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106020

Histopathological effects of Diflubenzuron and Chromafenozide (IGRs) on egg development in the cotton leafworm Spodoptera littoralis (Boisd) (Lepidoptera, Noctuidae)

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Last updated: 25 Dec 2024

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Abstract

The present study was undertaken to investigate the possible pathogenic impacts of the LC50 of the two insect growth regulators: the chitin synthesis inhibitor, Dimilin® (Diflubenzuron), and the ecdysone agonist, Virtu® (Chromafenozide) on the ovarian tissue of adult female Spodoptera littoralis. Therefore, the LC50 (1.3 & 3 ppm of Dimilin® and 0.1 ppm of Virtu®) were applied to the 2nd and 4th larval instars, respectively. The meroistic polytrophic ovariole of S. littoralis is divided into a terminal filament, a germarium and a vitellarium; the germarium contains the oogonia and the follicular cells that surround the oocytes to form the ovarian follicles in the vitellarium. The ovarian follicles of treated F1 females with Dimilin® exhibited vacuolization, stuffing of follicular sheath, loss of vitellin and degeneration of many cell components of follicular epithelium and oocytes. These obvious signs of damage were increased when using 4th larval instars treatment than the 2nd.Also, damage was pronounced in the ovarioles of the Virtu® treated F1 females. Ovariole growth was stunted and vitellogenesis and chorion formation were inhibited. So, this work shows the high potency and efficacy of the two IGRs on developed ova of S. littoralis

DOI

10.21608/jbaar.2015.106020

Keywords

Dimilin® diflubenzuron, histopathology, Oogenesis, Spodoptera littoralis, Virtu® Chromafenozide

Authors

First Name

K. S.

Last Name

Ahmed

MiddleName

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Affiliation

Biological and Geological Sciences Department, Faculty of Education, Ain Shams University

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Orcid

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First Name

S. M.

Last Name

El-Bermawy

MiddleName

-

Affiliation

Biological and Geological Sciences Department, Faculty of Education, Ain Shams University

Email

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City

-

Orcid

-

First Name

E. H.

Last Name

Ismael

MiddleName

-

Affiliation

Biological and Geological Sciences Department, Faculty of Education, Ain Shams University

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City

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Orcid

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First Name

R. M

Last Name

Abdel-Gawwad

MiddleName

-

Affiliation

Biological and Geological Sciences Department, Faculty of Education, Ain Shams University

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City

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Orcid

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First Name

T. A.

Last Name

Saleh

MiddleName

-

Affiliation

Biological and Geological Sciences Department, Faculty of Education, Ain Shams University

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Orcid

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Volume

1

Article Issue

4

Related Issue

16044

Issue Date

2015-10-01

Receive Date

2015-08-30

Publish Date

2015-10-01

Page Start

147

Page End

153

Print ISSN

2356-9174

Online ISSN

2356-9182

Article File

JBAAR_Volume 1_Issue 4_Pages 147-153.pdf

PDF . 362.1kB

Link

https://jbaar.journals.ekb.eg/article_106020.html

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https://jbaar.journals.ekb.eg/service?article_code=106020

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Original Article

Type Code

1,272

Publication Type

Journal

Publication Title

Journal of Bioscience and Applied Research

Publication Link

https://jbaar.journals.ekb.eg/

MainTitle

Histopathological effects of Diflubenzuron and Chromafenozide (IGRs) on egg development in the cotton leafworm Spodoptera littoralis (Boisd) (Lepidoptera, Noctuidae)

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Article

Created At

22 Jan 2023