Figure 2. In July and August of 1998, abundance of A. fallacis mite predators on leaves sampled from thiird 

 level IPM blocks (in wfiich 7" pyri were released on the center tree in rr\\d-May 1997) and first-level IPM 

 blocks (in which no releases of T. pyri were made). 



Legend: 



Firsl-Level IPM Blocks. Low Tree Density 



Sample Dale 



First-Level IPM Blocks. Medium Tree Density 



Sample Date 



First-Level IPM Blocks, Higti Tree Density 



Sample Date 



Center Tree 



Center Row, Outer Trees 



Outer Row, Center Trees 



center tree, 15 leaves from each of the two outer- Geneva, New York for the identification and count- 

 most trees in the center row, and 15 leaves each ing of pest and predatory mites. In all, more than 

 from the center tree in each of the two outermost 12,000 leaves were sampled in 1997 and more than 

 rows. The leaves were sent by overnight mail to 16,000 in 1998. 



12 



Fruit Notes, Volume 64 (Number 1), Winter, 1999 



