Page 469 - Biosystems Engineering

Exogenous Bior egulators–Fruit Composition & Storability 441

Orchard 1 Orchard 2
27 Dec. 30 Jan. 9 Feb. 30 Jan.
Treatment 2 Feb. 1984 1984 1985 1984 1985
Control 5.1 a 0 59.2 b 77.5 c 76.2 b
(53.0 ab) (43.0 cd) (73.2 bc) (97.6 c) (100.0 a)
SADH 40.8 b 0 24.6 a 4.3 a 46.7 ab
(59.1 b) (21.4 bc) (67.5 b) (67.3 a) (90.2 a)
SADH + CaCl 18.3 ab 0 39.0 a 7.4 a 29.7 a
2
spray (38. a) (1.2 a) (45.7 a) (65.7 a) (77.9 a)
SADH + CaCl 13.5 ab 0 27.4 a 14.5 a 55.2 ab
2
dipp (59.7 b) (4.3 ab) (60.0 b) (80.6 ab) (93.3 a)
CaCl spray 31.2 b 0 69.3 b 59.5 b 50.0 ab
2
(55.6 ab) (56.7 d) (82.1 c) (90.2 bc) (98.9 a)

Orchard 1: Experimental Station Prusy, Orchard 2: Experimental Station Sinołeka.
Data in parentheses were obtained from apples taken out from cold storage and kept for 5
days at room temperature.
Means in columns followed by the same letters do not differ at the 5 percent level of
significance: Duncan’s multiple range t test was used.
TABLE 15.7 Effect of Treatments on Percent of Apples with Core Flush

and calcium chloride. Calcium chloride applied in the form of a spray
showed a much better influence on the reduction of core flush than
when it was used for dipping. When apples were kept for 5 days at
room temperature (18 to 20°C), only samples treated with SADH and
sprayed with calcium chloride differed from apples of other treat-
ments in their susceptibility to core flush.
In other experiments, it was found that SADH, in general, reduced
the number of fruits with core flush. In this respect, calcium chloride
applied alone sometimes showed a similar influence as did SADH
alone, but the number of affected fruits was greater. Then, apples
treated with SADH and calcium chloride suffered less from core flush
than fruits treated with calcium chloride alone.
Calcium chloride showed a pronounced influence on the inci-
dents of other disorders of apples sprayed with SADH. Among them
is a reduced occurrence of bitter pit, which is a confirmation of earlier
63
reports. Disorders such as bitter pit, internal breakdown, rotting,
and shriveling of apples rarely occurred in our experiments and was
of minor importance in comparison with core flush.
In most cases, SADH reduced superficial scald occurring on
apples treated with calcium chloride. This disorder appeared more
frequently on apples sprayed with calcium chloride than on apples
treated with SADH alone.