Orientation mechanisms and sensory organs involved in host location in a dipteran parasitoid larva
The robber fly Mallophora ruficauda is one of the principal pests of apiculture in the Pampas region of Argentina. Larvae are solitary ectoparasitoids of third-instar scarab beetle larvae. Females of M. ruficauda do not lay eggs on or near the hosts, but on tall grasses. After hatching, larvae are d...
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2011
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00221910_v57_n1_p191_Crespo http://hdl.handle.net/20.500.12110/paper_00221910_v57_n1_p191_Crespo |
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paper:paper_00221910_v57_n1_p191_Crespo2023-06-08T14:47:14Z Orientation mechanisms and sensory organs involved in host location in a dipteran parasitoid larva Crespo, José E. Lazzari, Claudio Ricardo Castelo, Marcela Karina Asilidae Host orientation Klinotaxis Mallophora ruficauda ablation apiculture aromatic hydrocarbon beetle chemical cue ectoparasite fly functional morphology grass hatching host location larva pest species sensory system animal article beetle female fly growth, development and aging histology host parasite interaction larva parasitology physiology sense organ Animals Beetles Diptera Female Host-Parasite Interactions Larva Sense Organs Argentina Pampas Asilidae Cyclocephala Diptera Mallophora ruficauda Poaceae Scarabaeidae The robber fly Mallophora ruficauda is one of the principal pests of apiculture in the Pampas region of Argentina. Larvae are solitary ectoparasitoids of third-instar scarab beetle larvae. Females of M. ruficauda do not lay eggs on or near the hosts, but on tall grasses. After hatching, larvae are dispersed by the wind and drop to the ground, where they dig and search for potential hosts. It is known that second-instar larvae of M. ruficauda exhibit active host-searching behaviour towards their preferred hosts, i.e., third-instar larvae of Cyclocephala signaticollis. Although host-location seems to be mediated by chemical cues, the mechanism of orientation and the sensory organs involved in host location remain unknown. We carried out behavioural experiments in the laboratory to address these questions. We also tested whether the orientation behaviour is exclusively based on the use of chemical cues. We found that larvae of M. ruficauda detect the chemicals with chemosensilla on the maxillary palps. Only one maxillary palp suffices for orientation, but their bilateral ablation abolishes orientation. Besides, an hexane extract of the host body was as attractive as a live host. Our results support that M. ruficauda larvae find their hosts underground by means of chemoklinotaxis. © 2010 Elsevier Ltd. Fil:Crespo, J.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Lazzari, C.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Castelo, M.K. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2011 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00221910_v57_n1_p191_Crespo http://hdl.handle.net/20.500.12110/paper_00221910_v57_n1_p191_Crespo |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Asilidae Host orientation Klinotaxis Mallophora ruficauda ablation apiculture aromatic hydrocarbon beetle chemical cue ectoparasite fly functional morphology grass hatching host location larva pest species sensory system animal article beetle female fly growth, development and aging histology host parasite interaction larva parasitology physiology sense organ Animals Beetles Diptera Female Host-Parasite Interactions Larva Sense Organs Argentina Pampas Asilidae Cyclocephala Diptera Mallophora ruficauda Poaceae Scarabaeidae |
| spellingShingle |
Asilidae Host orientation Klinotaxis Mallophora ruficauda ablation apiculture aromatic hydrocarbon beetle chemical cue ectoparasite fly functional morphology grass hatching host location larva pest species sensory system animal article beetle female fly growth, development and aging histology host parasite interaction larva parasitology physiology sense organ Animals Beetles Diptera Female Host-Parasite Interactions Larva Sense Organs Argentina Pampas Asilidae Cyclocephala Diptera Mallophora ruficauda Poaceae Scarabaeidae Crespo, José E. Lazzari, Claudio Ricardo Castelo, Marcela Karina Orientation mechanisms and sensory organs involved in host location in a dipteran parasitoid larva |
| topic_facet |
Asilidae Host orientation Klinotaxis Mallophora ruficauda ablation apiculture aromatic hydrocarbon beetle chemical cue ectoparasite fly functional morphology grass hatching host location larva pest species sensory system animal article beetle female fly growth, development and aging histology host parasite interaction larva parasitology physiology sense organ Animals Beetles Diptera Female Host-Parasite Interactions Larva Sense Organs Argentina Pampas Asilidae Cyclocephala Diptera Mallophora ruficauda Poaceae Scarabaeidae |
| description |
The robber fly Mallophora ruficauda is one of the principal pests of apiculture in the Pampas region of Argentina. Larvae are solitary ectoparasitoids of third-instar scarab beetle larvae. Females of M. ruficauda do not lay eggs on or near the hosts, but on tall grasses. After hatching, larvae are dispersed by the wind and drop to the ground, where they dig and search for potential hosts. It is known that second-instar larvae of M. ruficauda exhibit active host-searching behaviour towards their preferred hosts, i.e., third-instar larvae of Cyclocephala signaticollis. Although host-location seems to be mediated by chemical cues, the mechanism of orientation and the sensory organs involved in host location remain unknown. We carried out behavioural experiments in the laboratory to address these questions. We also tested whether the orientation behaviour is exclusively based on the use of chemical cues. We found that larvae of M. ruficauda detect the chemicals with chemosensilla on the maxillary palps. Only one maxillary palp suffices for orientation, but their bilateral ablation abolishes orientation. Besides, an hexane extract of the host body was as attractive as a live host. Our results support that M. ruficauda larvae find their hosts underground by means of chemoklinotaxis. © 2010 Elsevier Ltd. |
| author |
Crespo, José E. Lazzari, Claudio Ricardo Castelo, Marcela Karina |
| author_facet |
Crespo, José E. Lazzari, Claudio Ricardo Castelo, Marcela Karina |
| author_sort |
Crespo, José E. |
| title |
Orientation mechanisms and sensory organs involved in host location in a dipteran parasitoid larva |
| title_short |
Orientation mechanisms and sensory organs involved in host location in a dipteran parasitoid larva |
| title_full |
Orientation mechanisms and sensory organs involved in host location in a dipteran parasitoid larva |
| title_fullStr |
Orientation mechanisms and sensory organs involved in host location in a dipteran parasitoid larva |
| title_full_unstemmed |
Orientation mechanisms and sensory organs involved in host location in a dipteran parasitoid larva |
| title_sort |
orientation mechanisms and sensory organs involved in host location in a dipteran parasitoid larva |
| publishDate |
2011 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00221910_v57_n1_p191_Crespo http://hdl.handle.net/20.500.12110/paper_00221910_v57_n1_p191_Crespo |
| work_keys_str_mv |
AT crespojosee orientationmechanismsandsensoryorgansinvolvedinhostlocationinadipteranparasitoidlarva AT lazzariclaudioricardo orientationmechanismsandsensoryorgansinvolvedinhostlocationinadipteranparasitoidlarva AT castelomarcelakarina orientationmechanismsandsensoryorgansinvolvedinhostlocationinadipteranparasitoidlarva |
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