Selectivity of alternative products to Telenomus podisi Ashmead (Hymenoptera: Scelionidae)
DOI:
https://doi.org/10.5433/1679-0359.2013v34n6Supl1p3295Keywords:
Euschistus heros, Non-target organisms, Parasitoids.Abstract
The objective of this study was to evaluate the selectivity of alternative products to the egg parasitoid Telenomus podisi (Ashmead) (Hymenoptera: Scelionidae). The products used were Oil Geranium, Natualho®, Pironat®, Rotenat®, Natuneem® and Compostonat at the concentration recommended by manufacturer. Was sprayed 0.2 mL-1 of grout on cards containing 25 eggs of Euschistus heros (Fabricius) (Hemiptera: Pentatomidae) and sterile distilled water as a control. For the free-choice test, a female T. podisi was confined in a glass tube with two cards containing eggs of E. heros one being sprayed with treatment and other with sterile distilled water. . In the no-choice test, a female of T. podisi was confined ina a glass tube containing a card with eggs of E. heros, for a period of 24 h, the card being sprayed with the product prior or subsequent to parasitism. The parasitism percentage, emergence percentage, egg-adult period and sex ratio were evaluated. In free-choice test, the products Compostonat, Natualho® and Geranium Oil reduced significantly the percentage of parasitism. Similar reduction was also observed in no-choice test for Natualho® and Geranium oil in pre and post-parasitism. In pre-parasitism Compostonat and Geranium oil reduced the emergence and egg-adult period was affected by Natualho®. In post- parasitism there was a reduction in the number of eggs with signs of parasitism when the product sprayed was Rotenat®. The sex ratio of emerged adults was reduced by Natualho® and Geranium Oil. Natuneem® was the only product selective to T. podisi in all parameters evaluated.
Downloads
Downloads
Published
How to Cite
Issue
Section
License
Semina: Ciências Agrárias adopts the CC-BY-NC license for its publications, the copyright being held by the author, in cases of republication we recommend that authors indicate first publication in this journal.
This license allows you to copy and redistribute the material in any medium or format, remix, transform and develop the material, as long as it is not for commercial purposes. And due credit must be given to the creator.
The opinions expressed by the authors of the articles are their sole responsibility.
The magazine reserves the right to make normative, orthographic and grammatical changes to the originals in order to maintain the cultured standard of the language and the credibility of the vehicle. However, it will respect the writing style of the authors. Changes, corrections or suggestions of a conceptual nature will be sent to the authors when necessary.
