Effects of imidacloprid on Orius similis: assessing growth, development, and reproduction through age-stage two-sex life table analysis under contact and stomach toxicity treatments

IF 4.3 1区 农林科学 Q1 ENTOMOLOGY
Bo Zhang, Yi-Ru Li, Jin-Long Zhang, Guo-Hua Chen, Nian Yang, Ji-Huan Liu, Guo-Ting Yuan, Xiao-Ming Zhang
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Abstract

Although the use of chemical insecticides to control Frankliniella occidentalis is widespread, it may also affect its dominant predators such as Orius similis. To understand the consequences of imidacloprid on the growth, development, and reproduction of O. similis, we investigated its toxicity and selected the concentrations of LC10 and LC20 for both contact and stomach toxicity tests. Using the age-stage two-sex life table theory, we evaluated the impact of imidacloprid on the life table of the O. similis population. The results showed that the LC10 and LC20 values for each developmental stage of O. similis were lower under contact treatment than those under stomach toxicity treatment. After treatment with imidacloprid, the average oviposition by O. similis decreased compared to the control, and the net reproductive rate, gross reproduction rate, intrinsic rate of increase, and finite rate of increase were also lower than the control. The results also indicated that the peak value of age-stage-specific fecundity of O. similis was delayed by 1–2 days after imidacloprid treatment. Predictions for population growth of O. similis under unrestricted conditions showed that at 60 days, the population size of the control treatment was 2.06 times and 3.20 times that of LC10 contact and stomach toxicity treatment, respectively. For LC20 concentration, the control treatment's population size was 2.75 times and 3.87 times, respectively. Exposure to imidacloprid at different concentrations and treatment with contact and stomach toxicity had adverse effects on the growth and population growth of O. similis. Under imidacloprid stomach toxicity treatment, O. similis showed longer growth time and a slower population growth rate, indicating strong adaptability to the contact environment.

Abstract Image

吡虫啉对黄鹂的影响:在接触毒性和胃毒性处理下,通过年龄阶段双性生命表分析评估生长、发育和繁殖情况
尽管使用化学杀虫剂来控制扁平伯劳鸟的现象非常普遍,但这也可能会影响到扁平伯劳鸟的主要天敌,如雏鸟。为了了解吡虫啉对褐马鸡(O. similis)生长、发育和繁殖的影响,我们研究了吡虫啉的毒性,并选择了LC10和LC20浓度进行接触毒性和胃毒性试验。利用年龄-阶段双性生命表理论,我们评估了吡虫啉对O. similis种群生命表的影响。结果表明,在接触处理下,褐飞虱各发育阶段的LC10和LC20值均低于在胃毒处理下的LC10和LC20值。经吡虫啉处理后,O. similis的平均产卵量与对照组相比有所下降,净繁殖率、总繁殖率、内在增长率和有限增长率也低于对照组。研究结果还表明,吡虫啉处理后,O. similis各龄繁殖率的峰值推迟了1-2天。在不受限制的条件下,对O. similis种群增长的预测表明,60天时,对照处理的种群数量分别是LC10接触处理和胃毒处理的2.06倍和3.20倍。在 LC20 浓度下,对照处理的种群数量分别是其 2.75 倍和 3.87 倍。暴露于不同浓度的吡虫啉以及接触和胃毒处理会对褐马鸡的生长和种群增长产生不利影响。在吡虫啉胃毒处理下,O. similis的生长时间较长,种群增长速度较慢,表明其对接触环境的适应性较强;在吡虫啉胃毒处理下,O. similis的生长时间较长,种群增长速度较慢,表明其对接触环境的适应性较强。
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来源期刊
Journal of Pest Science
Journal of Pest Science 生物-昆虫学
CiteScore
10.40
自引率
8.30%
发文量
114
审稿时长
6-12 weeks
期刊介绍: Journal of Pest Science publishes high-quality papers on all aspects of pest science in agriculture, horticulture (including viticulture), forestry, urban pests, and stored products research, including health and safety issues. Journal of Pest Science reports on advances in control of pests and animal vectors of diseases, the biology, ethology and ecology of pests and their antagonists, and the use of other beneficial organisms in pest control. The journal covers all noxious or damaging groups of animals, including arthropods, nematodes, molluscs, and vertebrates. Journal of Pest Science devotes special attention to emerging and innovative pest control strategies, including the side effects of such approaches on non-target organisms, for example natural enemies and pollinators, and the implementation of these strategies in integrated pest management. Journal of Pest Science also publishes papers on the management of agro- and forest ecosystems where this is relevant to pest control. Papers on important methodological developments relevant for pest control will be considered as well.
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