Simultaneous Use of Hippodamia variegata and Aphidoletes aphidimyza on Cotton Aphid, Aphis gossypii

Editorial

Authors

1 Msc student of Department Plant Protection, University of Tehran

2 Associate professor of Department Plant Protection, University of Tehran

3 Assistance Professor of Department of Plant Protection, College of Agriculture, Ferdowsi University of Mashhad)

Abstract

Intraguild predation (IGP) occurs when one predator species consumes another predator species with whom it also competes for shared prey. We studied IGP between different stages of Hippodamia variegata and Aphidoletes aphidimyza in absence and presence of extraguild prey (Aphis gossypii) in Petri dish arena. In the absence of extraguild prey all stages of H. variegata (larva1, 2, 3, 4, female and male) consumed all stages of A. aphidimyza (egg, young larva and old larva). The most consumption of A. aphidimyza was recorded for old larva (48h) which reached to 100%. The minimum IGP recorded in combinations which contained eggs of A.aphidimyza. Interactions between H. variegata and A. aphidimyza in all combinations were asymmetric. In the presence of extraguild prey in density of 30, 60 and 120, There was no difference between observed and expected proportions of aphids eaten by both predators together but when the prey density reached at 240 aphids in each petri, IGP decreased.
 

Keywords

BIOLOGICAL CONTROL OF PESTS AND PLANT DISEASES
Volume 1, Issue 2 - Serial Number 2
Autumn & Winter
February 2015
Pages 87-94

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