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Register a new userBreeding and Multiplication of Coccinella septempunctata L. predator by Cross Mating, and Determaination the Most Important Morpho – biological Parameters
تربيـة المفتـرس و إكثـاره (Coccinella septempunctata L (Coccinellidae:Coleoptera بطريقة التزاوج الخلطي و تحديد قيم بعض المؤشرات المورفوبيولوجية المهمة
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Damascus University ورقة بحثية
Publication date
2005
fields
Plant Protecion
and research's language is
العربية
Authors
لؤي حافظ أصلان( باحث )
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Shamra Editor
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ربي مفترس المن أبي العيد ذي السبع نقاط L septempunctata Coccinella و كُوثِر بطريقة التزاوج الخلطي كإحدى الطرائق العالمية المتبعة في مراكز تربية الأعداء الحيوية، للانتقال من السلالة المحليـة الطبيعية إلى السلالة المخبرية. و هي تهدف إلى الاستمرار في إنتاج مجاميع المفتـرس و احتوائهـا دون التأثير في القيم العددية لأهم مؤشراته المورفولوجية كطول الجسم، و البيولوجية كالخـصوبة، و المقـدرة الافتراسية و التكاثر (الإنتاجية) و قابلية الحياة و مدة التطور و النسبة الجنسية.
The ladybird predatos (Coccinella septempunctata L.) was bred by the cross mating method, which is followed in all international bio – control centers, to be transformed from the natural local strain into laborators one, which enable continous production and collection of predator groups without affecting the numerical measurements of the most relevant morphological parameters, such as insect's body length, and the biological traits, such as fertility, predators efficacy multiplication, longivity, metamorphesis duration, and sex ratio.
References used
Arnetr. R. H. 1967. Present and future systematics of the coccinellidae in North America Ann. Rev. Entoml., 60, 162 – 170
Ayal. J. A., Kiger. Jr., Francisco. J., 1987. Modern genetics.University of California, Davis. The Benjamin/ Cummings Publishing company, Inc. Menlo Park, California Reading, Massachusetts: London Amsterdam Don Mills Ontario Sydney. 3 Par. PP.295,365,335
Brun. J., Gambier. J., Guige. L., Ferran. A., Vincent.C. 2000. Effects of imidacloprid on C.Septempunctata (Coleoptera:Coccinellidae) larval biology and locomotory behavior. Eur. J. of Entoml., – Vol. 97 No. 4
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This study was conducted on predator Coccinella septempunctata at laboratory
conditions , under average of temperature 20± 2Cº.
Results confirmed: Average of life cycle time was :27.3±4.1 days ( egg development
time 6.5±0.5 , larvae 13.2±0.5 , pup
a 7.5±0.5 days).Also the study of predation efficiency
showed that the average number of aphids consumed by each of the four instars larvae
were (57.9±10.6 , 63.7±9.4 , 66.5±8.3 , and 348±43.4) respectively. Therefore the fourth
larva instar seemed more predation efficiency, as compared to other three instars ,it
consumed double that the three instars consumed, but adult consumed 121±4.5 number
of aphids in one day.
Cryptolaemus montrouzieri Mulsant and the local predator, Nephus includens
Kirch were reared on the Planococcus citri Risso in Lattakia Insectary for Rearing
Natural Enemies. A comparative study was done applying the most important
biological para
meters (Predation rate, life cycle, longevity, starvation tolerance,
fecundity, sex ratio, adult emergence) for both predators under laboratory
conditions.
Research results proved the overpass of that predation rate of C. montro- uzieri
males and females, was greater than that of males and females of N. includens, by
three folds with significant differences. Similarly the perdition rate of the third
instar, in first predator over passed three times the rate of the second predator,
with significant differences reaching 10.53± 2.41, 30.87±3.76 nymphs (second
nymphal instars)/day. The results proved a significant rise of fecundity index in
females of C. monrtouzieri over that of predator, N. includens by 1.8 times
(50.70±13.63, and 107.3±14.87, respectively), while both predators were equal in
values of other biological parameters with no significant differences (biological
development stages, longevity of males and females, adults emergence and sex
ratio).
This research was carried out during 2014 - 2015 in Scientific Centre for Agricultural
Researches. This research aims to determine the effect of some biological and genetic
indicators on the success of Carob seedlings in nurseries by studying three
kinds of
grafting: Auto-grafting, Homo-grafting and Hetero-grafting. Rootstock aged one year and
resulted by two chosen genetic types, namely, SnobarJablah and Alhafa were used. Scions,
they were taken either from seedlings with age of one year resulted by these two types or
from branches aged one year from the selected two types as well. Grafting was conducted
by using Whip Graft way in spring.
Auto-grafting has indicated the importance and the role of biological and genetic
factors for grafts and their impact on rates of grafting success. Concerning rates of success,
the results have shown that Auto-grafting surpassed Hetero-grafting with a significant
reference for both of two genetic types, regardless if the used scion was young or old.
In addition, Auto-grafting has shown surpass on other kinds of grafting, in terms of
subsequent growth of scions. On the other hand, a variety in biological indicators values
has been noticed between the two genetic studied types. In favour of SnobarJablahtype
againstAlhafaʼs type. However, the differences of values were not significant for the most
of conducted measures.
As for the age of scions, the results have pointed out that values of Hetero-grafting
with young scions surpassed values of Hetero-grafting with old scions in terms of the rate
of grafting success and values of biological studied indicators.
WI٢٢٩١ and Tadmor, two barley lines widely grown in the Mediterranean
region were tested for powdery mildew (Erysiphe graminis f. sp. hordei)
resistance together with the European differential tester set against six powdery
mildew isolates. The si
x cultures of powdery mildew developed from single
colonies were comprised of four powdery mildew isolates originating from Syrian barley lines and two cultures originating from Danish barley lines.
In this research, nine inbreed lines of squash (Cucurbita pepo, L) have been
studied during 2007-2008 seasons. The study contains plant phonological
phases, and the most important morphological and productivity characteristics
related to fruit yie
ld to evaluate the characteristics of every line and identify the
economical lines to use it in the breeding programs. The study showed genetic
variation between the groups for some important economic characteristics as
(the number of fruits per plant, percentage of female flowers, yield per plant,
stem long and number of nodes till the first female flower). The study also
showed that the inbreed lines of squash is a rich source of variation and can be
use in a breeding program to product squash hybrid. The results appeared also
the positive correlation between the productivity and some important economic
characteristics, such as percentage of female flowers (r=0.871**), the number of
fruits per plant (r=0.976**). Whereas negative correlation with the nodes till he
first female flower (r=- 0.494) and internodes long (r=- 0.447). Using cluster
analysis, the inbreed lines were classified into 2 distinct classes A and B, Class
A contained seven inbreed wreathe class B contained Tow inbreed lines.
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