Characterization of substrate-borne vibrational communication of Bagrada hilaris
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2 سال پیش
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Characterization of substrate-borne vibrational communication
Characterization of substrate-borne vibrational communication of Bagrada hilaris
A lecture given by Marica Scala at the 3rd Biotremology Conference, Piran Slovenia.
Session: behavior, ecology & morphology, 21 September 2022
Abstract:
Bagrada hilaris (Hemiptera: Pentatomidae) is a main pest of Brassica crops. It is native of the temperate regions of Africa, India, and the Middle East. The mating of adults of B. hilaris was already described in literature as it is characterized by a particular behavioural sequence: male antennation of the female, mounting, and copulation. In other pentatomids, mating involves vibrational signals along with chemical compounds, but there is no mention of the vibrational communication of B. hilaris. The aim of this study was to characterize the substrate-borne vibrational signals involved in the B. hilaris mating behavior. Adult males and females (3-7 days old) of B. hilaris were recorded separately or in pairs (male-female) using two laser doppler vibrometers. For each condition, insects were recorded on two different substrates: a potted bean plant (Phaseolus vulgaris L.) and a loudspeaker membrane. The recordings lasted 15 minutes per replica. We identified three types of vibrational signals with a modulated harmonic frequency structure. Males emitted two signal types, MS1 and MS2 whose dominant frequency (mean ± SD) on plant were respectively 130±18.46 and 142.32±37.32 Hz and on membrane 210.67±278.93 Hz and 159.22±28.47 Hz. Females emitted only one signal type (FS, mean ± SD dominant frequency: on plant: 129.94±35.27 Hz; on membrane: 130±9.95 Hz). Males and females produce calling signals when alone or before contact with the mating partner. After touching the female and during mating, the male emits a series of repeated MS2 (i.e., a train). Thus, it appears that vibrations play a role before and after copula. Additional studies are needed to further understand how vibrations and pheromones interact with each other. As already seen in other stinkbugs, a clear understanding of the intraspecific communication might enable the development of an eco-friendly pest management strategy.
http://projects.nib.si/biotremology2022/
A lecture given by Marica Scala at the 3rd Biotremology Conference, Piran Slovenia.
Session: behavior, ecology & morphology, 21 September 2022
Abstract:
Bagrada hilaris (Hemiptera: Pentatomidae) is a main pest of Brassica crops. It is native of the temperate regions of Africa, India, and the Middle East. The mating of adults of B. hilaris was already described in literature as it is characterized by a particular behavioural sequence: male antennation of the female, mounting, and copulation. In other pentatomids, mating involves vibrational signals along with chemical compounds, but there is no mention of the vibrational communication of B. hilaris. The aim of this study was to characterize the substrate-borne vibrational signals involved in the B. hilaris mating behavior. Adult males and females (3-7 days old) of B. hilaris were recorded separately or in pairs (male-female) using two laser doppler vibrometers. For each condition, insects were recorded on two different substrates: a potted bean plant (Phaseolus vulgaris L.) and a loudspeaker membrane. The recordings lasted 15 minutes per replica. We identified three types of vibrational signals with a modulated harmonic frequency structure. Males emitted two signal types, MS1 and MS2 whose dominant frequency (mean ± SD) on plant were respectively 130±18.46 and 142.32±37.32 Hz and on membrane 210.67±278.93 Hz and 159.22±28.47 Hz. Females emitted only one signal type (FS, mean ± SD dominant frequency: on plant: 129.94±35.27 Hz; on membrane: 130±9.95 Hz). Males and females produce calling signals when alone or before contact with the mating partner. After touching the female and during mating, the male emits a series of repeated MS2 (i.e., a train). Thus, it appears that vibrations play a role before and after copula. Additional studies are needed to further understand how vibrations and pheromones interact with each other. As already seen in other stinkbugs, a clear understanding of the intraspecific communication might enable the development of an eco-friendly pest management strategy.
http://projects.nib.si/biotremology2022/
2 سال پیش
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