sample was measured. 

 Samples were kept for 13 

 days at 70°F, after which the 

 incidences of decay, bitter 

 pit, cork spot, and senescent 

 breakdown were determined. 



Treatment with 



fungicides provided 



significantly better control 

 of both flyspeck and sooty 

 blotch than any of the other 

 treatments (Table 2). 

 Calcium nitrate, calcium 

 chloride, and potassium 

 carbonate, however, all 

 reduced the incidence of 

 these two diseases compared 

 to controls. Treatments did 

 not affect the calcium 

 concentration of ft-uit, nor 

 did they affect the incidences 

 of storage disorders (data 

 not shown). Flesh firmness 

 was altered by treatment, 

 both at harvest and after 

 storage (Table 3); however, 

 the differences were 

 relatively small and were 

 not consistent with 

 previously observed 



responses. 



The results from this 

 study were not outstanding. 

 Still, they open the intriguing 

 possibility that calcium 

 nitrate or calcium chloride 

 might be used in conjunction 

 rates of a fungicide to achieve 

 flyspeck and sooty blotch. 



Table 2. Percent of fruit infected with flyspeck or sooty blotch.* 



Treatment 



Captan 50WP + Benlate 50WP 



CaNOj + Latron B1956 



CaCl2+ Latron B1956+vinegar 



KCO3 + Latron B1956 



CaClj + CaNOj + Latron B1956 



Latron B1956 



Control 



*Means within columns not followed by the same letter are sig- 

 nificantly different at odds of 19 to 1. 



Table 3. Flesh firmness (lbs) at harvest and after storage of Golden 

 Delicious apples.* 



*Means within columns not followed by the same letter are sig- 

 nificantly different at odds of 19 to 1 . 



with relatively low 



acceptable control of 



Our research this 



summer will examine fungicide interactions with 

 these cation salts to determine whether or not 

 fungicide rates may be reduced. 



%!-* vL* *X* •^Ia •Xa 

 #Y* *T» *T* *v* *T* 



18 



Fruit Notes, Spring, 1996 



