EXPERIMENT STATION REPORT. 607 



these scale destroyers were themselves destroyed by the ants to such 

 au extent as to render them ineffective as aids to the fiiiit growers. 

 ■^'Tanglefoot" applied in a continuous band around the trunk 

 formed a barrier which could not be passed by the ants, the scale 

 destroyers were free to develop undisturbed, and this resulted in a 

 marked decrease of pernicious scales with a promise of their total 

 (elimination. Reports from growers and inspectors were unifonnly 

 to the effect that "Tanglefoot" caused no injury to the banded 

 trees, and correspondence with the Massachusetts users failed to 

 show any case of ol>vious injury caused by the material. 



To put the matter to a direct test in 'New Jersey, the manufac- 

 turers sent me, early in the season, four buckets of "Tanglefoot," 

 which were sent to Horace Roberts, Moorestowii, Burlington 

 county ; John S. Collins, Moorestown, Burlington county ; Henry 

 Pfeiffer, Cologne, Atlantic county, and Joseph H. Black, Son & 

 Qompany, Hightstown, Mercer county. 



To each of these parties a letter was sent explaining the pur- 

 port of the experiment, and they were asked to make the necessary 

 observations. 



Mr. Horace Roberts used the material on apple trees of good 

 size and in bearing condition. When seen by Mr, Dickerson dur- 

 ing the summer there was no sign of injury to the trees and no 

 Appearance of any beneficial eft'ect as against the scales. 



Under date of November 3d, Mr. Roberts wrote that " 'Tangle- 

 foot' still sticks to the trees, but I do not see that it hurts them at 

 iill. I am unable to tell whether it helps with the scale or not, for 

 the scale is a very rare bird here now." 



Mr. John S. Collins reported, October 26th, that he had used 

 the "Tanglefoot" on peach, pear and apple. There was no appear- 

 ance of injury at that time, and, on the other hand, no apparent 

 benefit had been derived, so far as lessening scale injury is con- 

 cerned. The material remained sticky enough to prevent insects 

 from crossing it for some time after it was applied, but at the 

 time of the report it had hardened so that it could be readily 

 crossed by any species. 



Mr. Henry Pfeiffer reported, under date of ISTovember 1st, that 

 ■on June 1st he had applied the "Tanglefoot" in a band ten inches 

 wide and one-quarter inch thick to one cherry, one apple, one 

 peach, two pear, one quince, one chestnut, one tulip tree and one 



