15 



§12 



"■ 9 



LLi 



zi 6 



-5 



o:: 



Q 

 UJ 



q: 



3 



3 - 



June 1-2,2004 



n small trees 

 D large trees 



S=^ 



TT 



2-8 10-16 18-24 26-32 34-40 42-48 50-56 

 DISTANCE FROM TRAP TREE (in yards) 



15 



12 



June 15-16,2004 



n small trees ^ 



D large trees 



T ' — hr" — ' 1 I — n 1 1 



TT 2-8 10-16 18-24 26-32 3440 42-48 50-56 



DISTANCE FROM TRAP TREE (in yards) 



Figure 2. For the side of orchard blocks having only one trap tree located at the center of the perimeter 

 row, amount of injury to perimeter-row fmit by PC on either (A) the first sampling date or (B) the second 

 sampling date, as a function of distance from a trap tree. Trap trees were baited with 4 BEN and 1 GA on 

 May 25-26, 2004. 



Materials & Methods 



This evaluation was conducted during May and 

 June, 2004, in 12 sprayed sections of eight commercial 

 orchards located in Massachusetts. Six of the orchard 

 blocks used had small (M.9 rootstock) trees, whereas 

 the remaining six blocks had large (M.7 rootstock) 

 trees. Each block was composed of one or more of the 

 cultivars Mcintosh, Gala, Delicious, Cortland, and 



Empire, among others. Each of the four sides of the 

 blocks used for this study was at least 120 yards long. 

 All trees within a block were sprayed with insecticide 

 against PC in a similar fashion. 



On May 25-26 (i.e., about 10 days after petal fall), 

 either, 1, 2, or 4 perimeter-row trap trees, each baited 

 with 4 BEN and 1 GA, were set up on each side of a 

 block; the remaining side of a each block had no trap 

 trees (Figure 1). The sides of the blocks to which a 



Fruit Notes, Volume 69, Fall, 2004 



15 



