ibs. to 

 150 gallons of water, a considerably stronger mixture than 

 would be necessary for the larvae of the elm-beetle. In addition, 

 he estimated the expense of spraying smaller trees, 20 to 40 

 feet high, at 15 to 20 cents per tree. 



The cost of spraying the elms in Albany this season, aside 

 from wear and tear of the apparatus, is considerably less than 

 the figures above given. The trees present a wide range in 

 size, although the majority are from 50 to about 70 feet in 



