Table 5. Mean numbers of male PCs moving to within 1/2 inch or onto cotton bags of each 

 treatment in which odor of grandisoic acid, either low (1) or high (h) dose, was included in at 

 least one treatment per arena. 



* Means within rows not followed by the same letter are significantly different at odds of 19:1. 



Table 6. Mean numbers of female PCs moving to within 1/2 inch or onto cotton bags of each 

 treatment in which odor of grandisoic acid, either low (1) or high (h) dose, was included in at 

 least one treatment per arena. 



Arena 



Treatments 



* Means within rows not followed by the same letter are significantly different at odds of 19:1. 



with plums at both the low and high dose in Arenas 

 Three and Four, respectively. 



Female Responses to Grandisoic Acid. Females 

 responded in significantly greater numbers to 

 grandisoic acid than to controls at a low dose in Arena 

 One but not at a high dose in Arena Two (Table 6). 

 Statistically equal responses were recorded for females 

 to plums alone and grandisoic acid held with plums at 



both a low or high dose in Arenas Three and Four, 

 respectively. 



Conclusions 



We conclude that females produce an odor that is 

 attractive to males, but attraction occurs only when 

 females are feeding on plums. Although females were 



Fruit Notes, Volume 64 (Number 3), Summer, 1999 



