either in the outer or inner half of the tree canopy, with 

 foHage and fruit cleared to a distance of either 1 or 20 

 inches. There were six replicates of each treatment. 



Our third question was addressed in 2003 using 

 both Jersey Mac and Golden Delicious trees. Spheres 

 were either odor-baited or not baited. Spheres in Jersey 

 Mac trees were deployed either in the outer half of the 

 canopy with foliage and fruit cleared to a distance of 

 20 inches or in the inner half of the canopy with foliage 

 and fruit cleared to a distance of 10 inches. Spheres m 

 Golden Delicious trees were deployed in the outer half 

 of the canopy with foliage and fruit cleared to a distance 

 of either 20 or 40 inches. 



Once per week, captured AMF, other insects of 

 similar or larger size and debris were removed from 

 spheres. If necessary, Tangletrap was renewed, new 

 growth of foliage was pared back, and enlarging fruit 

 that encroached upon prescribed clearance distances 

 were removed. The sex of captured AMF was not 

 recorded in 2002 but was recorded in 2003. 



For each experiment, captured adults were 

 separated into three groups according to season of 



capture. For captures in Jersey Mac trees, groups were 

 mid-season (mid July to early August), late-season (early 

 to late August), and post-harvest (late August to mid 

 September). For captures in Golden Delicious trees, 

 groups were early-season (mid July to early August), 

 mid-season (early to late August) and late season (late 

 August to mid-September). 



Results 



For our first question, data reveal that over the entire 

 season in Golden Delicious trees, baited spheres with 

 foliage and fruit cleared to 10 or 20 inches captured 

 significantly more AMF than equivalent spheres having 

 foliage and fruit cleared to or 40 inches (Figure 1). 

 Captures on spheres having foliage and fruit cleared to 

 30 inches were not significantly different from either 

 group. This pattern characterized adult response to 

 sphere treatments during early, mid and late season 

 (Figure 1). 



For our second question, results show that across 

 the entire season in Jersey Mac trees, baited spheres 



200 



ElO inches 



DIG inches 



■ 20 inches 



30 inches 



^40 inches 



Early 



Mid 



Late 



Entire 



Figure 1. Mean number apple maggot flies captured per odor-baited sphere in Golden Delicious trees with 

 foliage and fruit cleared to a radius of either, 0, 10, 20, 30, or 40 inches around a sphere. Captures were 

 evaluated for early, mid, and late season and across the entire season. For the entire season, mean values 

 superscribed by the same letter are not significantly different at odds of 19: 1. 



16 



Fruit Notes, Volume 69, Spring, 2004 



