Second-level Apple Integrated Pest Management: 



The Effects of Summer Pruning and a 

 Single Fungicide Application on 

 Flyspeck and Sooty Blotch 



Daniel R. Cooley, Wesley R. Autio, and James W. Gamble 

 Departments of Plant Pathology and Plant & Soil Sciences, 

 University of Massachusetts 



In a previous article [Fruit Notes 56(1):24- 

 26], we demonstrated that summer pruning 

 could reduce the incidence of flyspeck, a common 

 summer disease of apples. While it reduced the 

 incidence of flyspeck by half, summer pruning 

 alone did not reduce flyspeck to commercially 

 acceptable levels. Fungicides may be necessary 



to give adequate control; therefore, we initiated 

 this experiment to determine the effectiveness 

 of summer pruning alone or in combination with 

 a single fungicide application at reducing the 

 incidence of flyspeck and sooty blotch. 



In 1991, a group of mature Mclntosh/M.7 

 trees at the University of Massachusetts Horti- 



16 



Fruit Notes, Winter, 1992 



