Third-level, Low Tree Density 



4 



1-Jul 



— T 



2-Sep 



1997 



1998 



-1999 



Third-level, High Tree Density 



■ - 1997 



1998 



-1999 



First-level, Low Tree Density 



1997 



■1998 



-1999 



First-level, Medium Tree Density 



- 1997 1998 



-1999 



Figure 4. In 1997, 1998, and 1999, abundance to A fallacis mite predators on center trees of third-level IPM 

 blocks (in which T. pyri were released on center trees in mid-May 1997) and center trees of first-level 1PM blocks 

 (in which no releases of 7" pyri were made). 



10 



Fruit Notes, Volume 65, 2000 



