Poster (Scientific congresses and symposiums)
Toxicity of several fungicides for orange wheat blossom midge, Sitodiplosis mosellana (Géhin) (Diptera: Cecidomyiidae)
Chavalle, Sandrine; Jansen, Jean-Pierre; San Martin y Gomez, Gilles et al.
201567th International Symposium on Crop Protection
 

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Keywords :
midge; Sitodiplosis mosellana; wheat; fungicides; toxicity
Abstract :
[en] The orange wheat blossom midge, Sitodiplosis mosellana (Géhin) (Diptera: Cecidomyiidae), can cause severe losses in wheat grain yield and quality. This pest is known to be susceptible to many insecticides, but various field observations have suggested that some fungicides could also significantly affect S. mosellana. In order to confirm these field observations, the effect on adult midges of several fungicides commonly applied to wheat crops was investigated in the laboratory and in small plots in the field. In each experiment, the fungicides were compared with a positive (insecticide) and a negative control (water). Four fungicides were assessed in the laboratory, each with five doses based on basis of a tenfold dilution starting at the field-recommended dose. The mortality rate was evaluated after 24 hours and the lethal dose 50% (LD50) was determined for each product. In the field, six fungicides were tested at the recommended dose. The effect of each product was compared on the basis of the number of S. mosellana adults caught alive with an insect vacuum sampler (Vortis®) on the morning after the treatments. Both experiments showed a significant effect of several fungicides tested on S. mosellana adults. Chlorothalonil was not toxic for S. mosellana, but tebuconazole, fluxapyroxad and azoxystrobin all induced significant mortality rates.
Research center :
Centre wallon de Recherches agronomiques
Disciplines :
Agriculture & agronomy
Entomology & pest control
Author, co-author :
Chavalle, Sandrine ;  Centre wallon de Recherches agronomiques - CRA-W > Département Sciences du vivant > Unité Protection des Plantes et Ecotoxicologie
Jansen, Jean-Pierre;  Centre wallon de Recherches agronomiques - CRA-W > Département Sciences du vivant > Unité Protection des Plantes et Ecotoxicologie
San Martin y Gomez, Gilles;  Centre wallon de Recherches agronomiques - CRA-W > Département Sciences du vivant > Unité Protection des Plantes et Ecotoxicologie
De Proft, Michel;  Centre wallon de Recherches agronomiques - CRA-W > Département Sciences du vivant > Unité Protection des Plantes et Ecotoxicologie
Language :
English
Title :
Toxicity of several fungicides for orange wheat blossom midge, Sitodiplosis mosellana (Géhin) (Diptera: Cecidomyiidae)
Publication date :
19 May 2015
Event name :
67th International Symposium on Crop Protection
Event organizer :
Ghent University
Event place :
Ghent, Belgium
Event date :
19 mai 2015
Audience :
International
Funders :
DGA - Région wallonne. Direction générale de l'Agriculture [BE]
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since 15 September 2015

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