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87404

SUSCEPTIBILITY OF 13 OKRA GENOTYPES TO INFESTATION WITH SOME PESTS AS CORRELATED TO LEAF MORPHOLOGY

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Last updated: 04 Jan 2025

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Abstract

        The present research work aimed to differentiate between thirteen okra genotypes from the point of its susceptibility to infestation  by some sucking pests(Empoasca discipiens (Paoli) , ,Aphis gossypii (Glover);,Bemisia tabaci (Genn.),Tetranychus urticae (Koch) and, Liromyaza  trifolii (Burg)) during two summer plantation 2010 and 2011.  Results clearly indicated that there was significantly positive correlation  between the number of hairs on leaf lamina and population of whiteflies (r= +0.944**) and mites (r=+ 0.983**). Hairiness of the leaves influences the population of aphids, leaf miner, whiteflies, mite and leafhopper  populations to the extent of 82,85.,89, 94 and97 per cent, respectively. There was significantly negative correlation  between pest population and mid-vein hair density  for, leaf miner(r =-0.928**) ,  aphids (r= -0.938**) and leafhopper (r= -0.985**),  thus it appears to be an important factor in imparting biophysical resistance in okra against these pests. Whereas, significantly positive  correlation was observed between population of whitefly, mite, and mid-vein hair density (r= +0.967**and+0.968**) favoring  to the whitefly and mite population buildup. Influence of mid-vein hair density on different sucking pests population e.g., leaf miner, aphids, , whiteflies, mite and leafhoppers was to the extent of 80, 89, 94,97 and 98 per cent, respectively. Overall impact of midrib thickness on the population of some pests e.g., whiteflies, aphids, leaf miner , mite and leafhoppers was to the extent of 64,72,75, 80and 88 per cent, respectively . However, from the present study on interactions of okra genotypes  against some sucking pests, it can be concluded that the genotypes Balady(B),Mansoura Red (HM), are susceptible for (aphids, mites, whitefly,leaf miner and leafhopper, respectively). While genotypes Roomy (R), Str.L1, Str.L3, Str.L4, Str.L6 and Str.L8 were considered as moderate. In the mean time, Str.L9, Str.L5, Cairo Red (HK(,Str.L6 and Str.L7, are resistant against (aphids, mites, whitefly,leaf miner and leafhopper, respectively) and can be recommended for cultivation in areas where high incidence of these pests are noticed.

DOI

10.21608/jppp.2013.87404

Keywords

okra, Pests, genotypes, susceptibility, resistance, morphological characters

Authors

First Name

Eftkhar

Last Name

Abou Hatab

MiddleName

E. M.

Affiliation

Plant Protection Research Institute, ARC,Giza,Egypt.

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Orcid

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First Name

Soher

Last Name

Elgendy

MiddleName

E. A.

Affiliation

Vegetable Res. Dept., Horticultural. Res. Inst., ARC, Egypt.

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Volume

4

Article Issue

6

Related Issue

13120

Issue Date

2013-06-01

Receive Date

2020-05-06

Publish Date

2013-06-01

Page Start

561

Page End

570

Print ISSN

2090-3677

Online ISSN

2090-3758

Link

https://jppp.journals.ekb.eg/article_87404.html

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https://jppp.journals.ekb.eg/service?article_code=87404

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5

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Original Article

Type Code

888

Publication Type

Journal

Publication Title

Journal of Plant Protection and Pathology

Publication Link

https://jppp.journals.ekb.eg/

MainTitle

SUSCEPTIBILITY OF 13 OKRA GENOTYPES TO INFESTATION WITH SOME PESTS AS CORRELATED TO LEAF MORPHOLOGY

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Article

Created At

22 Jan 2023