أجريت هذه الدراسة لبحث تأثير الإجهاد الجفافي منفرداً أو مع المعاملة بمثبط نمو كيميائي ( الباكلوبترازول) في النمو الخضري لشتول القرنفل البلدي
Carnation is one of the most important crop for cut flowers not only in
Syria but all over the world.
The producers in Syria and in other countries are suffering during the
seasons of hot temperature from dwarfing of the plants and the production
of
small flowers.
The work conducted here was to investigate the effect of high temperature
on flower development and morphology.
A study of effectiveness of methyle bromide (MB) and two of its alternatives were
carried out to evaluate their impact on soil sterilization, the density of nematode
and on the growth and production of carnation crop. The experement was carried
ou
t in two plastic houses of 400m2 in Zabadani region during 1999-2000.The
treatments were as follows; MB(28g/m2), metam sodium (75cm3/m2), soil steaming
and control. The results showed significant-differences between the control and the
treatments, where the effectiveness of reducing the density of nematodes were
55.6%, 53.4%, 69.9% and 0% respectively. The soil steaming treatment encouraged
the plant vigour and harvest started earlier, but the average number of carnation
flowers for the different treatments were 28.3, 23.9, 32.8 and 23.8 (flowers during
each harvest day) respectively. Confirmed differences were found for yield, where
the highest number of carnation flowers were found in the plots treated with metam
sodium, and therefor we recommend using metam sodium as a part of integrated
pest management program of nematodes in carnation cultivatar.
This study was conducted in the scientific apiary research in Agriculture
Faculty, Damascus University, it was applied on Syrian honeybee colonies, to
determine Euggenia caryophyllu and Majorana hortensis efficiency in
controlling Varroa jacobsoni
Oud., the treatments were varied, from spraying
bees with plant extracts, to smoke them by the smoker and feeding on the
extracts. These substances showed good efficiency to prevent Varroa jacobsoni
development in experimental colonies during three years until now, Majorana
hortensis gave a 71.88 % effect when sprayed and Euggenia caryophyllu gave a
62.49 % effect when sprayed too, when we used them only for one application.
