immigrants or Re-coionizers? 

 Studying Pium Curcuiio IVIovement 

 Using Odor-baited Traps 



Jaime Pinero and Ronald Prokopy 



Department of Plant, Soil, and Insect Sciences, University of Massachusetts 



In the preceding article of Fruit Notes, we 

 presented results of a 5-year study aimed at establishing 

 the relationships between timing of plum curcuiio (PC) 

 immigration, weather factors, and phenological tree 

 stage. One of our findings was that most PCs (59% on 

 average) were captured by traps by the end of the petal- 



fall period, with the remaining 4 1 % being captured after 

 petal fall. Therefore, an important aspect to consider 

 because of its implications for management is whether 

 those PCs captured after petal fall are either immigrants 

 or re-colonizers. One way of addressing this and other 

 questions concerning PC immigration and movement 



Figure 1. Unsprayed section of the commercial orchard used for tliis study (UMass Cold Spring 

 Orchard Research & Education Center, Belchertown, MA). Hollow circles represent the 12 release 

 points of color-marked PCs beneath perimeter-row trees. Dashed circles represent the 48 points at 

 which color-marked PCs were released (at 3, 6, 13, and 24 yards inside the woods) in 2002. Picture 

 courtesy of Jon Clements (UMass Extension). 



Fruit Notes, Volume 69, Fall, 2004 



