1). We inspected five fruit per sampling 

 location (sector), recording the number of 

 oviposition scars found on each fruit. Fruit 

 inspection was conducted according to the 

 schedule presented m Table 1 . Fruit within 

 a sector were sampled randomly on each 

 sampling date. During the first two sam- 

 pling dates, sampled fruit were nustakenly 

 picked from small and medium trees. There- 

 after, fruit were inspected in situ and re- 

 mained on tree branches. 



Results are presented in the form of 

 mean number of oviposition scars per fruit 

 and also as percentage of total fruit injured 

 (fruit having at least one PC scar). Data 

 were averaged across the number of repli- 

 cates (trees) that comprised each treatment 

 (tree size). Fruit were sampled on five dates 

 for medium trees, and on three dates for 

 small and large trees (because of the dev- 

 astating impact of apple scab in mid- to late- 

 June). 



Results 



Branch level. Distribution of PC damage 

 according to branch level for each tree size 

 and sampling date is depicted in Figure 2. 

 For small trees, fruit damage was about the 

 same for low, middle and top levels on each 

 of the three sampling dates. For the first 

 sampling, 3-8% of the fruit inspected had 

 at least one oviposition scar. Percentages 

 of fruit having one or more such scars in- 

 creased gradually until reaching a maxmium 

 of 53-66% on the third (and last) sampling 

 date. For medium trees, on the first sam- 

 pling date, there were numerically but not 

 significantly more PC scars on those fruit 

 located at the top of the canopy. For sam- 

 pling dates 2 and 3, oviposition scars were 

 about evenly distributed among levels 

 within the canopy. For sampling date 4, 

 there were numerically but not significantly 

 fewer scars near the top of the canopy, and 

 during sampling date 5, fruit damage was 

 significantly least at the top of the canopy. 

 Percentages of fruit having at least one PC 

 scar ranged from 6- 1 6% for sampling dates 

 1 and 2, and increased substantially on the 



SAMPLE I 



5 6 



I 



SAMPLE 2 



9 i; 

 1 I 



Small 



Medium 



SAMPLE 3 



Medium 



■ Top 

 D Middle 

 D Bottom 



a 



33 b 



21 C 



Large 



57 



Hi 



Large 



Large 



Figure 2. Distribution of the number of PC oviposition scars on fruit 

 of small, medium and large trees according to branch level. Numbers 

 above bars represent the mean percentage of fruit having at least one 

 PC scar. Different letters above bars indicate significant differences 

 among treatments at odds of 19:1. For sampling dates, see Table 1. 



Fruit Notes, Volume 65, 2000 



37 



