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87019

Role of Purpureocillium lilacinum Cultural Filtrate in Controlling Onion White Rot

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Last updated: 22 Jan 2023

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Abstract

Onion white rot is one of the most destructive diseases threat onion production in Egypt. The present study assessed the effect of Purpureocillium lilacinum culture filtrates in vitro and in vivo conditions on Stromatinia cepivora at 75%concentration.  Bioagent culture filtrates inhibited the mycelial growth, sclerotial formation and myceliogenic germination of S. cepivora by 82.59, 100 and 93.33%, respectively. The culture filtrates at 75% increased cell membrane permeability of S. cepivora compared to the control. The in vitro analysis revealed that 92.5% of the sclerotia were lost its activity in the soil when treated with filtrates and significantly decreased the disease incidence and severity by 95.10 and 98.30%, respectively under greenhouse conditions. However, soil previously infested with S. cepivora sclerotia and handled continuously with bioagent culture filtrate for 6 months before onion cultivation undoubtedly decreased the disease incidence and severity. During 6 months after field culture filtrates treatment, more than 80 and 60% of the sclerotia failed to emergence in trial I and II plots experiment, respectively. After one-year culture filtrate treatment in consecutive onion field crop cultivation, filtrates were more efficient than control in decreasing white rot incidence attendant with low inoculum density trial field (77.67sclerotia/kg of soil). Consequently, a decrease in white rot incidence resulting promotion to vegetative parameters of culture filtrate treated onion plants in pots and increase growth and bulb yield productivity in field. Decreasing disease incidence and severity was associated with increase activities of antioxidant enzymes polyphenol oxidase, peroxidase and chitinase by application of culture filtrates.

DOI

10.21608/jppp.2020.87019

Keywords

Onion white rot, Stromatinia cepivora, Purpureocillium lilacinum, culture filtrates, antioxidant-related enzymes

Authors

First Name

M.

Last Name

Ali

MiddleName

A. S.

Affiliation

Plant Pathol. Dept., Fac. Agric., Zagazig Univ., Egypt

Email

melderiby@yahoo.com

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Orcid

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Volume

11

Article Issue

3

Related Issue

12786

Issue Date

2020-03-01

Receive Date

2020-05-05

Publish Date

2020-03-01

Page Start

175

Page End

184

Print ISSN

2090-3677

Online ISSN

2090-3758

Link

https://jppp.journals.ekb.eg/article_87019.html

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https://jppp.journals.ekb.eg/service?article_code=87019

Order

3

Type

Original Article

Type Code

888

Publication Type

Journal

Publication Title

Journal of Plant Protection and Pathology

Publication Link

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

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Article

Created At

22 Jan 2023