This research was performed to study the effect of sewage water on
the surface water of the Addelbeh Valley stream, and groundwater
on both sides of the stream in Tartous Cement Factory area.
Water samples were taken from the factory water outlet
and
Addelbeh Valley water to study the content of pollutants. We also
took groundwater samples from selected wells on both sides of the
waterway in the studied area. We repeated that process every two
months for a full hydrological cycle from July 2013 to May 2014.
We found a great increase in content of the industrial drainage
water include oils and heavy metals especially iron, copper and
zinc. For example: iron concentration in sewage water exceeded
150 mg/l in all samples. Besides sewage water and stream water
contained high concentrations of ammonia and nitrite versus low
concentration of nitrate, unlike water wells samples. The study
revealed increased EC and salts concentration markedly in wells
water due to its adjacency to the sea.
Macrolophus caliginosus (Hemiptera: Miridae) is a zoophytophagous predator
widely used in integrated pest management programs in both greenhouse and open-field .
Mass rearing of Macrolophus caliginosus is greatly dependent on Ephestia kuehniella
Z
eller (Lepidoptera: Pyralidae) eggs as food source. Moreover, the addition of this
factitious prey after the inoculative releases of Macrolophus caliginosus under field
conditions is recommended to facilitate establishment of this mirid. However, E.
kuehniella eggs are expensive and availability is limited. One possible strategy to reduce
the amount of E. kuehniella eggs needed is the provision of sugar.This study was
conducted during the period between May and November in 2014 in the labs of the
Lattakia center of rearing bio enemis. In this work, the effect of sucrose as nutritional
supplement on selected life-history traits of M.caligenosus was studied. The addition of
sucrose (100 g/l) ad libitum to a diet of E. kuehniella eggs significantly increased the
progeny of Macrolophus caliginosus and did not affect survival of nymphs nor
developmental time. Moreover, addition of sucrose significantly reduced the number of E.
kuehniella eggs consumed. These results may have practical implications of interest in
mass rearing systems of M.caliginosus and its management in fields and greenhouses as a
part of integrated control programs.
Gypsy moth (Lymantriadispar) is polyphagous insect .Therefore we had conducted
an experiment to determine the influence of the following plant hosts(Malussp, Quercussp
,Prunus. armeniaca, Platanusprientalis, Pinusnigra) onthe growth and development
of
gypsy moth's larvae.
The results showed that duration of larval development was the longest
onPinusnigra(77,1±5,46) days and the shortest on Malussp(37,5±4,96) days,for larval
growth in length and weight larvae had gained the higher length and weight on Malussp in
the order (62±1,9)m.m (2136±9,62) mg. on the other hand the lower length and weight
were on Pinusnigra in the order (38±2,44)m.m (545±7,91) m.g. mortality percent of larvae
was least on Malussp.and highest on Pinusnigra.
Finally, pupae had the best weight with shortest development duration on the
Malussp, while the least weight and longest development duration were on the Pinusnigra.
There were proportional indirect of larval percentage mortality on relation to plant host, it
was highest on lower preference plant.
This research was conducted in order to determine the impact
of raindrops in terms of force of impact and its relation to rain
intensity as well as the relay rain on the amount of soil eroded
and water drifting due to water erosion .
This research was conducted in 2016c, at the Zahid Western
Research Station in Akkar Plain region of Tartous Governorate, the
objective of this research is study the effect of non-conventional
organic waste (compost of garbage, sewage sludge) and
cow
manure on the physical properties of clay soil in the region. Wastes
was added to the soil at a rate of (0 - 10 - 20 – 30) t/ha, in order to
determine the effect of the difference in the quantity added on
physical properties of the soil and peanut productivity.
In this study, 200 Tittigoniids specimens were collected from 32 locations in Syrian
coast during 2012 and 2013 seasons. Morphological and taxonomical aspects of
collected specimens have been studied. Identification keys of families, genera,
and s
pecies were recorded according to the most important taxonomic features.
A total of eighth genera recorded and classified, and these were: Phaneroptera
nana, Phaneroptera sparsa, Acrometopa syriaca, Tylopsis lilifolia, Conocephalus
conocephalus, Conocephalus maculatus, Conocephalus concolor. The species
Isopya savigny was considered the first record in Syria.
This work aimed to study the environmental factors influencing growth stopped of olive
leaf midge Dasineura oleae F. loew (Dipter: Cecidomyiidae) and its host
(Hymenoptera: Platygasteridae) Platygaster demades Walker, such as temperature and
reser
vation period. A series of experiments had been done to end this phenomena of
larvae by changing temperatures from suitable temperature at 20±1 °C accompanied
with different photoperiods 16 L: 8D and relative humidity of 75± 5% during 15, 30,
and 60 days, to low temperature at 7± 1 °C accompanied with complete darkness and
relative humidity of 75± 5% for 15 days. This had been done after 30, 60, 90 and 120
days of growth stopped.
