Entomophaga (1996) 41, 141-151

J.C.B. Kabissa, J.G. Yarro, H.Y. Kayumbo and S.A. Juliano (1996)
Functional responses of two chrysopid predators feeding on Helicoverpa armigera (Lep: Noctuidae) and Aphis gossypii (Hom: Aphididae)
Entomophaga 41 (2), 141-151
Abstract: Predation on Helicoverpa armigera (Hubner) eggs and Aphis gossypii (Glover) nymphs by 3rd instar larvae of Mallada desjardinsi (Navas) and Chrysoperla 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 of M. desjardinsi preying on H. armigera. However, with C. congrua, a type III model gave a slightly better fit. For A. gossypii, functional responses of both predators did not differ from type II, with M. desjardinsi showing a significantly lower search rate and shorter handling time than C. congrua. Implications of these findings are discussed.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Steven A. Juliano

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
general biology - morphology - evolution

---

Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Helicoverpa armigera
	Aphis gossypii
Chrysoperla congrua (predator)	Helicoverpa armigera	Cotton (Gossypium)	Tanzania
Chrysoperla congrua (predator)	Aphis gossypii	Cotton (Gossypium)	Tanzania
Mallada desjardinsi (predator)	Helicoverpa armigera
Mallada desjardinsi (predator)	Aphis gossypii