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Biological and chemical characterization of a kairomone excreted by the bean aphids, Aphis fabae Scop. (Hom., Aphididae), and its effect on the predator Metasyrphus corollae Fabr. II‐ Behavioural response of the predator M. corollae to the aphid kairomone
Author(s) -
Shonouda M. L.,
Bombosch S.,
Shalaby A. M.,
Osman S. I.
Publication year - 1998
Publication title -
journal of applied entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.795
H-Index - 60
eISSN - 1439-0418
pISSN - 0931-2048
DOI - 10.1111/j.1439-0418.1998.tb01455.x
Subject(s) - aphididae , kairomone , biology , aphid , predator , aphis , pest analysis , horticulture , botany , homoptera , predation , toxicology , ecology
The present study shows the importance of aphid‐kairomone as an additional stimulus which arrests and increases the occurrence of the predator M. corollae with the treated plants. This increase in occurrence could assist in the control of the aphid‐pest when applied in the target area. The results are summarized as follows. (1) The first concentration of aphid‐extract (AEC,) stimulated the oviposition of syrphid females much more than the second concentration of hexacosane (C 26 C II ) and the addition of hexacosane to the aphid‐extract did not increase its activity. (2) The experienced syrphid females deposited more eggs with C 26 C II , AEC 1 and with a mixture of both than did the inexperienced females. (3) The aphid‐extract (AEC 1 ) and hexacosane (C 26 C II ) affected the searching behaviour of syrphid females by significantly increasing the path length and the number of turns exhibited. (4) The syrphid females were significantly arrested by plants treated with either C 26 C II or AEC 1 . (5) The results confirm that the predator syrphid females have used hexacosane and aphid‐extract as a source of kairomone.