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16 © Abu-Zahra and Ateyyat 2016 | Effect of Various Shading Methods
Figure 2: Effect of shading methods on two-
spotted spider mite Tetranychus urticae
Populations, on cucumber leaves planted in
plastic houses. Means with the same letter are
not significantly different using LSD at 0.955
C.L.
Results of Correlations
Results of correlations are summarized in Table
6 and 7. A positive significant correlation was
observed between light intensity with fruit
freshness and dry weight, fruit length and most
cucumber plant vegetative growth parameters.
All of these parameters were improved by in-
creasing light intensity. On the other hand, a
positive correlation was observed between
temperature and blooming date. Blooming date
was accelerated by increases in temperature.
References
Abu-Zahra, T. R. and Ateyyat, M. (2015), “The
Impact of Various Shading Methods on
Cucumber Growth and Production”,
International Journal of Tropical Agriculture,
32 (2): 191-197. (ISSN: 0254-8755)
Bowley, S. R. (1999), A Hitchhiker’s Guide to
Statistics in Plant Biology. A Division of
Plants et al., Inc., Ampersand Printing, 1st
edition, Guelph, Ontario, Canada, NIG
2W1. ISBN: 0-9685500-1-0
Cockshull, K. E., Graves, C. J. and Cave, C. R. J.
(1992), “The influence of shading on yield of
Science Target Inc. www.sciencetarget.com
Also, fruit number was increased by increasing
relative humidity.
4. Conclusions
The results of the present study demonstrate
that the types of the shading treatments used
has an effect on plastic cover permeability. After
washing the cover materials, permeability was
reduced by using GS1 or whitewash as shading
materials. The best results of vegetative growth
and fruit weight were obtained by the GS1
treatment since it produced the highest vege-
tative growth and improved fruit freshness and
dry weight. The highest fruit yield was obtained
by the whitewash treatment. Using the GS1 or
control treatments was found to maintain fruit
quality. The control treatment delayed flow-
ering, decreased the production period and
increased the mite infection percentages. On the
other hand, a positive correlation between tem-
perature, fruit freshness and dry weight was
observed. The results prove that there is a need
for shading plastic houses in Jordan Valley
during summer months.
Acknowledgements
Special thanks to the “Scientific Research Sup-
port Fund” for financing this study, farmer
Mohammad Al-Edwan for holding the work, and
special thanks to Agr. Eng. Wafaa Al-Ghnemat
for doing the field and lab work.
glasshouse tomatoes”, Journal of Horticul-
tural Science, 67: 11-24
El-Aidy, F., El-Zawely, A., Hassan, N. and El-
Sawy, M. (2007), “Effect of Plastic Tunnel
Size on Production of Cucumber in Delta of
Egypt”, Appl. Ecol. Environ. Res., 5 (2): 11-24
El-Gizawy, A. M., Abdalla, M. M. F., Gomaa, H. M.
and Mohammed, S. S. (1992), “Effect of
Different Shading Level on Tomato Plants
Yield and Fruit Quality”, Acta Hort., 323: 349-
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