benzaldehyde) is increased, as found in the field 

 studies. As mentioned, the amount of benzaldehyde 

 used in the field studies was increased from 2.5 mg/ 

 day (in 2001) to 10 mg/day (in 2002), which seems to 

 have overcome negative effects of the presence of 

 insecticide on the trap surface. 



Based on our findings, we conclude that (1) 

 unsprayed cylmder or small pyramid traps may be more 

 effective in capturing PCs than sprayed cylinder or 

 small pyramid traps, and (2) even though Circle traps 

 may offer more promise for capturing PCs than 

 unsprayed cylinders or small pyramids, other 

 approaches to monitoring PC, such as an 'odor-baited 



trap tree' approach (see the 2002 winter issue of Fruit 

 Notes), may be much more rewarding. 



A cknowledgm ents. 



We thank Joe Sincuk for aid in both the scheduling 

 and execution of the insecticide applications and Phillip 

 McGowan for technical aid. This study was supported 

 with funds provided by a USDA Northeast Regional 

 IPM grant, a Hatch grant, a grant from USDA Crops at 

 Risk program, and the New England Tree Fruit 

 Research Committee. 



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12 



Fruit Notes, Volume 67, Fall, 2002 



