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Occurrence of some fungal diseases on date palm trees in Egypt and its control / by Reda Ali Ahmed Moussa ; Supervision Prof. Dr. Moustafa Sayed Mansour, Prof. Dr. Magdy Mohamed Mahmoud saber, Dr. Youssef Khamis Youssef.

By: Contributor(s): Material type: TextLanguage: English Summary language: English, Arabic Producer: 2025Description: 69 pages : illustrations ; 25 cm. + CDContent type:
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Other title:
  • حصر لبعض الامراض الفطرية لنخيل البلح في مصر ومكافحتها [Added title page title]
Subject(s): DDC classification:
  • 631.52
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  • Issues also as CD.
Dissertation note: Thesis (M.Sc)-Cairo University, 2025. Summary: This study was conducted during the seasons 2018 – 2020 to investigate the occurrence of some fungal diseases isolated from Governorates Giza, El Beheira, El sharkia, Aswan and New vally at Egypt isolated from leaves of date palm trees and its control. The survey of diseases incidence recorded that the highest disease incidence (DI %) in Giza governorate 75% followed by New vally 72.86%, Aswan 70% and El Beheira 64%, while, the lowest (DI%) recorded in El sharkia governorate with 57.14%. The frequency of the isolated and identified fungi in the present study approved that A. alterrnata recorded the most frequency with (67.38%) followed by N. oryzae (9.93%), L. theobromae (9.22%) and F. solani (7.80%) respectively; meanwhile, the lowest percentage of frequency was recorded for F. oxysporum (5.67%). The pathogenicity proved that L. theobromae was the main pathogenic fungi with 100% colonization on detached leaves treatment followed by F. oxysporum, F. solani and A. alternata at the same percentage 50% colonization, while, N. oryzae recorded the lowest percentage 25% colonization. Regarding biological control, it was showed that the Trichoderma harzianum (I1 and I2) isolates effectively inhibited hyphal growth of all fungi tested. The highest percentage (76.85%) of inhibition zone was recorded for T. harzianum (I1) on Fusarium oxysporum followed by T. harzianum (I2) (70.56 %) on A. alternata, and the antagonism of T. harzianum (I2) on F. oxysporum (68.33%). T. harzianum (I1) and (I2) on N. oryzae (63.15% and 52.78%) respectively. T. harzianum (I1) on A. alternata (47%) and T. harzianum (I1) on F. solani (47.59 %) and T. harzianum (I2 and I1) on L. theobromae 30.74% and 23.33%, respectively. For electrolyzed water test, acidic EW gave the heights effect on all fungus compared with alkaline EW and NaCl without EW, where showed the heights effect on A. alternata with (12.7mm) followed by F. oxysporum, F. solani and N. oryzae with (14.7, 25.3, and 26 mm) respectively, while L. theobromae showed the lowest effect with (52.7 mm). Alkaline EW showed the most effect on A. alternata with (16.7 mm) followed