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Enhancement of Pseudomonas flourescense with certain microelements for controlling maize stalk rot caused by Fusarium verticilliodes (SACC.) under greenhouse conditions [electronic resource].

By:

Eraky, Amal M. I

Contributor(s):

Gomaa, Hala H

Language: English Summary language: Arabic Description: P.771 - 780Other title:

تحسين المقاومة البيولوجية لبكتيريا Pseudomonas flourescense باستخدام العناصر الصغرى لمقاومة عفن الساق فى الذرة الشامية المتسبب عن الفطر Fusarium verticilliodes [Added title page title]

Uniform titles:

Mansoura University journal of plant protection and pathology, 2012 v. 3 (8) [electronic resource].

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In: Mansoura University Journal of Plant Protection and Pathology 2012.v.3(8)Summary: F. verticilliodes (Sacc.) Nirenberg (G) is the major pathogen of maize worldwide causing seedling, stalk and ear rots. Five isolates of F. verticilliodes have ability to infect maize Pioneer cultivar plants. The isolates varied in their infectivity, F. verticilliodes isolate 3 gave the highest stalk rot severity in both 2008 and 2009 growing seasons, followed by isolate 4, while isolate 5 was the lowest pathogenic one. In vitro, the microelements [zinc (Zn), manganese (Mn) and copper (Cu)l reduced linear growth of the pathogen. Manganese exhibited the highest toxic effect followed by zinc While, copper exhibited the lowest toxic effect. The antagonistic effects of 3 P. fluresences isolates on mycelial growth of F. verticilliodes were in the range of 55.14 to 79.82%, P. fluresences isolate (P12) considerably more antagonistic than other isolates. Under greenhouse conditions, treatment of maize plants with microelements decreased significantly disease severity. Manganese treatment was more effective than copper and zinc treatments.

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F. verticilliodes (Sacc.) Nirenberg (G) is the major pathogen of maize worldwide causing seedling, stalk and ear rots. Five isolates of F. verticilliodes have ability to infect maize Pioneer cultivar plants. The isolates varied in their infectivity, F. verticilliodes isolate 3 gave the highest stalk rot severity in both 2008 and 2009 growing seasons, followed by isolate 4, while isolate 5 was the lowest pathogenic one. In vitro, the microelements [zinc (Zn), manganese (Mn) and copper (Cu)l reduced linear growth of the pathogen. Manganese exhibited the highest toxic effect followed by zinc While, copper exhibited the lowest toxic effect. The antagonistic effects of 3 P. fluresences isolates on mycelial growth of F. verticilliodes were in the range of 55.14 to 79.82%, P. fluresences isolate (P12) considerably more antagonistic than other isolates. Under greenhouse conditions, treatment of maize plants with microelements decreased significantly disease severity. Manganese treatment was more effective than copper and zinc treatments.

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