This investigation was done to study the effect of spray for two times with
CaCl2 0.5% and 1%, high potassium fertilizer and dipping with 2% CaCl2, in
addition to packaging with polyethylene films on the storability of pear fruits
"Coscia C.V". Th
e results showed the significant superiority of high potassium
fertilizer treatment on the other treatments concerning total and single sugars
after harvesting time, while there weren't significant differences between the
other treatments concerning the remaining indicators. After four months of
storage, the packaging treatments were able to the significantly reduction of
weight loss, in addition to preserving the firmness and total soluble solids in the
comparison with unpackaged ones, the average of weight loss in unpackaged
treatments was 15% and 0.65% in packaging treatments, which led to stop the
storage of unpackaged treatments and continue packaging treatments until 7
months. After 7 months, the results showed that the dipping with 2% CaCl2
revealed the high weight loss, while was the least with high potassium fertilizer
treatment, on the other hand there were no significant differences between
treatments for firmness, total soluble solids and tetra table acidity, while total
and single sugars showed significant differences between treatments. Moreover,
the sensory tests assured the importance of packaging with CaCl2 treatments to
improve storability and quality of pear fruits, which CaCl2 1% packaging
treatment got the highest values for most of sensory tests.
Twenty apple varieties were evaluated in the germ plasm of the Agricultural
Scientific Research Center in Swaida for Morphological traits, bud honological
stages, days after full bloom, storability which were ranged between 2.5 – 8
months, and bes
t susceptibility (e.g. wooly aphid and powdery mildew), all
studied varieties showed low susceptibility to wooly aphid, while Jersy Mac
revealed high susceptibility to powdery mildew compared with the other
varieties. The yield of all varieties was studied, so, they divided into: high yield
varieties such Stark Earliest, Royal Gala and Golden 972; Good yield varieties
"Golden Delicious, Starking Delicious, and Granny Smith etc."; and moderate
yield varieties" Red Spur Delicious and Rome Beauty". Chemical analysis
(Total soluble solids and total sugars) were achieved for all studied apple
varieties. Apple Varieties were divided into five groups depending on Days
After Full Bloom (DAFB). The present investigation indicted the high
quantitative and qualitative traits of studied varieties which candidate for
credence and distribute them in suitable environmental areas in Syria.
The study was conducted at the Horticulture Department, Faculty of
Agriculture, University of Damascus, during the season of 2002 and 2003, in
order to study the effect of dipping apple fruits for the tow apple sorts for 5
minutes with some chemic
al substances, α-Tocopherol (0.25%) and
Prohexadion-Calcium (1%).
The fruits were stored at AlMaze cold storage unit under the normal
storage condition (0-1ºC, 93% R.H.), to find out some effects of these
treatments on some physical, chemical, and physiological changes of treated
and untreated apple fruits, especially: fruit weight, firmness, starch, and
soluble solids content.
Analysis of variance indicated a significant difference in storage ability of
both fruit apple samples in case of dipped fruits in Procalcium solution 1%
compared with control fruits. The tocopherol treated fruits were sometimes
significant.
The results showed a reduction in fruit weight in case of treated sample
during cold storage time. Fruit firmness was significantly better in both
treatments of procalcium 1% and tocopherol 0.25%compared with control,
and reducing physiological disorders during cold storage period.
This investigation was carried out in the fields and laboratories of Pome and
Grapevine Department, GCSAR/Syria, on some apple varieties i.e. Richared,
Mutsu and Tourly Winsap to determine the optimal harvest date and its effect on
storability. Fr
uits were harvested in (16/9, 26/9, 7/10, 17/10 and 30/10) depending
on physical and chemical maturity indicators, and stored with the study of changing
in quality indicators and weight lost monthly. The results showed that the studied
varieties differed in their storability according to harvest date, Richared fruits in
26/9 showed long storage for seven months with weight loss of 4.9%, fruit firmness
6.4 kg/cm2, and 18.7% TSS. While the storability was six months for Mutsu fruits
which harvested in 7/10 with weight loss of 4.4%, and fruit firmness 6.1 kg/cm2,
and finally, Tourly Winsap fruits which were stored for five months in 7 and 17/10
harvest dates with fruit firmness 5.1 kg/cm2. Moreover, the three varieties were able
to storage for three months when harvested in 30/10 with weight loss of 3.3%, 4.4%
and 4.5% in Tourly Winsap, Richared and Mutsu respectively, which considered
as consuming maturity for these varieties. These results indicated to the various
storage periods according to fruits harvest time, and the storability, which assists
in regulating offer and demand, and providing markets with fruits for long period,
however harvesting at optimal time reducing the total weight loss, in addition to
high quality indicators.