by F. oxysporum, F. solani, N. oryzae and L. theobromae (20.7, 30.7, 38.7 and 56 mm) respectively. Bacillus spp. showed an inhibitory effect on all fungal isolates, the highest inhibition effect was on Alternaria alternata by 42.2% and the lowest inhibition on F. solani by 16.7%. For chemical control tests, Tebuzyn 25% EW, Sevron 50% WDG and Sim-mildew 72% WP were tested and all have significantly reduced the growth of the tested fungi. Moreover, fungicide Tebuzyn 25% EW completely inhibited the growth of F. solani at all tested concentrations while, it caused complete inhibition of the growth of L. theobromae, A. alternata, F. oxysporum and N. oryzae at concentrations 500 and 1000 ppm. Sim-mildew 72% WP was strongly affected on the growth of the tested fungi at 500 and 1000 ppm concentrations. Moreover, Sim-mildew 72% WP completely inhibited the growth of N. oryzae at concentration 1000 ppm. Sevron 50% WDG recorded a weak effect on the mycelia growth of all tested fungi at concentrations 500 and 1000 ppm. Summary: أجريت هذه الدراسة خلال المواسم 2018 – 2020 لحصر بعض مسببات الامراض الفطرية على نخيل البلح في مصر ومكافحتها، وأظهرت نتيجة حصر انتشار بعض المسببات الفطرية في محافظات مصر التي كانت تحت الدراسة هي الجيزة – الشرقية – البحيرة – اسوان – الوادي الجديد. كانت اعلى نسبة لانتشار المسببات الفطرية هي محافظة الجيزة يليها الوادي الجديد واسوان بينما اقل المحافظات في انتشار المسببات الفطرية كانت الشرقية والبحيرة. كما أظهرت نتيجة العزل والتعريف ان اكثر الفطريات انتشارا هو فطر Alternaria alternataيليه Nigrospora oryzae و Lasiodiplodia theobromaeو Fusarium oxysporum ثم Fusarium solaniواظهرت نتيجة العدوى الصناعية ان أكثر الفطريات شراسة هو فطر Lasiodiplodia theobromae وأقل الفطريات شراسة هو الفطر Nigrospora oryzae. في المكافحة البيولوجية استخدم بكتريا Bacillus spp واحدثت اقوى تثبيط لنمو الفطريات على الفطر Alternaria alternata ، وأيضا استخدم عزلتين من الفطر Trichoderma harzinum ( T2 , T1 ) حيث كان اقوى تأثير للعزلة T1 على الفطر Fusarium oxysporum والعزلة T2 كان اقوى تأثير لها على الفطر Alternaria alternata.استخدم في المكافحة الكيماوية ثلاثة مبيدات فطريه هي Tebuzyn 25% EW و Sim-mildew 72% WP و Sevron 50% WDG بالإضافة الى استخدام أربعة تركيزات لكل مبيد هي 10 و 100 و 500 و 1000 جزء في المليون بالإضافة الى الغير معامل، حيث اظهرت النتائج ان المبيد Tebuzyn 25% EW كان له اقوى تأثير مثبط على جميع الفطريات وصلت النسبة الى 100 % عند استخدام جميع التركيزات 500 و 1000 جزء في المليون ثم يأتي بعد ذلك المبيد Sim-mildew 72% WP ثم Sevron 50% WDG. ومن الطرق الحديثة في مكافحة الفطريات هو الفصل الكهربي للماء وهو من الطرق البديلة للاستخدام المبيدات حيث تم اجراء فصل الماء الى نوعين (حامضي وقلوي) ووجد أن الماء الحامضي اقوى تأثيرا على جميع الفطريات يليه الماء القلوي.
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Thesis قاعة الرسائل الجامعية - الدور الاول المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.07.16.M.Sc.2025.Re.O (Browse shelf(Opens below)) Not for loan 01010110093049000

