caa a22 4500 477073530 CHVBK 20180405111433.0 cr unu---uuuuu 170330e19960601xx s 000 0 eng 10.1007/BF02764242 doi (NATIONALLICENCE)springer-10.1007/BF02764242 Functional responses of two chrysopid predators feeding on Helicoverpa armigera (lep.: noctuidae) and aphis gossypii (hom.: aphididae) [Elektronische Daten] [J. Kabissa, J. Yarro, H. Kayumbo, S. Juliano] Réponses fonctionnelles de deux espèces de chrysopes, prédatrices de Helicoverpa armigera (Lep. Noctuidae) et d'Aphis gossypii (Horn. : Aphididae) Predation onHelicoverpa armigera (Hubner) eggs andAphis gossypii (Glover) nymphs by 3rd instar larvae ofMallada desjardinsi (Navas) andChrysoperla congrua (Walker) was studied under laboratory conditions. Single predators that had been starved for 24 hours were isolated for 1 hour in 9 cm Petri dishes containing prey at densities of 5, 10, 15, 20 and 25 per dish. A type II functional response model gave a satisfactory fit to the data in case ofM. desiardinsi preying onH. armigera. However, with C.congrua, a type III model gave a slightly better fit. ForA. gossypii, functional responses of both predators did not differ from type II, withM. desjardinsi showing a significantly lower search rate and shorter handling time thanC. congrua. Implications of these findings are discussed Lavoisier Abonnements, 1996 Mallada desjardinsi nationallicence Chrysoperla congrua nationallicence cotton nationallicence eastern Tanzania nationallicence fonctional response nationallicence Kabissa J. Ilonga Agricultural Research and Training Institute, P.O. Kilosa, Tanzania aut Yarro J. Department of Zoology and Marine Biology, University of Dar es Salaam, P.O. Box 35064, Dar es Salaam, Tanzania aut Kayumbo H. Department of Zoology and Marine Biology, University of Dar es Salaam, P.O. Box 35064, Dar es Salaam, Tanzania aut Juliano S. Department of Biological Sciences, Illinois State University, Felmley Hall 206 Normal, 61761-6901, Normal-Bloomington, Illinois, USA aut Entomophaga Springer Netherlands 41/2(1996-06-01), 141-151 0013-8959 41:2<141 1996 41 10526 https://doi.org/10.1007/BF02764242 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02764242 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kabissa J. Ilonga Agricultural Research and Training Institute, P.O. Kilosa, Tanzania aut NATIONALLICENCE 700 1- Yarro J. Department of Zoology and Marine Biology, University of Dar es Salaam, P.O. Box 35064, Dar es Salaam, Tanzania aut NATIONALLICENCE 700 1- Kayumbo H. Department of Zoology and Marine Biology, University of Dar es Salaam, P.O. Box 35064, Dar es Salaam, Tanzania aut NATIONALLICENCE 700 1- Juliano S. Department of Biological Sciences, Illinois State University, Felmley Hall 206 Normal, 61761-6901, Normal-Bloomington, Illinois, USA aut NATIONALLICENCE 773 0- Entomophaga Springer Netherlands 41/2(1996-06-01), 141-151 0013-8959 41:2<141 1996 41 10526 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer