178 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 5 



lem as those in eastern Massachusetts and it should be a source of 

 congratulation to such that most of the pests which I have mentioned 

 have not yet made their appearance. It should be a warning, how- 

 ever, and the facts should be taken advantage of before these pests 

 appear, for, if the city or town trees are well cared for, they will be in 

 condition to resist some of their enemies, particularly bark borers 

 which usually attack the unhealthy trees. Furthermore, if the work 

 is in proper hands, it will be comparatively easy to discover the pres- 

 ence of serious pests even when they occur in small numbers and by 

 applying immediate treatment the trees can be preserved. 



The whole problem is one which should be given careful thought 

 and attention in each community. Local public sentiment, however^ 

 is absolutely necessary if progress along this line is to be made. 



President F. L. Washburn : A discussion of these two papers 

 by Mr. Herrick and Mr. Burgess is now in order. 



P. J. Parrott: I wish to express my appreciation of this paper^ 

 and to say that it is gratifying to hear of these promising results in 

 spraying because the elm leaf miner has been very prevalent in New 

 York State. Recalling the experiments on the case bearers on larch, 

 I would like to say that in the spraying of apple orchards we believe 

 we have obtained similar results with lime-sulphur wash on the com- 

 mon case bearers on apples. 



Glenn W. Herrick: Mr. President, just one further word. I 

 want to say also that in an experiment to control a bud worm of the 

 pecan, in the South, which lives over winter in hibernacula on the 

 branches, close to the buds, I obtained similar results by spraying 

 with lime-sulphur. 



E. D. Sanderson: Mr. President, I would like to ask what is the 

 cost of one of those outfits, and about what is the cost per tree for 

 the regular spraying? 



A. F. Burgess: The cost for an outfit, the original investment, 

 for a high power machine, is about a thousand dollars. Professor 

 "Herrick can tell you the cost of the other machine. 



Glenn W. Herrick: We paid $200 apiece. 



E. D. Sanderson: What does it cost you per tree? 



A. F. Burgess: These facts are very difficult to get at because 

 the spraying is done by town gangs. Some are efficient, — some less 

 so,— but in the city of Newton, where they have about fifty miles 

 of shade trees, they sprayed and cared for last year nearly 3,000 large 

 trees. They used arsenate of lead at the rate of ten pounds to the 

 hundred gallons, and it cost about fifty cents per tree for one spraying, 



