Abstract
A current study was established in laboratories of Biological Control Department, Shandaweel Research Station, Agricultural Research Center. Herbivore induced plant volatiles may be attractive to one or more specific natural enemies. Releasing of volatiles from certain pests and host injured plants has a role in host or prey location. Response of newly emerged and starved or fed adults (for three days) for each of Coccinella undecimpunctata (Coleoptera: Coccinellidae) and its parasitoid adults, Tetrastichus coccinellae Kurd. (Hymenoptera: Eulophidae) to volatile sources were studied. Olfactory orientation was emitted from a combination of host plant and host insect that volatiles from four sources (e.g. infested sorghum plants with aphids (corn leaf aphid (Rhopalosiphum maidis (Fitch) (Hemiptera: Aphididae)), crushed un-infested sorghum leaves and infested sorghum leaves plus the last larvae and newly pupated coccinellid). Results demonstrated the complexity of the use of different volatile info-chemicals generated by the different environmental stimuli. Reactions of the used C. undecimpunctata adults and its parasitoids were noticed and different strategies to exploit these signals were evolved.
Highlights
The influence of corn leaf aphid, Rhopalosiphum maidis (Fitch) (Hemiptera: Aphididae) against induced plantHerbivorous insects are consumed by predatory and volatiles on Coccinella undecimpunctata
R. maidis were used as a prey for C. undecimpunctata in standardized environmental conditions of (26 ± 2oC and 65 ± 10% R.H.)
Undecimpunctata Adults and their Parasitoid Adults to Volatile Info-chemicals Associated with Sorghum Plants and the Aphid Prey: 3.1
Summary
Herbivorous insects are consumed by predatory and volatiles on Coccinella undecimpunctata These entomophagous arthropods Coccinellidae) and its parasitoid, Tetrastichus coccinellae visit plants to find hosts or prey, but they may Kurd. (Hymenoptera: Eulophidae) searching behavior will feed and develop on plants [17]. (Coleoptera: Coccinellidae) and Its. Parasitoid Tetrastichus coccinellae Kurd. (Hymenoptera: Eulophidae) plants with aphids, crushed un-infested sorghum leaves and infested sorghum leaves plus the last larvae and newly pupated coccinellid) in olfactometer were tested. Strategies to exploit signals on newly emerged and starved or fed adults for the studied prey and its parasitoid were evolved
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