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24847

Disruptive Impacts of Selected Insecticides on Larval Haemogram parameters of the Red Palm Weevil, Rhynchophorus ferrugineus (Coleoptera: Curculionidae)

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Last updated: 22 Jan 2023

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Abstract

The present study was conducted to investigate the effect of three insecticides,pyriproxyfen (admeral), neemazal (azadirachtin) and spinetoram (Radiant), against the red palm weevil Rhynchophorus ferrugineus. Two sublethal concentrations of each compound had been estimated in a preliminary test: LC50: 1067.5 ppm, LC75: 2317.5 ppm (pyriproxyfen), LC50: 14600 ppm, LC75: 27100 ppm (neemazal), LC50: 18.37 ppm, LC75: 88.60 ppm (spinetoram). These concentrations were tested against the immune cells (Total hemocyte count, Differential hemocyte count and hemocyte deformations).  Depending on the present study, five types of hemocytes were observed as prohemocyte, granulocyte, plasmatocyte, oenocyte and spherulocyte. Total hemocyte count was significantly increased irrespective to the insecticide. All insecticide induced the prohemocyte while the other types were declined. However, the tested insecticide exhibited pathological symptoms on insect haemocytes morphology in the cell membrane, cytoplasm and nucleus.  v

DOI

10.21608/eajbsa.2017.24847

Keywords

Total haemocyte count, Differential haemocyte count, Rhynchophorus ferrugineus, Pyriproxyfen, neemazal, Spinetoram

Authors

First Name

Hamadah

Last Name

Sh.

MiddleName

Kh.

Affiliation

Faculty of Science, Al-Azhar University, Madenit Nasr, Cairo, Egypt

Email

khalid_hamadah@azhar.edu.eg

City

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Orcid

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First Name

Tanani

Last Name

A.

MiddleName

M.

Affiliation

Faculty of Science, Al-Azhar University, Madenit Nasr, Cairo, Egypt

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City

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Orcid

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Volume

10

Article Issue

8

Related Issue

2197

Issue Date

2017-12-01

Receive Date

2019-01-16

Publish Date

2017-12-01

Page Start

85

Page End

97

Print ISSN

1687-8809

Online ISSN

2090-0813

Article File

EAJBSA_Volume 10_Issue 8_Pages 85-97.pdf

PDF . 555.7kB

Link

https://eajbsa.journals.ekb.eg/article_24847.html

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https://eajbsa.journals.ekb.eg/service?article_code=24847

Order

9

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Original Article

Type Code

667

Publication Type

Journal

Publication Title

Egyptian Academic Journal of Biological Sciences. A, Entomology

Publication Link

https://eajbsa.journals.ekb.eg/

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Article

Created At

22 Jan 2023