Beta
ManageSearchChatDiscover
268648

INCIDENCE OF ROOT-ROT AND WILT DISEASE COMPLEX OF OLIVE TREES IN NEW VALLEY GOVERNORATE IN EGYPT AND ITS CONTROL

Article

Last updated: 01 Jan 2025

OverviewSimilar Items

Subjects

-

Tags

Plant Pathology

Abstract

Root rot and wilt disease complex was detected in different olive tree orchards at El-Kharga, Paris, El-Dakhla and El-Farafrah oases of the New Valley Governorate. Percentage of disease incidence and severity on olive trees in surveyed districts were differed. The average percentage of disease incidence and severity of root rots and wilt disease in surveyed districts were 27.7-54.1% and 35.4-60.3%, respectively. The most frequent isolated fungi from rotted roots of olive trees were Fusarium oxysporum, F. solani, F. moniliforme, F. equiseti and Rhizoctonia solani, while Macrophomina phaseolina, Cylindrocarpon sp < /em>., Acremonium egyptina, Chaetomium olivaceum and Nigrospora oryzae were isolated in less frequency. Frequency of the isolated fungi varied between locations. Fusarium oxysporum was most frequent at all locations, followed by F. solani and R. solani. All the tested fungi were pathogenic to olive transplants, Fusarium oxysporum, F. solani and Rhizoctonia. solani caused the highest root rots incidence and severity. However, Acremonium egyptina, Chaetomium olivaceum and Nigrospora oryzae were non-pathogenic. Efficiency of six different fungicides (Kema-Z, Maxim XL, Rizolex T, Ridomil gold plus, Moncut and Topsin M70) for reducing growth of the tested pathogenic fungi and controlling the disease was studied in vitro and in vivo experiments. Complete inhibition of mycelial growth of the tested fungi was obtained at 50-200 ppm concentrations of Kema-Z, Maxim XL Rizolex-T and Topsin M70, while, the Moncut fungicide completely inhibited the growth of the tested fungi at 100 ppm concentrations. Maxim XL, Rizolex-T and Topsin M70 gave the highest reduction in disease incidence, while, Ridomil gold plus gave the least reduction in disease incidence. Efficiency of Humic acid, as soil drench treatment, varied in reducing incidence of root rot and wilt. Humic acid treatment reduced disease incidence especially when used at 2 and 3% against F. oxysporium, F. solani and Rhizoctonia solani.

DOI

10.21608/ajas.2009.268648

Keywords

Olive trees, transplants, root rot and wilt disease complex, fungicides, Humic acid

Authors

First Name

M.

Last Name

A.E. Hassan

MiddleName

-

Affiliation

Plant Pathology Department, Faculty of Agriculture, Assiut University, Assiut, Egypt

Email

-

City

-

Orcid

-

First Name

M

Last Name

E.A. El-Morsi

MiddleName

-

Affiliation

Plant Pathology Research Institute, Agric. Res. Center, Giza, 72514, Egypt

Email

-

City

-

Orcid

-

First Name

M.

Last Name

E.A. Abo Rehab

MiddleName

-

Affiliation

Plant Pathology Research Institute, Agric. Res. Center, Giza, 72514, Egypt

Email

-

City

-

Orcid

-

First Name

Fatma

Last Name

M. Radwan

MiddleName

-

Affiliation

Plant Pathology Research Institute, Agric. Res. Center, Giza, 72514, Egypt

Email

-

City

-

Orcid

-

Volume

40

Article Issue

1

Related Issue

37530

Issue Date

2009-03-01

Receive Date

2009-01-03

Publish Date

2009-03-01

Page Start

105

Page End

124

Print ISSN

1110-0486

Online ISSN

2356-9840

Article File

AJAS_Volume 40_Issue 1_Pages 105-124.pdf

PDF . 374.8kB

Link

https://ajas.journals.ekb.eg/article_268648.html

Detail API

https://ajas.journals.ekb.eg/service?article_code=268648

Order

8

Type

Original Article

Type Code

62

Publication Type

Journal

Publication Title

Assiut Journal of Agricultural Sciences

Publication Link

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

MainTitle

INCIDENCE OF ROOT-ROT AND WILT DISEASE COMPLEX OF OLIVE TREES IN NEW VALLEY GOVERNORATE IN EGYPT AND ITS CONTROL

Details

Type

Article

Created At

22 Jan 2023