Qingge Wang, Mengchao Xu, Eric An, Xin Zhang, Xiang Li, Jizhen Wei, Xiaoguang Liu
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引用次数: 0
Abstract
The fall armyworm (FAW, Spodoptera frugiperda J. E. Smith), is a highly invasive pest causing significant crop yield losses. Chlorfenapyr has been widely utilized in China to control FAW. This study investigated the sublethal and transgenerational effects of chlorfenapyr on FAW to enhance its appropriate utilization. LC10 and LC20 values of chlorfenapyr were estimated to 7.47 and 12.08 μg/g after a 72-hour exposure, respectively. Low chlorfenapyr concentrations extended the duration of larval stage and pre-oviposition period, reducing larvae body weight, pupation rate and eclosion rate in both the F0 and F1 generations. Additionally, such exposure decreased the F0 generation’s mating rate, fecundity, and egg hatching rate. The feeding indicators in third instar larvae from the F0 generation, including relative growth rate (RGR), efficiency of conversion of ingested food (ECI), efficiency of conversion of digested food (ECD), and relative consumption rate (RCR), exhibited significant decrease compared to the control group, while approximate digestibility (AD) was higher. Larvae exposed to LC10 or LC20 exhibited elevated carboxylesterases (CarEs), cytochrome P-450s (P450s), and glutathione S-transferases (GSTs) activities from 12 to 24 hours’ exposure, Notably, GSTs activity was higher at 6-hours compared to the control group, while CarEs and P450s activities significantly decreased. LC20 adversely affected long-term life table parameters of the F1 generation, including intrinsic rate of increase (r), the finite rate of increase (λ), and the net reproductive rate (R0 ). These findings demonstrate that sublethal effects of chlorfenapyr can impair FAW growth and development, impacting the population dynamics of the F1 generation.
期刊介绍：
Its scope covers all aspects of basic and applied research dealing with insects and more broadly with arthropods inhabiting wild, agricultural and/or urban habitats. The journal also considers research integrating various disciplines and issues within the broad field of entomology and ecology.
Entomologia Generalis publishes high quality research articles on advances in knowledge on the ecology and biology of arthropods, as well as on their importance for key ecosystems services, e.g. as biological control and pollination. The journal devotes special attention to contributions providing significant advances (i) on the fundamental knowledge and on sustainable control strategies of arthropod pests (including of stored products) and vectors of diseases, (ii) on the biology and ecology of beneficial arthropods, (iii) on the spread and impact of invasive pests, and (iv) on potential side effects of pest management methods.
Entomologia Generalis welcomes review articles on significant developments in the field of entomology. These are usually invited by the editorial board, but proposals may be sent to the Editor-in-Chief for preliminary assessment by the editorial board before formal submission to the journal. The journal also considers comments on papers published in Entomologia Generalis, as well as short notes on topics that are of broader interest.
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