Thesis (M.Sc)-Cairo University, 2025.

Bibliography: pages 60-69.

This study was conducted during the seasons 2018 – 2020 to investigate the occurrence of
some fungal diseases isolated from Governorates Giza, El Beheira, El sharkia, Aswan and New vally
at Egypt isolated from leaves of date palm trees and its control. The survey of diseases incidence
recorded that the highest disease incidence (DI %) in Giza governorate 75% followed by New vally
72.86%, Aswan 70% and El Beheira 64%, while, the lowest (DI%) recorded in El sharkia
governorate with 57.14%. The frequency of the isolated and identified fungi in the present study
approved that A. alterrnata recorded the most frequency with (67.38%) followed by N. oryzae
(9.93%), L. theobromae (9.22%) and F. solani (7.80%) respectively; meanwhile, the lowest
percentage of frequency was recorded for F. oxysporum (5.67%). The pathogenicity proved that L.
theobromae was the main pathogenic fungi with 100% colonization on detached leaves treatment
followed by F. oxysporum, F. solani and A. alternata at the same percentage 50% colonization,
while, N. oryzae recorded the lowest percentage 25% colonization. Regarding biological control, it
was showed that the Trichoderma harzianum (I1 and I2) isolates effectively inhibited hyphal growth
of all fungi tested. The highest percentage (76.85%) of inhibition zone was recorded for T. harzianum
(I1) on Fusarium oxysporum followed by T. harzianum (I2) (70.56 %) on A. alternata, and the
antagonism of T. harzianum (I2) on F. oxysporum (68.33%). T. harzianum (I1) and (I2) on N. oryzae
(63.15% and 52.78%) respectively. T. harzianum (I1) on A. alternata (47%) and T. harzianum (I1)
on F. solani (47.59 %) and T. harzianum (I2 and I1) on L. theobromae 30.74% and 23.33%,
respectively. For electrolyzed water test, acidic EW gave the heights effect on all fungus compared
with alkaline EW and NaCl without EW, where showed the heights effect on A. alternata with
(12.7mm) followed by F. oxysporum, F. solani and N. oryzae with (14.7, 25.3, and 26 mm)
respectively, while L. theobromae showed the lowest effect with (52.7 mm). Alkaline EW showed
the most effect on A. alternata with (16.7 mm) followed by F. oxysporum, F. solani, N. oryzae and
L. theobromae (20.7, 30.7, 38.7 and 56 mm) respectively. Bacillus spp. showed an inhibitory effect
on all fungal isolates, the highest inhibition effect was on Alternaria alternata by 42.2% and the
lowest inhibition on F. solani by 16.7%. For chemical control tests, Tebuzyn 25% EW, Sevron 50%
WDG and Sim-mildew 72% WP were tested and all have significantly reduced the growth of the
tested fungi. Moreover, fungicide Tebuzyn 25% EW completely inhibited the growth of F. solani at
all tested concentrations while, it caused complete inhibition of the growth of L. theobromae, A.
alternata, F. oxysporum and N. oryzae at concentrations 500 and 1000 ppm. Sim-mildew 72% WP
was strongly affected on the growth of the tested fungi at 500 and 1000 ppm concentrations.
Moreover, Sim-mildew 72% WP completely inhibited the growth of N. oryzae at concentration 1000
ppm. Sevron 50% WDG recorded a weak effect on the mycelia growth of all tested fungi at
concentrations 500 and 1000 ppm.

أجريت هذه الدراسة خلال المواسم 2018 – 2020 لحصر بعض مسببات الامراض الفطرية على نخيل البلح في مصر ومكافحتها، وأظهرت نتيجة حصر انتشار بعض المسببات الفطرية في محافظات مصر التي كانت تحت الدراسة هي الجيزة – الشرقية – البحيرة – اسوان – الوادي الجديد. كانت اعلى نسبة لانتشار المسببات الفطرية هي محافظة الجيزة يليها الوادي الجديد واسوان بينما اقل المحافظات في انتشار المسببات الفطرية كانت الشرقية والبحيرة. كما أظهرت نتيجة العزل والتعريف ان اكثر الفطريات انتشارا هو فطر Alternaria alternataيليه Nigrospora oryzae و Lasiodiplodia theobromaeو Fusarium oxysporum ثم Fusarium solaniواظهرت نتيجة العدوى الصناعية ان أكثر الفطريات شراسة هو فطر Lasiodiplodia theobromae وأقل الفطريات شراسة هو الفطر Nigrospora oryzae. في المكافحة البيولوجية استخدم بكتريا Bacillus spp واحدثت اقوى تثبيط لنمو الفطريات على الفطر Alternaria alternata ، وأيضا استخدم عزلتين من الفطر Trichoderma harzinum ( T2 , T1 ) حيث كان اقوى تأثير للعزلة T1 على الفطر Fusarium oxysporum والعزلة T2 كان اقوى تأثير لها على الفطر Alternaria alternata.استخدم في المكافحة الكيماوية ثلاثة مبيدات فطريه هي Tebuzyn 25% EW و Sim-mildew 72% WP و Sevron 50% WDG بالإضافة الى استخدام أربعة تركيزات لكل مبيد هي 10 و 100 و 500 و 1000 جزء في المليون بالإضافة الى الغير معامل، حيث اظهرت النتائج ان المبيد Tebuzyn 25% EW كان له اقوى تأثير مثبط على جميع الفطريات وصلت النسبة الى 100 % عند استخدام جميع التركيزات 500 و 1000 جزء في المليون ثم يأتي بعد ذلك المبيد Sim-mildew 72% WP ثم Sevron 50% WDG. ومن الطرق الحديثة في مكافحة الفطريات هو الفصل الكهربي للماء وهو من الطرق البديلة للاستخدام المبيدات حيث تم اجراء فصل الماء الى نوعين (حامضي وقلوي) ووجد أن الماء الحامضي اقوى تأثيرا على جميع الفطريات يليه الماء القلوي.

Issues also as CD.

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