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270997

BIOLOGICAL CONTROL OF THE HONEYDEW MOTH, CRYPTOBLABES GNIDIELLA MILL. IN GRAPE ORCHARDS USING THE LOCAL EGG PARASITOID,TRICHOGRAMMA EVANESCENS WEST. AND AGERIN ( BACILLUS THURINGI

Article

Last updated: 01 Jan 2025

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Plant Protection

Abstract

The role of inunudation by the egg parasitoid , Trichogramma evanescens West alone and combined with Agerin (Bacillus thuringiensis ) compared with recommended insecticides(Relidan and Somithion ) was evaluated against the honeydew moth (HDM) Cryptoblabes gnidiella Mill. infesting grape orchards in Mina region during two successive seasons of  (2006 and 2007) .The results obtained showed that the highest general percentage of parasitism on HDM  eggs  was observed in  grape orchard  treated with egg parasitoid and Agerin (B.t.) together followed with those treated with  only egg parasitoid, while it was nil in those treated with insecticides and untreated areas (control). Also spraying insecticides in grape orchard significant reduced the number of predators compared with the other two treatments. Furthermore , the release of the egg parasitoid plus spraying Agerin (B.t.) in  grape orchards  demonstrate the highest general mean percent reduction in infestation by C. gnidiella (67.65 and 68.99 %) followed with 63.39 and 44.56 % reduction in grape orchards treated with insecticides and 59.35 and 44.78 % reduction in those treated  with the egg parasitoid alone compared to the untreated orchard in both years seasons, respectively. The statistical analysis showed significant difference between the effectiveness of the three tested control methods in reducing damage by this pest. Also,  the costs of honeydew moth control compared with  chemical treatments were reduced by 41.1% and  62.5 %  in  grape trees treated with egg- parasitoid combined with Agerin (B.t.) and only egg parasitoid , respectively.
On the other hand, the percentage of increasing  in grape fruit yield/tree was significantly higher in the grape orchards treated with egg parasitoid plus Agerin than (27.43 and 29.09 %)  in those treated with egg parasitoid alone (21.90 and 22.77 %) and insecticides (25.45 and 24.27%) compared to  the control ones in both seasons, respectively.
These results seems to be of great significance when planning for control program against this pest.

DOI

10.21608/ajas.2007.270997

Keywords

biological control, Cryptoblabes gnidiella Mill, grape orchard, Trichogramma evanescens West, Bacillus thuringiensis, Insecticides, Middle Egypt

Authors

First Name

T.H

Last Name

Tohamy,

MiddleName

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Affiliation

Plant Protection Research institute, Agric. Res. Center, Dokki, Giza, Egypt.

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Orcid

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First Name

A.

Last Name

A. Abd El- Raheem

MiddleName

-

Affiliation

Plant Protection Research institute, Agric. Res. Center, Dokki, Giza, Egypt.

Email

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City

-

Orcid

-

First Name

M.

Last Name

I.El Khouly

MiddleName

-

Affiliation

Plant Protection Research institute, Agric. Res. Center, Dokki, Giza, Egypt.

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City

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Orcid

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Volume

38

Article Issue

2

Related Issue

37680

Issue Date

2007-10-01

Receive Date

2007-01-05

Publish Date

2007-10-01

Page Start

93

Page End

111

Print ISSN

1110-0486

Online ISSN

2356-9840

Link

https://ajas.journals.ekb.eg/article_270997.html

Detail API

https://ajas.journals.ekb.eg/service?article_code=270997

Order

11

Type

Original Article

Type Code

62

Publication Type

Journal

Publication Title

Assiut Journal of Agricultural Sciences

Publication Link

https://ajas.journals.ekb.eg/

MainTitle

BIOLOGICAL CONTROL OF THE HONEYDEW MOTH, CRYPTOBLABES GNIDIELLA MILL. IN GRAPE ORCHARDS USING THE LOCAL EGG PARASITOID,TRICHOGRAMMA EVANESCENS WEST. AND AGERIN ( BACILLUS THURINGIENSIS) AS COMPARED WITH RECOMMENDED INSECTICIDES IN MIDDLE EGYPT.

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Article

Created At

22 Jan 2023