Selectivity of Mycoinsecticides and a Pyrethroid To The Egg Parasitoidcleruchoides Noackae (Hymenoptera : Mymaridae)
Morressier, 2017
Online
unknown
Zugriff:
Thaumastocoris peregrinus (Hemiptera: Thaumastocoridae), is an exotic pest of great importance for Eucalyptus plantations. The use of the egg parasitoid Cleruchoides noackae (Hymenoptera: Mymaridae), is the most used control method. However, other techniques are studied, such as use of entomopathogenic fungi and chemical insecticides. The compatibility of chemical and biological control methods favors integrated pest management. The objective was to evaluate the action of mycoinsecticides and insecticides on the parasitoid C. noackae and its parasitism on T. peregrinus eggs. Two bioassays were performed: 1) cage surfaces (IOBC standard) were submitted to the application of Beauveria bassiana (Boveril) and Metarhizium anisopliae (Metarril), both with concentrations of 1 x 108 conidia/g, Bifenthrin (Capture), with a concentration of 400 g/L, and control (water); after drying, 20 adults of the parasitoid were released per replicate (cage). 2) in this bioassay eggs of T. peregrinus were submitted to the same treatments; after drying 10 eggs of T. peregrinus treated by cage, and released a couple of C. noackae by replicate. Parasitism was allowed for 24 hours (T= 25u00b12u00ba C; UR= 70u00b110% and photophase= 12h). The statistical desing was completely randomized with four treatments and five replicates. Mortality, parasitism and viability were evaluated. B. bassiana was selective to parasitism and viability, and slightly harmful to adults of C. noackae; M. anisopliae was innocuous to adults and the viability of offspring, but it reduced parasitism; and bifenthrin was non-selective to C. noackae in all bioassays.
Titel: |
Selectivity of Mycoinsecticides and a Pyrethroid To The Egg Parasitoidcleruchoides Noackae (Hymenoptera : Mymaridae)
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Autor/in / Beteiligte Person: | Zanuncio, José Cola ; Domingues, Maurício M. ; Becch, Luciane K. ; Velozo, Simone G. M. |
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Veröffentlichung: | Morressier, 2017 |
Medientyp: | unknown |
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