mites if pest mite levels warrant treatment. Through 

 continuing study, we may be able to determine if we 

 can predict some pest mite control by A fallacis the 

 followingyear. Prediction could be based on weather 

 conditions, pest to predator ratios in September, 

 groundcover composition, or some other variable. 

 Our results to date, however, indicate that the pros- 

 pects are not strong for continuous biological control 

 of pest mites from one year to the next following a 

 single release of A fallacis predators. 



Acknowledgements 



The work in 1990 was supported principally by 

 a grant to study biological control of apple orchard 

 pests from the Massachusetts Department of Food 

 and Agriculture. We thank the participating grow- 

 ers for their cooperation: Bruce Carlson, Dave 

 Chandler, Dave Cheney, Tony Lincoln, Harvey and 

 Marvin Peck, Wayne and Jesse Rice, Steve 

 Smedberg, and Maurice Tougas. 



From: Thomm. J.J. 1906. The American Fruit 

 Culturist. Orange Judd Company, New York. 



12 



Fruit Notes, Winter, 1991 



