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Register a new userA study of some important biological parameters of Coccinella septempunctata L (Coleoptera : Coccinellidae) and its predation efficiency against Aphis fabae(Homoptera :Aphididae)
دراسة بعض المؤشرات البيولوجية للمفترس أبو العيد ذو السبع نقاط Coccinella septempunctata L (Coleoptera : Coccinellidae) و تقدير كفاءته الإفتراسية على مَنّ الفول Aphis fabae (Homoptera : Aphididae)
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Tishreen University ورقة بحثية
Publication date
2015
fields
Plant Protecion
and research's language is
العربية
Authors
إسراء أحمد( باحث )
Created by
Shamra Editor
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أجريت دراسة للمفترس Coccinella septempunctata L (Coleoptera :Coccinellidae) ضمن ظروف المختبر, عند متوسط درجة حرارة 20 ±2مْ . أشارت النتائج النهائية : أن مدة تطور المفترس استغرقت بالمتوسط من بداية وضع البيض و حتى انبثاق البالغات 27.3± 1.4 يوماً, للمراحل التالية على التوالي : مدة التطور الجنيني للبيض 6.5±0.5 يوماً , مدة الطور اليرقي 13.2±0.5 يوماً موزعة على الشكل التالي ( 4.2±0.4 يوم للعمر اليرقي الأول - 2.9±0.2 للعمر اليرقي الثاني - 2.9±1.8 يوم للعمر اليرقي الثالث - 3.2±0.4 للعمر اليرقي الرابع), مدة تطور العذراء 7.5 ±0.5 يومًا, و بلغ متوسط عدد أفراد المَنّ المستهلكة خلال مدة تطور الأعمار اليرقية المختلفة موزعة على التوالي: (57.9 ±10.6 - 63.7±9.4 - 66.5±8.3 – 348.7±43.4 حورية و بالغة ) . و نتيجةً لذلك تبَّين أن العمر اليرقي الرابع يستهلك ضعف ماتستهلكه الأعمار الأول و الثاني و الثالث مجتمعة , بينما بلغ معدل الاستهلاك اليومي للبالغات من أفراد الَمّن دون تحديد الجنس 121 ±4.5 , و ذلك خلال تغذيتها لمدة 3 أسابيع على عدد معلوم من أفراد المَنّ.
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 , pupa 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.
References used
FRANCIS, F ., H. ERIC & G.Charles , 2000 , Influence of host plant on specialist \ generalist aphids and the development of Adalia bipunctata (Coccinellidae:Coleoptera) .Eur.J.Entomol.97, 481-485
HESLER .S,F;Ginger.V,c;.,Eric.A,B;S,Leonard.,Danieil.B.M.,and , Parmela .B,B, 2012 , Method for Continuously Rearing Coccinella Lady Beetles (Coleoptera:Coccinellidae).The Open Entomology Journal,6, 42-48
JöRG. E., 1995, Studies on the Aphis fabae group (Homoptera :Aphidae). Zoolgisches Instiut der Freibrug.Sektion Entomologie. Freibrug .Swite-erland.Nr.1086
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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 pro
duction 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.
A study for tribe Coccinellini (Coccinellidae, Coeloptera) was conducted in
south of Syria. The objective of this study was to determine the species and
their relative abundance. Members of this tribe important for biological control
because they
are primariy predators on aphids. The adults Coccinellids were
collected from agriclture and natural ecosystems from August 2001 the end of
July 2003. The results revealed the presence of 10 species belonging to 8 genera.
The investigation included their abundance and distribution in south of Syria.
The species Anisosticta novemdecimpunctata (L.) was recorded in Syria for the
first time. The Adonis ladybird, Hippodamia (Adonia) variegata (Goeze), was
the commonest species. and the most abundant ones were H. variegata (Goeze)
44.9%, Oenopia conglobata (L.) 27.7% and Coccinella septempunctata L.
10.5%.
The functional and numerical response of Aphidoletes aphidimyza feeding on
different densities of third instar nymphs of cotton aphid Aphisg ossypii on cucumber
leaves was studied in laboratory at a temperature (25 ± 2 ° C) and relative humidity of
70
%. The predator consumed 2.8 ± 0.64 nymph/day, when prey density was 5 adults. The
predator consumption increased with increasing prey density. At 60 and 80 preys the
predator consumed 34.2 ± 5.36 and 36.4 ± 5.72 nymph /Day consequintly.
Ther was a very high significant correlation (r = 0.93) between the number of prey
consumed and the density of prey, So according Holling (1959) model of functional
response, we put A. aphidimyza predator under the third type (type III). The increase of
prey density caused increasing in egg numbers of predator The predator laid eggs in few
numbers 19 ± 4.0 eggs / female when fed on 5 prey /day, and these numbers of eggs laid
by predator increased to 28.6 ± 4.48 egg/female under prey density of 10 prey /day. the
increase of eggs numbers reached to 63.4 ± 6.48 egg/female when prey density was 80
prey/day so we noticed the predator oviposition increased with high prey density, and these
increase caused by increase in predation efficiency and these lead to another kind of
response called numerical response.
A survey of the natural enemies of woolly apple aphid Eriosoma lanigerum
(Hausm.) was conducted in unsprayed orchards in the mountain region of
Sweida, Syria. Twenty-six species were found, belonging to Coleoptera,
Dermaptera, Diptera, Heteroptera
, Neuroptera. Coccinella septempunctata L.
was the most abundant predator at the beginning of the season. The coccinellid
Oenopia conglobata (L.) occurred in less numbers and had a secondary
importance. Predatory bugs had a high activity in summer. Also, the aphelinid
parasite, Aphelinus mali (Haldeman), was observed with a high effectiveness at
late summer and at the end of the growing season.
This research was carried out in the " Research and study center of Biological control "- faculty of agriculture, university of Damascus , during 2012-2015 . The aim was to study the predation, developmental time ,
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