--6 



fruit. Furthermore, neither the fruit size nor total yield was 

 influenced by the treatments (Table 1). 



Table 1. Effects of Promalin, applied at 125 gal/A when petals on 

 king blossoms started to fall, on Richared Delicious apples, 1976. 



Treatment 

 (rate/lOO gals) 



Fruit set (per 

 cm. limb circ) 



T/D 

 ratio^ 



Fruit 

 wt (gms) 



Yield 

 (bu/tre 



1. Check 



2. Promalin, 1/2 pt 



3. Promalin, 1/2 pt 

 + glyodin, 1 pt 



4. Promalin, 1/2 pt 

 + Triton, 1/4 pt 



5. Promalin, 1 pt 



5. 3a 

 6.0a 



5. Oa 



5.7a 



6. 6a 



1.01a 



1.01a 

 1.02a 



195a 



185abc 

 ISlbc 



13.8a 



14.8a 

 15.2a 



^L/D = Length/diameter ratio 



A trial was also conducted in a grower's orchard in 1976, 

 with 1/2 pint or 1 pint of Promalin applied when the petals on the 

 "king" blossoms on Starkrimson Delicious started to fall. The 

 results were similar to those reported in Table 1. Measurements of 

 the L/D ratios of the harvested fruit indicated that the Promalin- 

 treated fruit were longer than those from the check trees, but this 

 increase in length was not evident by visual observations of the 

 fruit while on the tree nor was there any significant increase in 

 fruit weight or yield. 



In 1977, Promalin at 1 pint per 100 gallons of water plus 1 

 pint of glyodin was applied at full bloom or calyx of Starkrimson 

 Delicious at the rate of approximately 150 gallons per acre. The 

 full bloom application was not effective whereas the fruit from 

 trees sprayed at calyx were heavier and longer. However, the 

 difference as in 1976 was too slight to be noticeable on the tree. 



Summary 



Both climatic and non-climatic factors can influence the "typi- 

 ness" of Delicious apples. Our most-typey Delicious are produced in 

 orchards on high elevations where post-bloom temperatures are apt to 

 be cooler than at lower elevations. However, temperatures are not 



