Sublethal effects of nitenpyram on life-table parameters and wing formation of Nilaparvata lugens (Stal) (Homoptera: Delphacidae)

The Nilaparvuta lugens (Stal) is a major rice pest in Asia. Nitenpyram is a novel neonicotinoid insecticide developed by Takeda Chemical Industry Co., Ltd. The effects of sublethal concentration (LC30) of this insecticide on life-table parameters and wing formation of N. lugens were studied in the laboratory. The results showed that nitenpyram could reduce the fecundity of N lugens to a great extent and demonstrated further activity against this pest in addition to direct toxicity. The fecundity (eggs per female) of N. lugens treated with a sublethal concentration of nitenpyram was 75.4% of the control in macropterous cohorts, and 69.8% in brachypterous cohorts. A sublethal concentration of nitenpyram showed the significant induction of macropterous adults in both macropterous and brachypterous cohorts, which are important in the control of N lugens, particularly in the prediction of emigrating populations in newly colonized areas.