plant bug injury observed in each of the twenty 

 cultivars, expressed as the percent injured, 

 unmarketable fruit. Significant and relatively 

 consistent differences were observed over the 

 two years of the study. Honeoye had the lowest 

 amount of injury during both years. Sparkle, 

 Veestar, Annapolis, and Canoga also had low 

 amounts of injury. Kent, Mic Mac, Scott, 

 Blomidon, and Redchief had the highest levels of 

 injury, while Guardian and Allstar consistently 

 fell into the middle range. The other cultivars 

 did not show a consistent trend over the two 

 seasons. 



Cultivars which were less susceptible to tar- 

 nished plant bug, such as Honeoye and Sparkle, 

 also had the highest marketable yields when 

 compared to susceptible cultivars such as Mic 

 Mac and Blomidon. Kent was an exception to 

 this rule, however, having both high amounts of 



injury and high marketable yields. This result 

 probably is related to the exceptionally large 

 number of fruit this cultivar produced. 



There was no apparent relationship be- 

 tween the amount of tarnished plant bug injury 

 and the time of ripening for the different culti- 

 vars. Resistant and susceptible types occurred 

 among both early and late ripening cultivars; 

 however, damage appeared to be more preva- 

 lent on the later ripening fruit within each 

 cultivar, i.e. tertiary and quaternary fruit on 

 each plant seemed to have more injury. 



There may be some genetic relationship as- 

 sociated with the apparent resistance found in 

 this study. Honeoye and Canoga, which were 

 resistant to tarnished plant bug, both have 

 Holiday as a parent, which in a non-replicated 

 trial had the lowest injury of any cultivar stud- 

 ied. Sparkle also showed resistance in this 



Fruit Notes, Winter, 1992 



