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Olfactory Response of Ladybird Beetle, Coccinella septempunctata L. (Coccinellidae: Coleoptera) towards Aphids and their Host Plants

Olfactory Response of Ladybird Beetle, Coccinella septempunctata L. (Coccinellidae: Coleoptera) towards Aphids and their Host Plants

Azhar Abbas Khan1,*, Arif Muhammad Khan2 and Muhammad Afzal3

1College of Agriculture, Bahauddin Zakariya University, Bahadur Campus Layyah, Pakistan
2Department of Biotechnology, University of Sargodha, Sargodha, Pakistan
3Department of Entomology, Faculty of Agriculture, University of Sargodha, Sargodha, Pakistan

*     Corresponding author: azhar512@gmail.com

ABSTRACT

The seven-spot ladybird beetle Coccinella septempunctata L. is a generalist predator and prefer soft bodied insects. Semiochemicals released by the plants in response to herbivorous attack influences third trophic level and natural enemies use these substances to locate their prey. Twelve-arm olfactory apparatus was used to evaluate the response of C. septempunctata toward aphids and different host plants of aphids. Different horticultural plants and field crops were used singly or in combination with prey as a host. An increased numbers of C. septempunctata was observed when host plants were added with aphids. But was no significant difference in most of the combinations except wheat with aphids (3.8889±0.4554). The fresh leaves of rose, citrus, brassica and wheat (1.2±0.2006, 1.3556±0.1416, 1.5778±0.1829, 2.1444±0.2027, respectively) attracted significantly more numbers of C. septempunctata as compared to control and aphids alone (0.7667±0.1204 and 0.8333±0.1153). With every next hour (3, 6 and 12 h) of observation the movement of C. septempunctata toward target localities was elevated. Finding of the current investigation revealed that wheat, brassica, citrus and rose infested with aphids can be used as host plants for mass rearing and culture maintenance of C. septempunctata.
 

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Pakistan Journal of Zoology

December

Vol. 51, Iss. 6, Pages 1999-2399

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