The cockroach, Blatta orientalis, is among one of the important domestic pests found in the semi-arid areas of Algeria. In this study, the insecticidal activity of spinosad, bioinsecticide, was tested against B. orientalis using different concentrations. Bioassays were done by topical application on newly emerged adult females under laboratory conditions. The results showed that the product exhibits a high level of toxicity with a dose-response relationship. The enzymatic analyses of the treated adults of B. orientalis with the determined LC50 dose revealed a neurotoxic activity of spinosad, with an inhibition of acetylcholinesterase and a stimulation of the detoxification system that is interpreted by the increase of glutathione-S-transferase activity. In other experiments the compound was applied at LC50 on a newly emerged females and its effect was investigated on reproduction during the first gonadotrophic cycle (0, 2, 4 and 6 days) and the ovarian protein contents. The results showed that spinosad reduced the number of oocytes per paired ovaries, the size of basal oocytes and the ovarian protein contents.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 23 • No. 2