112 State Horticultural Society. 



Prof. H. E. Summers, of Iowa Agricultural College, says : "I 

 very much hope we can stop the use of the Haseltine moth trap for 

 codling moth." 



Newark, Del., Januar}^ 2, 1902. 

 Mr. L. A. Goodman: 



On August 5, about 9 p, m., I let out a Codling Moth in my sitting 

 room. It flew^ to a large Rochester lamp as I let it out within four or 

 five feet of the lamp, circled around the lamp once and flew to another 

 part of the room. It did not return to the lamp that evening. Now 

 a Cutworm moth, or any moth which is attracted to lights, as every 

 one has observe4, will not only be attracted by a light, but will come 

 back to it again and again. On August 7 I let out twelve moths, fifty 

 ■or sixt}^ feet from the Haseltine trap light as on August 5, three plum 

 trees intervening between the point and the light. I found but one 

 •Codling Moth in the pan the next morning, and that one I observed 

 to fly to the light within a couple of minutes after it was released. 

 On another evening I let out a half dozen moths about fifty feet from 

 .a light and failed to catch any'. 



These experiments prove to my mind quite definitely that Codling 

 INIoths are only attracted to light at a distance of ten to twenty feet,, 

 that then attracted to it onl}- when suddenly released and unused to 

 the light, as those which I note flew to the light at once were not 

 subsequently attracted to it. 



Therefore, I am decidedly of the opinion that such trap lights 

 would fail to catch any considerable number of Codling Moths unless 

 placed so close together in an orchard as to make it entirely too ex- 

 pensive. 



I am more convinced of the futility of the use of these lights by 

 spraying experiments conducted by me this season in which 90 per 

 cent, of the whole seasons crop, and 96 per cent, of the picked fruit 

 A^vas perfect fruit. Surely trap lights can not give such results. 



Very truly yours, 

 E. DWIGHT SANDERSON, 



Entomologist. 



'&' 



Prof. Forbes, State Entomoligist of Illinois, and Entomologist 

 of the Experiment Station, and Professor of Entomology in the Agri- 

 cultural College, says: "I have received several inquiries concerning 

 the Haseltine moth catcher, accompanied by their ludicrously ignorant 

 •circular ;" and Prof. Slingerland, Entomologist to the Cornell Uni- 

 versity Experiment Statjon, in his article on the moth catcher in the 

 Rural New Yorker for January 19th, says : "Most of the claims made 

 for this new moth catcher or trap in the advertising circulars are pre- 



