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229597

Assessment the Resistance Levels in Field Strain of Cotton Leafworm to some Insecticides

Article

Last updated: 01 Jan 2025

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Subjects

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Tags

Plant pest management

Abstract

This study was performed to assess the resistance levels in a cotton leafworm (CLW), Spodoptera littoralis (Boisd) field strain in comparison with a laboratory strain toward alpha-cypermethrin, chlorpyrifos, methoxfenozide, chlorantraniliprole, and chlorfluazuron. Their Ovicidal activity and residual toxicity against neonates were also evaluated. Glutathione S-transferases (GST) and total esterases activities of of 2nd and 4th larval instars treated with these insecticides were determined. The field strain exhibited different level of resistance where cypermethrin, chlorpyrifos, and methoxfenozide ratios (RR) were 12.7, 48.0, and 13.8, respectively for 2nd instar, while 4th instar is only resistant to cypermethrin, chlorpyrifos with RR of 120.8 and 19.0 compared to lab strain. Concerning the ovicidal and residual toxicity at the recommended field rate, cypermethrin, chlorpyrifos, chlorantraniliprole, and chlorfluazuron achieved mortality of treated eggs and neonates of lab strain 95.3, 98.9, 93.3, and 96.8%, respectively as well as 75.6, 70.0, 85.2 and 91.6%, respectively against field strain. However, methoxyfenozide showed a non-significant difference between lab and field strains. GST and esterases activities were significantly higher in the field strain compared with that of lab strain. It can be concluded that monitoring of insecticide resistance is a crucial step for the plant protection and resistance management programs.
 

DOI

10.21608/asejaiqjsae.2022.229597

Keywords

Cotton leafworm, insecticide resistance, glutathione S-transferases, total esterases

Authors

First Name

Gihan

Last Name

Ali

MiddleName

Fathy

Affiliation

Pesticides chemistry , Faculty of agriculture , Alexandria University

Email

gihanfathy227@gmail.com

City

Alexandria

Orcid

0000-0003-0511-2688

Volume

43

Article Issue

2

Related Issue

32901

Issue Date

2022-04-01

Receive Date

2022-03-05

Publish Date

2022-04-01

Page Start

179

Page End

185

Print ISSN

1110-0176

Online ISSN

2536-9784

Article File

ASEJAIQJSAE_Volume 43_Issue 2_Pages 179-185.pdf

PDF . 254.9kB

Link

https://asejaiqjsae.journals.ekb.eg/article_229597.html

Detail API

https://asejaiqjsae.journals.ekb.eg/service?article_code=229597

Order

1

Type

Original Article

Type Code

53

Publication Type

Journal

Publication Title

Alexandria Science Exchange Journal

Publication Link

https://asejaiqjsae.journals.ekb.eg/

MainTitle

Assessment the Resistance Levels in Field Strain of Cotton Leafworm to some Insecticides

Details

Type

Article

Created At

22 Jan 2023