The brown planthopper, Nilaparvata lugens (Stål), is a major rice pest in many Asian countries. Virtako™ (Syngenta, Switzerland) is a relatively new mixture insecticide, containing 20% chlorantraniliprole and 20% thiamethoxam, which has low mammalian toxicity and high efficacy against Lepidoptera, Coleoptera, Diptera, Hemiptera and Orthoptera. The effects of this insecticide on life table parameters and wing formation of N. lugens were examined in the laboratory. The results showed that Virtako could significantly reduce the fecundity of N. lugens, demonstrating further activity against this pest in addition to direct toxicity. The fecundity (eggs produced per female) of N. lugens treated with the sublethal rates (LC10 and LC30) of Virtako was 75.6% and 59.4% of the control in macropterous cohorts, and 73.0% and 59.3% in brachypterous cohorts, respectively. The relative fitness values were 0.56 and 0.31 for treatments with the LC10, and 0.53 and 0.32 for treatments with the LC30 in macropterous and brachypterous cohorts, respectively. Treatment with sublethal concentrations of Virtako showed the significant induction of macropterous offspring in both macropterous and brachypterous cohorts, which are important in the control of N. lugens, particularly in the prediction of the population dynamics.
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.