TY - JOUR T1 - Functional Responses of Hippodamia variegata (Goeze) and Coccinella septempunctata (L.) (Coleoptera: Coccinellidae) on Aphis fabae Scopoli and Acyrthosiphon pisum (Harris) (Hemiptera: Aphididae) TT - Hippodamia variegata (Goeze) ve Coccinella septempunctata (L.) (Coleoptera: Coccinellidae)’nın Aphis fabae Scopoli and Acyrthosiphon pisum (Harris) (Hemiptera: Aphididae) Üzerindeki İşlevsel Tepkisi AU - Kayahan, Betül AU - Karaca, İsmail PY - 2025 DA - June Y2 - 2025 DO - 10.55979/tjse.1591522 JF - Turkish Journal of Science and Engineering JO - TJSE PB - Isparta Uygulamalı Bilimler Üniversitesi WT - DergiPark SN - 2687-6086 SP - 31 EP - 37 VL - 7 IS - 1 LA - en AB - In this study, the functional responses of aphid predators Hippodamia variegata (Goeze) and Coccinella septempunctata L. (Coleoptera: Coccinellidae) were tested. In these experiments, the amount of prey consumed by the predator insects at different aphid densities and the effect of this on the reduction of aphid populations were examined. The larvae (L1, L2, L3, and L4) and adults of the predators were starved for 24 hours. Afterward, the second and third instar larvae of the aphid species Aphis fabae and Acythosiphon pisum were offered as prey in specific numbers (5, 10, 20, 40, 80, and 160). After providing the prey, the predators were allowed to feed for another 24-hour stage, and the amounts of prey consumed were recorded. The results showed that the attack rates (a) of the predator insects increased as their developmental stage progressed, while the handling time (Th) decreased. Based on the data, it was concluded that both predator species, especially in the later stages of their developmental stages, had high prey consumption on A. fabae and A. pisum and could be effective in the control of these pests. KW - Coccinellidae KW - Attack Rate KW - Handling Time KW - Biological Control N2 - Bu çalışmada, yaprak bitleri avcıları Hippodamia variegata (Goeze) ve Coccinella septempunctata L. (Coleoptera: Coccinellidae) türlerinin fonksiyonel yanıtları test edilmiştir. Bu denemelerde, predatör böceklerin, farklı yaprak biti yoğunluklarında tükettikleri av miktarı ve bunun yaprak biti popülasyonunun azaltılmasına etkisi incelenmiştir. Predatörlerin larvaları (L1, L2, L3 ve L4) ve erginleri 24 saat boyunca aç bırakılmıştır. Ardından yaprak bitleri Aphis fabae Scopoli ve Acyrthosiphon pisum Harris türlerinin 2. ve 3. dönem larvaları belirli sayılarda (5, 10, 20, 40, 80 ve 160) av olarak verilmiştir. Av verildikten sonra, 24 saatlik bir süre daha beslenmeleri için beklenmiştir ve tüketilen av miktarları kaydedilmiştir. Bu çalışmalardan, avcı böceklerin avlarına karşı saldırı oranlarının (a) gelişme dönemi ilerledikçe arttığı ve avı işleme sürelerinin (Th) azaldığı tespit edilmiştir. 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