Determination of the preferred two different coccinellid species on different aphid species feeding on broad bean plants

Betül Kayahan,İsmail Karaca,Ali Kayahan

doi:10.31015/jaefs.2021.2.5

Abstract

In this study, the orientation of two different predator species [(Coccinella septempunctata L., Hippodamia variegata (Goeze) (Coleoptera: Coccinellidae)) to two different aphids [Aphis fabae Scopoli and Acyrthosiphon pisum Harris (Hemiptera: Aphididae)] was investigated. Y-type olfactometer which was made of glass material with one entrance and two exit openings was used in the study. Different applications were applied to the exit ends of the olfactometer and the orientation of the predators dropped from the entrance end was examined. Individuals passing the marked area (10 cm) on the olfactometer were considered to have turned to that plant. All of the trials were conducted separately for each predator and prey with 10 replications. The counts of the insects advancing on the arms of the olfactometer were made 1, 4 and 8 hours after the release. When looking at the data obtained in the first stage of the study, it was determined that the predator insects mostly gravitate towards the leaves infected with aphids; In the second stage, it was observed that C. septempunctata individuals mostly turned towards the side that was contaminated with A. pisum, and H. variegata individuals mostly turned towards the side that was contaminated with A.fabae. When looking at the data obtained from the study, it was determined that the plants damaged by herbivorous insects show an attractive feature for predators. Accordingly, it was concluded that chemicals obtained from broad bean plants damaged by aphids should be analyzed.

Highlights

Living organisms are in constant interaction with each other and with the inanimate environment in which they live (Odum and Barrett, 2005)
In the second stage of the experiments, the plant contaminated with A. fabae was placed on one end of the olfactometer and the plant infected with A. pisum on the other end, and the movements of the predator individuals released from the entrance end were observed as in the first stage
In the first stage of the experiment in which the orientation of Coccinella septempunctata was examined (1 arm of clean plant and the other plant infected with aphids), it was determined that the predator insect mostly turned towards the arm where the infected plants were found (p

Summary

Introduction

Living organisms are in constant interaction with each other and with the inanimate environment in which they live (Odum and Barrett, 2005). In this context, arthropods, like all living things, are under the influence of chemicals secreted by the plants in their environment. Arthropods, like all living things, are under the influence of chemicals secreted by the plants in their environment Both herbivores and their natural enemies benefit from these chemicals in finding their food (Bell and Cardé, 1984; Visser, 1986; Roitberg and Isman, 1992; Vet and Dicke, 1992; Cardé and Bell, 1995; Schoonhoven et al, 1998). In order to achieve positive results in the control of harmful organisms in agriculture, the host and foraging behaviors of the factors used in biological control should be known (Tunca et al, 2011)

Methods

Results

Conclusion