Evaluation of Host-odor Compounds 

 for Attractiveness to Plum Curculio 

 Adults: 2000 Results 



Ronald Prokopy, Starker Wright, Russel Fleury, Shawn Mclntire, & Kristen Hanley 

 Department of Entomology, University of Massachusetts 



Larry Phelan and Richard Barger 



Department of Entomology, Ohio State University 



As repoi'ted in the suninier 1999 issue of Fruil Notes, setts and Ohio. PCs frequently drop from host tree canopies 

 56 compounds have thus far been identified as components to the ground and may encounter odor from a nearby baited 

 of odor of plum or apple fruit at its most attractive stage to trap. Each trap was baited with a single compound at a single 

 plum curculio (PC). Results 

 presented in that report 

 showed that of 30 such com- 

 pounds evaluated, 1 3 proved 

 attractive to PC at either a 

 high, medium or low release 

 rate of compound. 



Here, we describe re- 

 sults of 2000 tests in which 

 these 13 compounds (plus 

 four others from 1999) were 

 re-evaluated for attractive- 

 ness to PC along with 1 1 

 other host-odor compounds 

 evaluated for the first time. 



Materials & Methods 



Each compound was in- 

 troduced into a high-density 

 polyethylene vial (VWR 

 Chemical Incorporated) and 

 assessed at three different 

 release rates so as to create a 

 very low, low, or moderate 

 amount of odor concentra- 

 tion in the surrounding air. 

 Desired release rates were 

 achieved by varying the num- 

 ber of vials used per trap and 

 were approximately 0.4, 2.0, 

 and 10.0 milligrams of odor 

 per day. 



Compounds were 

 evaluated in association with 

 yellow-green boll weevil 

 traps placed on the ground at 

 the edge of unsprayed apple 

 tree canopies in Massachu- 



30 



Fruit Notes, Volume 65. 2000 



