- ^4 - 



Table 2. Effects of corrective dormant pruning (COP), scoring, and Alar" 



on fruit size and yield of vigorous Red Prince Del ic ious/MMl 06. 



Fruit weight (g) Yield (kg/tree) 



Treatment IsW 1979 1980 1978 1979 TpO 



Light dormant pruning l88ab^ 192b l80a 80a l66a l66ab 



Corrective dormant 206a 212a l85a 8'4a 76c 156b 

 pruning (CDP) 



CDP + 1500 ppm 178b ^'♦c l63b 92a 100b lAOb 

 dam inoz ide 



CDP + scoring 200a l89bc l6lb 100a 13'*a l86a 



^Means within a column not followed by the same letter are significantly 

 different at the 5^ level. 



Another 3-year experiment was initiated in a block of 6-year-old 

 Cort1and/M7 trees that had not yet filled their allotted space. These trees 

 were scored once 2 weeks after bloom in 1978 and nothing else was done the 2 

 subsequent years. Scoring reduced trunk circumference increase all three 

 years and terminal growth the first two years (Table 3). Undoubtedly, one 

 of the reasons why scoring so effectively restricted growth on these 

 Cortland trees was that they were smaller than the Delicious, and reserve 

 food storage in the roots was limiting. 



Table 3. Effects of scoring on terminal growth and trunk circumference 

 increase on Cortland/M7 apples scored only in 1978. 



^Means within a column not followed by the same letter are significantly 

 different at the S% level. 



