Sabbahi, Rachid; Merzouki, Abderrazzak et Guertin, Claude 
ORCID: https://orcid.org/0000-0002-0710-6970
(2009).
Potential effect of Beauveria bassiana (Hypocreales: Clavicipitaceae) on Anthonomus signatus (Coleoptera: Curculionidae) in strawberries
Biocontrol Science and Technology
, vol. 19
, nº 7.
pp. 729-741.
DOI: 10.1080/09583150903100815.
Résumé
The strawberry bud weevil, Anthonomus signatus (Say) (Coleoptera: Curculionidae) is a serious pest of strawberry crops in Canada. The results of previous laboratory screening and bioassay experiments showed that A. signatus adults were susceptible to several isolates of Beauveria bassiana (Balsmo) Vuillemin. Based on these results, the INRS-IP and INRS-CFL isolates were selected for field trails. Using a randomized block design with four replicates, three applications of the INRS-IP and INRS-CFL isolates were applied at a rate of 1 x 10(13) conidia/ha at 7-day intervals. The multiple applications of B. bassiana triggered a significant reduction of A. signatus adult populations in strawberries. Twenty-four days after the first application, a significant difference was observed between the mean numbers of surviving adults in all B. bassiana-treated plots compared to control plots. During the field experiment, the persistence of insecticidal activity and the viability of B. bassiana conidia were also monitored. Results showed the presence of viable and infective conidia on strawberry foliage up to 6 days after each application. Moreover, the multiple applications of B. bassiana at a rate of 1 x 10(13) conidia/ha resulted in a significant reduction of damaged strawberry fruits compared with control plots, where fruit loss was caused by A. signatus feeding and egg laying.
| Type de document: | Article |
|---|---|
| Mots-clés libres: | strawberry clipper weevil; Anthonomus signatus; Beauveria bassiana; persistence of insecticidal activity; viability of conidia; multiple applications; biological control; bud weevil; strawberries |
| Centre: | Centre INRS-Institut Armand Frappier |
| Date de dépôt: | 01 juill. 2024 03:25 |
| Dernière modification: | 01 juill. 2024 03:25 |
| URI: | https://espace.inrs.ca/id/eprint/15144 |
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