- 8 - 



The Findings : 



Captan 50 W, 2 lbs - alone and with No Scald* 2 lbs, or with 

 Stop Scald* 1 pint, reduced blue mold rot a little, but not enough 

 to talk about. Anti-scald properties were not adversely affected. 



Difolatan* 4 Flowable 1 pint was tested without anti-scald 

 materials. There was about as much blue mold rot as from water 

 without fungicide. 



Polyram* 80 W 2 lbs 

 There was more blue mold 



was tested without anti-scald materials 

 rot than from water alone. 



Benlate* 50 W 1 lb - Reduced blue mold rot on Mcintosh to 3% 

 compared to 29% from water dip without fungicide; and on Cortland 

 to 0% compared to 53% from water dip alone. It did not interfere 

 wi th seal d control . 



Benlate* 50 W 1 lb was the only one, of the 4 fungicides 

 tested, that gave satisfactory blue mold control. 



Benlate* is not yet registered for use in post harvest treat- 

 ment of apples. It does have a temporary permit "For Experimental 

 Use Only," as a post harvest treatment for fruit rot control and 

 a 7 ppm residue tolerance which permits marketing of the fruit if 

 the tolerance is not exceeded. 



*Trade name 



*************** 



POMOLOGICAL PARAGRAPH 



CA storage requirements of several apple cultivars 



cul ti vars (varieties) have the same atmospheric an 



quirements for CA storage. Howeve 



Cortland and Macoun apples in "har 



while Mcintosh rooms operating at 



able. In "hard" rooms these 2 cul 



cessive amounts of internal and ex 



injury shows up as dry, brown area 



cularly around the core. External 



pressed yellow or brown areas on t 



issafer to store Cortland and Mac 



38 F, than to store them in "hard" 



Not all apple 



e atmospheric and temperature re- 

 r, it is not uncommon to find 

 d" rooms (2% CO^, 3%^09 and 32°F) 

 5% CO2, 3% O2 and 38°F^are avail- 

 tivars occasfonally develop ex- 

 ternal CO2 injury. Internal COj 

 s or pockets in the flesh, partT- 



injury appears as wrinkled, de- 

 he green side of the fruit. It 

 oun apples 



rooms . 



at 5% CO2, 3% O2 and 



For those who desire long-term storage of Spartan and Idared 

 apples, we suggest placing them in "hard" rooms. Spartan apples 

 store best in "hard" rooms and have pressure-tested 14-15 lbs in 

 May. Idared apples are subject to a physiological disorder, known 

 as Jonathan spot. This disorder can be commercially controlled by 

 storing the apples in "hard" rooms. 



Preliminary tests indicate that Empire stores well in "hard" 

 rooms, but our observations with this cultivar are limited. 



*************** 



