as Fuji, Golden Delicious, or Delicious comprise the 

 perimeter rows that face woods or hedgerows, which 

 are more likely to be colonized by immigrant AMF 

 than are perimeter rows facing open field (see following 

 article). Our previous work has shown that AMF 

 control using perimeter-row traps is better on smaller, 

 high-density trees than on larger, low-density trees. 

 Results given m the preceding article and here suggest 

 that cultivars such as Fuji (in particular) but also 

 Golden Delicious and Delicious are highly or at least 

 moderately attractive to (or arresting oQ AMF but are 

 relatively low in susceptibility to AMF oviposition. In 

 concept, immigrant AMF would preferentially 

 accumulate on these cultivars and have a high 

 probability of being eliminated by traps before laying 

 eggs in the comparatively non-susceptible fruit or 

 moving toward the interior of the orchard. Conversely, 

 an architectural arrangement that is likely to be 

 minimally conducive to AMF control using perimeter- 



row traps might be one where cultivars that are both 

 highly attractive to (or arresting of) AMF and highly 

 susceptible to AMF oviposition (e.g.. Gala, Jersey Mac, 

 Tidemann Red) are planted on perimeter rows, 

 especially where perimeter rows border woods or 

 hedgerows. 



A ckn o wledgem en ts 



We thank Dave Cheney, Tom Clark, Dave Shearer, 

 Joe Sincuk, Tim Smith, and Bob Tuttle for allowing us 

 to use their orchards. We are grateful to Monica 

 Elmore, Beata Rzasa, Jaime PiDero, Anthony Minalga, 

 Alejandro Garza, Brian Hogg, Gianumberto Accinelli, 

 Susan Nixson, Katie Bednaz, Amanda Ross, and Steve 

 Lavalee for excellent technical assistance. This work 

 was supported by USDA National Research Initiative 

 Competitive Grant 95-COOP- 1-0482, and a USDA 

 Northeast Regional Competitive LPM grant. 



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24 



Fruit Notes, Volume 66, 2001 



