Lethal and sublethal concentrations spirodiclofen stress may increase the adaptation of Panonychus citri (Acari: Tetranychidae).

IF 1.6 3区 农林科学 Q2 ENTOMOLOGY
Hongyan Wang, Haifeng Wang, Kexin Wen, Tao Xie, Shigan Luo, Jiawei Wu, Bin Xia
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引用次数: 0

Abstract

Panonychus citri is one of the most destructive pests in citrus orchards, exhibiting varying degrees of tolerance to numerous insecticides, such as spirodiclofen. To effectively manage pests, this study explores the response of P. citri to spirodiclofen stress from the perspectives of life history, enzymatic parameters, and reproduction. The effects of two concentrations (LC30 and LC50) of spirodiclofen on the biological parameters of P. citri were evaluated by the life table method. The results showed that the development duration, fecundity, oviposition days, and lifespan were shortened, though the pre-oviposition period of two treatments was prolonged in comparison with the control. A significant decrease was recorded in the net reproductive rate (R0) and the mean generation time (T) for the two treatments. Nevertheless, the intrinsic rate of increase (r) and the rate of increase (λ) were not significantly affected in the LC30 treatment, whereas they declined in the LC50 treatment. The enzyme activity assay resulted in higher activities of catalase (CAT), superoxide dismutase (SOD), peroxidase (POD), and carboxylesterase (CarE), among the treatments than the control. In contrast, the treatments recorded lower cytochromeP450 (CYP450) and Glutathione S-transferase (GST) activities than the control. Furthermore, the study detected that relative mRNA expression of Vitellogenin (Vg) and Vitellogenin receptor (VgR) for two treatments were lower than the control. In summary, two concentrations of spirodiclofen inhibited progeny growth and fecundity of P. citri. Additionally, the results of this study may support further research on tolerance of P. citri in response to spirodiclofen stress.

致死和亚致死浓度螺螨酯胁迫可能会增强柑橘盘尼丝虫(蛔虫科:Tetranychidae)的适应性。
柑橘褐飞虱是柑橘园中最具破坏性的害虫之一,对螺螨酯等多种杀虫剂表现出不同程度的耐受性。为了有效控制害虫,本研究从生活史、酶参数和繁殖等方面探讨了柑橘蓟马对螺螨酯胁迫的反应。研究采用生命表法评估了两种浓度(LC30 和 LC50)螺螨酯对柠条蓟马生物参数的影响。结果表明,与对照组相比,两种处理的发育期、受精率、产卵天数和寿命都缩短了,但产卵前期延长了。两种处理的净生殖率(R0)和平均世代时间(T)都明显下降。不过,LC30 处理的内在增长率(r)和增长率(λ)未受明显影响,而 LC50 处理则有所下降。酶活性测定结果显示,各处理的过氧化氢酶(CAT)、超氧化物歧化酶(SOD)、过氧化物酶(POD)和羧酸酯酶(CarE)的活性均高于对照组。相比之下,各处理的细胞色素 P450(CYP450)和谷胱甘肽 S 转移酶(GST)活性低于对照组。此外,研究还发现,两种处理的岩浆素(Vg)和岩浆素受体(VgR)的相对 mRNA 表达量低于对照组。总之,两种浓度的螺螨酯都能抑制柠檬蝶的后代生长和繁殖力。此外,本研究的结果还有助于进一步研究枸橘对螺螨酯胁迫的耐受性。
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来源期刊
CiteScore
4.00
自引率
0.00%
发文量
160
审稿时长
6-12 weeks
期刊介绍: Established in 1910, the internationally recognised Bulletin of Entomological Research aims to further global knowledge of entomology through the generalisation of research findings rather than providing more entomological exceptions. The Bulletin publishes high quality and original research papers, ''critiques'' and review articles concerning insects or other arthropods of economic importance in agriculture, forestry, stored products, biological control, medicine, animal health and natural resource management. The scope of papers addresses the biology, ecology, behaviour, physiology and systematics of individuals and populations, with a particular emphasis upon the major current and emerging pests of agriculture, horticulture and forestry, and vectors of human and animal diseases. This includes the interactions between species (plants, hosts for parasites, natural enemies and whole communities), novel methodological developments, including molecular biology, in an applied context. The Bulletin does not publish the results of pesticide testing or traditional taxonomic revisions.
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