Effect of chlorfluazuron and flufenoxuron on development and reproductive performance of the black cutworm,<i>Agrotis ipsilon</i>(Hufnagel) (Lepidoptera: Noctuidae)

Shaurub, El‐Sayed H.; Zohdy, Nawal Zohdy M.; Abdel-Aal, Aziza E.; Emara, S. A.

doi:10.1080/07924259.2017.1384407

Cited by 21 publications

(25 citation statements)

References 37 publications

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“…66 the fifth day of female pupation, then reached a peak in 48 or 36 h old female adults and decreased quickly, which was similar to our results. Apart from the Vg content, Shaurub et al 55 and Wang et al 56 also found that chitin synthesis inhibitors (chlorfluazuron, flufenoxuron and buprofezin) could interfere with vitellogenesis or reduced oviposition. So chitin synthase was also involved in the ovaryʼs development 57 and eventually led to resurgence accompanied by resistance to bistrifluron.…”

Section: Discussionmentioning

confidence: 99%

The fitness advantages of bistrifluron resistance related to chitin synthase A in Spodoptera litura (Fab.) (Noctuidae: Lepidoptera)

Gong

Wang

Huang

et al. 2021

Pest Management Science

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BACKGROUND: Spodoptera litura is one of the major agricultural pests in China, and it has developed serious resistance to many traditional chemical insecticides. In the present study, the bistrifluron-resistant (Bis-SEL) strain accompanied by a higher oviposition, 113.8-fold RR compared to the bistrifluron-susceptible (Bis-UNSEL) strain, was obtained by bidirectional screening. A comparison of their gonad coefficiency and genes related to oviposition or resistance was used to elucidate the resurgence mechanism.RESULTS: The ovarian index, oviposition, and potential egg production in the Bis-SEL strain of female adults were significantly higher than those in the Bis-UNSEL strain, and the length of ovariole in the Bis-SEL strain was also significantly elongated. The protein contents of vitellogenin (Vg) and vitellogenin receptor (VgR) in the Bis-UNSEL strain were lower than those in the Bis-SEL strain, consistent with their gene expressions levels, and there was a significantly positive linear correlation between Vg and VgR protein contents, further confirming that resistant strains have high reproductive fitness. Moreover, the chitin synthase A in the Bis-SEL strain was clearly up-regulated, and a mutation (H866Y) near the QRRRW in the catalytic domain caused a rise in the hydrogen bond between UDP-GlcNAc and chitin synthase, and its chitin content was higher than that in the Bis-UNSEL strain. Nevertheless, the sensitivity of the Bis-SEL strain to bistrifluron was significantly recovered when it was knocked down though RNA interference. CONCLUSION:The fitness advantages of bistrifluron resistance may be related to the up-regulation and mution of chitin synthase A.

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Section: Discussionmentioning

confidence: 99%

The fitness advantages of bistrifluron resistance related to chitin synthase A in Spodoptera litura (Fab.) (Noctuidae: Lepidoptera)

Gong

Wang

Huang

et al. 2021

Pest Management Science

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“…Each treatment was replicated five times. Each cup of the control sample was supplied by known weighed disks of fresh castor leaves, treated with the sub-lethal concentration of each treatment, according to Shaurub et al [23]. All the larvae, food supplied, food unconsumed, and larvae feces were weighed daily before and after feeding until the pupation was done.…”

Section: Anti-nutritional Activities Of the Tested Bos Against A Ipsilon Larvaementioning

confidence: 99%

Nutritional Responses of the Black Cutworm, Agrotis ipsilon (Hufn.), Larvae under Toxicity Effects of Five Wild Botanical Extracts from Sinai, Egypt

