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4928

Comparative Toxicity of Some Pesticides to Tetranychus urticae Koch and two Phytoseiid Mites

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Last updated: 01 Jan 2025

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Abstract

The toxicity of nine insecticides (carbosulfan, chlorepyrifos ethyl, cypermethrin, deltamethrin, deltamethrin + dimethoate, dimethoate,diflubenzuron, and teflubenzuron), and six fungicides (carbendazim, chlorothalonil, difenoconazole, hexaconazole, kresoxim methyl, and penconazole) to two phytoseiid predatory mites: Neoseiulus fallacies German and Typhlodromus cotoneastri Wainstein was evaluated in laboratory, by spraying leaves discs. The toxicity of tested pesticide-residues that showed high toxicity to the predators in spraying method was also evaluated. Results showed that fungicides; carbendazim and kresoxim methyl, were non toxic to the tested predators, hexaconazol and chlorothalinol were slightly toxic; while difenoconazole and pencocanazole were moderately toxic. For insecticides deltamethrin was non toxic to phytoseiid mites, emamectin benzoate and diflubezuron were slightly toxic, cypermethrin and tiflubenzuron were moderately toxic, whereas carbusolfan, dimethoate, chlorepyrifos ethyl, and dimethoate + deltamethrin were highly toxic. As for the toxicity of pesticide-residues, the toxicity of cypermethrin, diflubezuron, and teflubezuron decreased to become slightly toxic when the predators were placed on the leave-discs just after the pesticides were dried out, whereas the toxicity of carbusolfan, chlorepyrifos ethyl and dimethoate did not decrease until 48 hrs passed after application. The toxicity of the insecticide to T. urticae varied, it ranged from non toxic (diflubenzuron) to highly toxic (chlorepyrifos ethyl, cypermethrin, dimethoatee, diltamethrin + dimethoatee, deltamethrin, and emamectin benzoate). The toxicity of tested fungicides to T. urticae was almost the same of their toxicity to phytoseiid mites: it ranged from non-toxic to moderately toxic.

DOI

10.21608/ajesa.2013.4928

Keywords

Apple, Insecticides, fungicides, toxicity, Phytoseiidae, Tetranychus urticae

Authors

First Name

M.

Last Name

Halloum

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Affiliation

Department of Plant Protection, Faculty of Agriculture, Tishreen University, Lattakia, Syria

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Orcid

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First Name

S.

Last Name

Qerhaili

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Affiliation

Lattakia Center for Natural Enemies Rearing, Syria

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Volume

7

Article Issue

1

Related Issue

693

Issue Date

2013-07-01

Receive Date

2018-01-11

Publish Date

2013-07-01

Page Start

57

Page End

61

Print ISSN

1687-4633

Online ISSN

2090-3790

Link

https://ajesa.journals.ekb.eg/article_4928.html

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https://ajesa.journals.ekb.eg/service?article_code=4928

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12

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Original research articles

Type Code

28

Publication Type

Journal

Publication Title

Acarines: Journal of the Egyptian Society of Acarology

Publication Link

https://ajesa.journals.ekb.eg/

MainTitle

Comparative Toxicity of Some Pesticides to Tetranychus urticae Koch and two Phytoseiid Mites

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Article

Created At

22 Jan 2023