6 - 



Correlation between increased leaf nitrogen and severity of 

 ru!^set was positive in both 1966 and 1968. For each increase of 

 0.1c' in leaf nitrogen in the year preceding the crop, russet in- 

 creased 5.8% in 1966 and 4.1% in 1968. The preliminary data sug- 

 gest that russet of Golden Delicious becomes objectionable when 

 leaf nitrogen is increased above 2.0%. As seen in Table i, the I 



or untreated) level was 2.00 in 1965 and 1.97 in 1967 



C 

 nega t i 

 preced 

 The pr 

 era te 

 decrea 

 In thi 



M 

 f 3 sed 

 s :n 1 h 

 of the 

 Of the 

 crease 

 t i n t 



orrel at 

 ve . Fo 

 i n g the 

 el imi na 

 i n c r e a s 

 ses bel 

 s orcha 



uch of 

 on the 

 nct-1 i 

 surf ac 

 surf ac 

 in r u s 

 1 osse 



1 on 

 r ea 

 cro 

 ry r 

 es i 

 ow 1 

 rd, 



this 

 Unit 

 ke r 

 e; F 

 e; U 

 seti 

 s i n 



betwee 

 c h i n c 

 p , rus 

 esul ts 

 n 1 eaf 

 .9% po 

 the K^ 



russe 

 ed Sta 

 usseti 

 ancy , 

 tility 

 ng mig 



eye-a 



n increased leaf potassium and russet was 

 rease in leaf potassium of 0.1% for the year 

 set decreased 1% in 1966 and 2.3% in 1968. 

 indicate that at about 1.9% potassium, mod- 

 potassium should reduce russet and that 

 tassium should produce increased russet, 

 level was 1.58 in 1965 and 1.78 in 1967. 



ting was of the smooth net-like condition. 

 tes Standards for Apples, the allowances for 

 ng are as follows: Extra Fancy, up to 5% 

 up to 15% of the surface; No. 1. ud to 25% 

 , up to 100% of the surface. Thus, an in- 

 ht result in a reduction in grade in addi- 

 ppeal and storage life. 



Color: In both 1966 and 1968, increasing leaf nitrogen above 2.0% 

 reduced the oer cent yellow color. In contrast, increasing leaf 

 potassium above 1.9% slightly increased the per cent yellow color. 



Thi s prel iminary report may serve as a guide for growers of 

 Golden Delicious who have submitted leaf samples for chemical anal' 

 ysis. Russet is likely to increase and yellow color decrease if 

 Ipaf nitrogen is increased above 2.0%. Russet may be decreased 

 and yellow color increased by increasing potassium above 1.9%. 



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



A LOOK AT THE VARIETY McINTOSH 



C. Lyman Calahan, Extension Horticulturist 

 University of Vermont 



Not too Mery long ago, we frequently heard Mcintosh producers 

 talking about the need for another good variety to follow or to re- 

 place Mcintosh. You all know the reasons--McIntosh tends to mature 

 all at once at harvest, it is subject to severe pre-harvest drop, 

 the fruit condition is poor after mid-winter, and even scab control 

 is a problem. 



Times have changed and now it has been some time since anyone 

 suggested the need of a new variety to replace part of our Mcintosh 



