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159564

THE RELATIVE SUSCEPTIBILITY OF CERTAIN OKRA VARIETIES AGAINST THE SPINY BOLLWORM EARIAS INSULANA (BOISD.) (LEPIDOPTERA: NOCTUIDAE)

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Last updated: 04 Jan 2025

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Abstract

Fourteen okra varieties were tested in Assiut governorate to estimate their fruit infestation degrees caused by the spiny bollworm Earias insulana (Boisd.) and to determine their susceptibility degrees against this insect pest. Irany, Red base and Balady 4 okra varieties recorded the highest infestation values with an average of 11.92% > 10.40% > 9.13%, respectively. However, Oraby, Balady 5 and Balady 6 okra varieties recorded the lowest values with an average of 6.93% > 6.79% > 6.75%, respectively, as an average of the two successive seasons of 2009 and 2010. The highest infestation was recorded during the last three weeks of August. Dependent on the mean numbers of (Bores + larvae), the tested varieties revealed different susceptibility degrees to the pest. Balady 5 and Balady 6 varieties harboured the lowest numbers and appeared as highly resistant (HR) varieties. The remaining varieties revealed different susceptibility degrees to the pest. Negative correlation was recorded between the numbers of hairs presented on fruit surface of both Balady 5 and Balady 6 varieties and the pest infestation. Therefore, okra varieties that showed some sort of resistance can be included among advanced breeding programs to select new varieties resistance to E. insulana.

DOI

10.21608/ejar.2012.159564

Authors

First Name

MOHAMED A.

Last Name

AMRO

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Affiliation

Plant Protection Research Institute, Agricultural Research Center, Dokki, Giza, Egypt.

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First Name

GAMAL H.

Last Name

ABD EL-RAHIM

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Affiliation

Horticulture Department, Faculty of Agriculture, El-Azhar University, Assiut. Egypt.

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First Name

YASER M.

Last Name

ABDEL-GALIL

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Affiliation

Plant Protection Research Institute, Agricultural Research Center, Dokki, Giza, Egypt.

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Volume

90

Article Issue

1

Related Issue

23311

Issue Date

2012-03-01

Receive Date

2011-10-05

Publish Date

2012-01-10

Page Start

93

Page End

107

Print ISSN

1110-6336

Online ISSN

2812-4936

Link

https://ejar.journals.ekb.eg/article_159564.html

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https://ejar.journals.ekb.eg/service?article_code=159564

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7

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Original Article

Type Code

1,041

Publication Type

Journal

Publication Title

Egyptian Journal of Agricultural Research

Publication Link

https://ejar.journals.ekb.eg/

MainTitle

THE RELATIVE SUSCEPTIBILITY OF CERTAIN OKRA VARIETIES AGAINST THE SPINY BOLLWORM EARIAS INSULANA (BOISD.) (LEPIDOPTERA: NOCTUIDAE)

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Article

Created At

22 Jan 2023