Article (Scientific journals)
Comparative emergence phenology of the orange wheat blossom midge, Sitodiplosis mosellana (Géhin) (Diptera: Cecidomyiidae) and its parasitoids (Hymenoptera: Pteromalidae and Platygastridae) under controlled conditions
Chavalle, Sandrine; Buhl, Peter Neerup; Censier, Florence et al.
2015In Crop Protection, 76, p. 114-120
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Keywords :
Hymenopterous parasitoid; Macroglenes penetrans; Euxestonotus error; Platygaster tuberosula; Parasitic wasp emergence; Degree-days
Abstract :
[en] The orange wheat blossom midge, Sitodiplosis mosellana (Géhin) (Diptera: Cecidomyiidae), is a wheat (Triticum aestivum L.) pest that can cause significant yield losses. Several hymenopterous parasitoids are known to attack S. mosellana. For the effective biological control of this pest by its parasitoids, the hostparasitoid synchrony is particularly important. The synchronization between the emergence of S. mosellana and its parasitoids was studied under controlled conditions with soils sampled from two locations. For both sites, three parasitoid species were identified: Macroglenes penetrans (Kirby) (Hymenoptera: Pteromalidae), Euxestonotus error (Fitch) (Hymenoptera: Platygastridae) and Platygaster tuberosula (Kieffer) (Hymenoptera: Platygastridae). The hypothesis that parasitoid emergence is triggered by the same rainfall that induces host emergence was tested by simulating three rainfall events, a week apart. The parasitoid M. penetrans emerged later than S. mosellana with a mean of 57 ± 7 DD (degree-days above 7 °C) for insects collected from Juprelle and 68 ± 10 DD for those from Veurne (i.e., 4-5 days after its host). M. penetrans was therefore closely synchronized with its host through the same inductive rainfall, but this was not the case for E. error or P. tuberosula. Depending on when the rainfall that triggered the emergence of S. mosellana occurred, E. error and P. tuberosula emerged either before or after their host. M. penetrans is a more effective biocontrol agent of S. mosellana compared to P. tuberosula and E. error. Greater knowledge about parasitoid emergence could lead to the better positioning of insecticide treatments against wheat midge that protect and conserve the parasitoid populations.
Research center :
Centre wallon de Recherches agronomiques
Disciplines :
Entomology & pest control
Agriculture & agronomy
Author, co-author :
Chavalle, Sandrine ;  Centre wallon de Recherches agronomiques - CRA-W > Département Sciences du Vivant > Unité Protection des Plantes et Ecotoxicologie
Buhl, Peter Neerup
Censier, Florence ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Phytotechnie des régions tempérées
De Proft, Michel;  Centre wallon de Recherches agronomiques > Département des Sciences du Vivant > Unité Protection des Plantes et Écotoxicologie
Language :
English
Title :
Comparative emergence phenology of the orange wheat blossom midge, Sitodiplosis mosellana (Géhin) (Diptera: Cecidomyiidae) and its parasitoids (Hymenoptera: Pteromalidae and Platygastridae) under controlled conditions
Publication date :
2015
Journal title :
Crop Protection
ISSN :
0261-2194
eISSN :
1873-6904
Publisher :
Elsevier Science
Volume :
76
Pages :
114-120
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 07 September 2015

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