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Register a new userEffect of Constant Temperature on The Development and Survival of Immature Stages of the Predator Hippodamia variegata (Goeze) (Coleoptera:Coccinellidae)
تأثير درجات الحرارة الثابتة في تطوّر و نسب البقاء للأطوار غير الكاملة للمفترس (Hippodamia variegata (Goeze) (Coleoptera:Coccinellidae
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المجلة السورية للبحوث الزراعية ورقة بحثية
Publication date
2017
fields
Plant Protecion
and research's language is
العربية
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تمّت دراسة تأثير درجات حرارة ثابتة مختلفة (15، 20، 25، 30، 35) °س في مدّة تطوّر المفترس Hippodamia variegata (Goeze) باستخدام منّ الدّراق الأخضر Myzus persicae Sulzer (Homoptera: Aphididae) كفريسة، و التبغ كعائل نباتي. أُجريت الدّراسة في مخبر الحشرات في مركز البحوث العلمية الزراعية في اللاذقية خلال عامي 2015 و 2016. هدفت الدّراسة إلى معرفة تأثير درجة الحرارة في مدّة تطوّر و نسب البقاء للمفترس H. variegata لتحديد درجة الحرارة المناسبة للتربية. تمّ اعتماد 50 مكرراً لكل معاملة (درجة حرارة). أظهرت النتائج أنّ لدرجة الحرارة تأثيراً هاماً في مدّة تطوّر H. variegata فكلما زادت درجة الحرارة، قلّت مدّة التطوّر، و ذلك ضمن المجال الحراري (15-35)°س. كانت أطول مدّة نمو للطور اليرقي 24.84 يوماً على درجة حرارة 15 °س، بينما أقصر مدّة تطوّر على درجة حرارة 35 °س حيث بلغت 4 أيام. كانت مدّة التعذّر أطول على درجة حرارة 15 °س حيث بلغت 9.84 يوماً، بينما أدنى مدّة تعذّر كانت على درجة حرارة 35 °س حيث بلغت يوماً واحداً. كانت أعلى مدّة تطوّر بدءاً من فقس البيض و حتى خروج الحشرة الكاملة 36.84 يوماً و ذلك على درجة حرارة 15 °س، و أدنى مدّة تطوّر 6 أيام على درجة حرارة 35 °س. كما تم حساب نسبة بقاء اليرقات على قيد الحياة حيث بلغت (26%، 52%، 77%، 34%، 4%) على درجات حرارة (15، 20، 25، 30، 35) °س على التوالي. أظهرت نتائج التحليل الإحصائي وجود اختلافات معنوية في المؤشرات البيولوجية المدروسة بين درجات الحرارة المختلفة. و تبين أنّ درجة الحرارة المناسبة لتربية المفترس H. variegata هي 25 °س لأنّ نسبة بقاء اليرقات على قيد الحياة كانت الأعلى 77% عند هذه الدرجة.
The effect of temperature on the development of the predator Hippodamia variegata (Coleoptera:Coccinellidae) reared on the green peach aphid Myzus persicae Sulzer (Homoptera:Aphididae) was determined at five constant temperatures (15, 20, 25, 30 and 35)°C under laboratory conditions. The present study was conducted at Latakia Agricultural Research Center during 2015 and 2016. This study aimed to determine the impact of temperature on the development of the predator H. variegata to identify the suitable temperature for rearing this predator. The duration (days) and survival (%) were measured for this predator. Results showed that temperature had a significant effect on the development of H. variegata immature stages, whereas the development time from larvae to adult decreased with increasing temperature at thermal range (15-35)°C. The longest larval developmental duration was 24.84 days at 15°C, and the shortest duration was 4 days at 35°C. Also, the shortest pupal duration was one day at 35°C and the longest period was 9.84 days at 15°C. The lowest developmental time from eggs hatching to emergence of adults was 6 days at 35°C, while the longest developmental time was 36.84 days at 15°C. Also the ratio of larval survival was affected by temperature, this ratio was (26%, 52%, 77%, 34%, 4%) at (15, 20, 25, 30 and 35)°C respectively. The results of statistical analysis showed that there were significant differences between the five constant temperatures in all studied biological characteristics, and the temperature 25°C was suitable for a successful rearing of the predator H. variegata.
References used
Ali, A.; and P. Qamar Rizvi (2008). Effect of varying temperature on the development and predation of Coccinella transversalis F. (Coleoptera: Coccinellidae) on Lipaphis erysimi (Kaltenbach). Trend in Biosciences. 1 (1; 2): 18-21
Cameron, J.P.; and D.J. Fletcher (2004). Green peach aphid resistance management strategy. Pesticide resistance: Prevention and Management Strategies. 2005. Pp 109-114
Capinera, J.L. (2005). Myzus persicae (Sulzer) (Insecta: Hemiptera: Aphididae) Distribution - Life Cycle and Description - Host Plants - Damage - Natural Enemies. Publication Number: EENY- 222.University of Florida. Pp 9
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