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15206

Effect of some insecticides on the immature stages of the egg parasitoid Trichogramma evanescens West. (Hym., Trichogrammatidae )

Article

Last updated: 22 Jan 2023

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Abstract

The effect of five  insecticides, Profect (w.p.), CAPL- 2,  Lambda-cyhalothrin, Spinosad, and Fenitrothion ( Sumithon)  on the immature stages of the first and the second generations of the egg parasitoid Trichogramma evanescens was studied in laboratory at 25 ± 1 0C, 65± 5% R.H. and 12:12 L:D. The study was carried out on parasitized eggs one, two, four and eight days post parasitism. Results showed that: 1) Longevity of the emerged parasitoid was affected by the tested insecticides. The recorded values of the adult longevity emerged from treated eggs ranged from 12 hrs to 7 days ( for females ) and from 12 hrs to 4 days (for males). Treating eggs with chemical insecticides caused death of the emerged adults within few hours post emergence when the treatment was carried out 4 days post parasitism or one day before adult emergence. 2). The number of host eggs turned to black (the parasitoid larvae developed to pupae) varied according to timing of treatment. 3). Adult emergence rate varied according to the used insecticide, the parasitoid stage and the generation. 4) No parasitoids emerged from parasitized eggs treated with CAPL-2.  5). There was no emergence for the parasitoid treated with Lambda-cyhalothrin, spinosad, and fenitrothion (Sumithon) one, two or four days after parasitism. However, emergence was recorded with very low percentages when the eggs were treated 24 hrs before parasitoid emergence. 6) Female percentage slightly decreased in the adults emerged from paeasitized eggs treated with chemicals.

DOI

10.21608/eajbsa.2010.15206

Keywords

: Insecticides, parasitoid, Trichogramma evanescens

Authors

First Name

Mona

Last Name

Shoeb

MiddleName

A.

Affiliation

Department of Biological Control. Plant protection Institute, Agric. Res. Centre

Email

monaashoeb@hotmail.com

City

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Orcid

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Volume

3

Article Issue

1

Related Issue

3209

Issue Date

2010-06-01

Receive Date

2018-09-29

Publish Date

2010-06-01

Page Start

31

Page End

38

Print ISSN

1687-8809

Online ISSN

2090-0813

Link

https://eajbsa.journals.ekb.eg/article_15206.html

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https://eajbsa.journals.ekb.eg/service?article_code=15206

Order

4

Type

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