Nasr

Teleb

Abousaty

2021

ARRB

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Aims: To identify the chemical components of five wild Botanical oils (BOs) and their larvicidal influences on the anti-nutritional indices of the 4th instar larvae of Agrotis ipsilon. Study Design: A comparative study with the randomized design, using five plant Extracts replicated five times. Place and Duration of Study: Mentha longifolia, Artemisia judaica, Majorana hortensis, Origanum syriacum, and Achillea santolina were collected from the Sinai desert, Egypt. Study procedures were done at the Laboratory of Botany and Zoology, Faculty of Science, Zagazig University, Egypt, between December 2018 and June 2020. Methodology: An analysis of the tested BOs components was done using a Shimadzu GC-9A gas chromatograph. Five sub-lethal concentrations of each plant were prepared (5 replicate/treatment) to evaluate medium lethality against A. ipsilon larvae (20 larvae/replicate). Untreated larvae were used distilled water only as a control. Ten larvae of each treatment were treated with only one LC50 to estimate the effect of different tested BOs on anti-nutritional Activities. Results: The main component of the M. longifolia and A. judaica oil was Piperitone at 39.79 and 37.55%, respectively; whereas the M. hortensis, O. syriacum, and A. santolina oil was Terpinen-4-ol, Thymol, and Fragranyl acetate at 29.82, 31.21, and 25.67%, respectively. According to LC50 of the tested BOs, the toxicity of A. judaica, M. longifolia, O. syriacum, respectively, were the most effective oils, while M. hortensis and A. santolina oils were the least susceptibilities. The more toxic oils reduced food consumption, causing a significant decrease in relative consumption rate (RCR), growth rate (RGR), and efficiency of conversion of ingested food (ECI)/digested (ECD). The previous oils also showed a significant increase in metabolic cost (MC) and anti-feeding activities against A. ipsilon larvae compared to M. hortensis and A. santolina. Conclusion: It is suggested that A. judaica and M. longifolia extracts contain high Piperitone content and could be accepted as toxicants to control A. ipsilon.

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“…They are safely biodegradable compounds [9] with minimum effect on natural enemies and their effect is specific to target pests [10] . This may explain their classification as biorational insecticides [11] . Usage of CSIs deteriorates reproduction and development of adult insects [12,13] .…”

Section: Introductionmentioning

confidence: 98%

“…Moreover, it causes the formation of abnormal new cuticles and death of the insects [13,20] . Chlorfluazuron (5%), also an insect growth regulator of the BPUs group, is used to control chewing pests and affects various insect pests, especially lepidopteran larvae [11] . The present study evaluates the toxic effect of LF and CF on C. albiceps L3 mortality, larval deformations, pupation percent, and adult emergence.…”

Section: Introductionmentioning

confidence: 99%

Toxicological and ultrastructural effects of chitin synthesis inhibitors (lufenuron and chlorfluazuron) on third larval instars integument of Chrysomya albiceps (Diptera: Calliphoridae)

Khater

2021

Parasitologists United Journal

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Background: Chrysomya albiceps is of medical and veterinary importance as larvae cause cutaneous myiasis in both man and animals. Chitin synthesis inhibitors (CSI) are commonly used in control of dipterous flies causing myiasis. Several compounds are utilized to interfere with chitin deposition and molting processes during development. Objectives: In comparison to chlorfluazuron (CF), the current study aims to investigate the toxicological and ultrastructural effects of the CSI, lufenuron (LF) on the biological parameters of the third larval instar (L3) of C. albiceps. Material and Methods: Early L3 of C. albiceps were fed on diets mixed with four concentrations of LF and CF. Average larval mortality rates were subjected to probit model analysis for calculating LC 25 , LC 50 , and LC 90 . Larval deformation and mortality, percent pupation, adult emergence and chitinase enzyme activity were recorded. Using transmission electron microscope (TEM), ultrastructural study was carried out on non-treated and treated L3 to evaluate LF effects on the integument and muscle layer. Results: By recording LC 50 values for LF and CF (146 and 194 ppm, respectively), LF showed more toxic effects on L3 than CF, and at a lower concentration. Reduction in pupation percentage, complete cessation of adult emergence from pupae and decrease in chitinase activity were observed after treatment with all concentrations of both compounds. Ultrastructural changes after treatment with LC 50 of LF indicated tegumental, nuclear and mitochondrial toxicological effects, and muscle fibers disorganization. Conclusion: LF proved to be a successful CSI in controlling myiasis causing C. albiceps L3.

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Effect of chlorfluazuron and flufenoxuron on development and reproductive performance of the black cutworm,Agrotis ipsilon(Hufnagel) (Lepidoptera: Noctuidae)

Cited by 21 publications

References 37 publications

The fitness advantages of bistrifluron resistance related to chitin synthase A in Spodoptera litura (Fab.) (Noctuidae: Lepidoptera)

The fitness advantages of bistrifluron resistance related to chitin synthase A in Spodoptera litura (Fab.) (Noctuidae: Lepidoptera)

Nutritional Responses of the Black Cutworm, Agrotis ipsilon (Hufn.), Larvae under Toxicity Effects of Five Wild Botanical Extracts from Sinai, Egypt

Toxicological and ultrastructural effects of chitin synthesis inhibitors (lufenuron and chlorfluazuron) on third larval instars integument of Chrysomya albiceps (Diptera: Calliphoridae)

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