EXrERIMENT STATION^ EEPOET. 565 



it was deemed wise to re-spray them as soon as the first hirvas were 

 noticed. 



The resnlt was all that conld be reasonably desired. A large 

 proportion of the trees w-ere practically nnharmed, while none were 

 sufficiently injured to cause a dropping of leaves or any marked 

 disfigiiring. This was in strong contrast to other elms in the vicin- 

 ity, which were completely defoliated before midsummer and did 

 not become recovered until fall, when a second crop of foliage was 

 made. 



Three different makes of arsenate of lead were used, ranging in 

 price from thirteen cents to eighteen cents per pound, and so far 

 as results were concerned, no difference was noted. In no case was 

 there any burning of foliage, no matter how excessive the applica- 

 tion, and in all cases the foliage was protected during the entire 

 season. 



The object of the record was not so much to determine the kill- 

 ing power of the poison, for that has been sufficiently demonstrated, 

 as to show that practically large trees on a limited area could be 

 completely protected while unsprayed trees around about were 

 badly injured. It ^^■as further intended to show that even a single 

 spraying might be sufficient to protect, provided the application was 

 made early enough, or before eggs were deposited. It is probable 

 that it was not really necessary to spray a second time even those 

 trees on which egg clusters were present in numbers, but as there 

 had been a day of rain just after these trees were first sprayed, it 

 was deemed wiser to take no risks. 



£ast Orange. 



This city also has a shade tree commission as complete in its 

 organization as tliat of Xewark, and second to it only in the extent 

 of its operations. The secretary and superintendent of this com- 

 mission is Mr. William Solotaroff, and he has handled a somewhat 

 different problem equally well. At my request he has furnishetl a 

 summary of the work of the season of 1906, as follows : 



"The insect that gave us the most concern this year and last was 

 the Pseudococcus aceris on the sugar maple. In 1905 it was a pest 

 here of the worst fonn. On August 1st, 1905, we sprayed the 

 trunks and main limbs of some of the trees, and I found that the 



