BIOCONTROL POTENTIAL OF SOME PSEUDOMONAS FLUORESCENS AND BACILLUS SUBTILIS ISOLATES ON SEEDLING DAMPING–OFF OF COTTON IN FIELD CONDITION

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MAHMOUD JANLOU H.A.; NASR ELAHNEZHAD S.; HEYDARI ASGHAR

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Journal: Iranian Plant Protection Research Year:2008 | Volume:22 | Issue:1 Page(s): 89-100

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Title

BIOCONTROL POTENTIAL OF SOME PSEUDOMONAS FLUORESCENS AND BACILLUS SUBTILIS ISOLATES ON SEEDLING DAMPING–OFF OF COTTON IN FIELD CONDITION

Author(s)

MAHMOUD JANLOU H.A. | NASR ELAHNEZHAD S. | HEYDARI ASGHAR | Issue Writer Certificate

Keywords

COTTONQ3

PSEUDOMONASQ2

BACILLUSQ1

BIOCONTROLQ2

DAMPING-OFFQ3

PYTHIUMQ3

RHIZOCTONIAQ2

Abstract

One of the most important COTTON diseases in Iran is post emergence COTTON seedling damping –off which causes significant losses annually. The most important agents of these diseases in Iran are PYTHIUM spp. and RHIZOCTONIA solani. In this study the possibility of biological control using bacterial antagonists in the field was investigated. Five bacterial isolates (three belonging to PSEUDOMONAS fluorescens and two BACILLUS spp.) were selected for this study based on their performances in the greenhouse experiments. Two COTTON varieties (Sahel and Saiokra) were used in this experiment and seed coating procedure was followed for bacterial application. The study was carried out in a COTTON fields in Golestan province during 1381 and 1382 (2002 and 2003) growing seasons. Two commonly used fungicides (Carbendazim and Carboxin thiram) were also used for comparison. The efficacy of bacterial isolates and fungicides was evaluated based on the number of healthy seedlings (stand) 15, 30, 45 and 60 days after sowing. Results indicated that three bacterial isolates (one PSEUDOMONAS fluorescens and two BACILLUS spp.) along with fungicides showed the most effectiveness in control of COTTON seedlings against DAMPING-OFF disease in both years. The results obtained for two COTTON varieties in different years varied but the differences were not statistically significant. The differences in the obtained results in different years may be due to the variation in environmental conditions. The overall result of this study shows the possibility of using antagonistic bacteria and fungicides in the COTTON fields as biological control agents (BCA).

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مهار بیولوژیک عوامل بیماری زای گیاهی خاکزی در محیط اطراف ریشه (ریزوسفر) توسط باکتریها

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APA: Copy

MAHMOUD JANLOU, H.A., NASR ELAHNEZHAD, S., & HEYDARI, ASGHAR. (2008). BIOCONTROL POTENTIAL OF SOME PSEUDOMONAS FLUORESCENS AND BACILLUS SUBTILIS ISOLATES ON SEEDLING DAMPING–OFF OF COTTON IN FIELD CONDITION. IRANIAN PLANT PROTECTION RESEARCH (JOURNAL OF PLANT PROTECTION), 22(1), 89-100. SID. https://sid.ir/paper/142793/en

Vancouver: Copy

MAHMOUD JANLOU H.A., NASR ELAHNEZHAD S., HEYDARI ASGHAR. BIOCONTROL POTENTIAL OF SOME PSEUDOMONAS FLUORESCENS AND BACILLUS SUBTILIS ISOLATES ON SEEDLING DAMPING–OFF OF COTTON IN FIELD CONDITION. IRANIAN PLANT PROTECTION RESEARCH (JOURNAL OF PLANT PROTECTION)[Internet]. 2008;22(1):89-100. Available from: https://sid.ir/paper/142793/en

IEEE: Copy

H.A. MAHMOUD JANLOU, S. NASR ELAHNEZHAD, and ASGHAR HEYDARI, “BIOCONTROL POTENTIAL OF SOME PSEUDOMONAS FLUORESCENS AND BACILLUS SUBTILIS ISOLATES ON SEEDLING DAMPING–OFF OF COTTON IN FIELD CONDITION,” IRANIAN PLANT PROTECTION RESEARCH (JOURNAL OF PLANT PROTECTION), vol. 22, no. 1, pp. 89–100, 2008, [Online]. Available: https://sid.ir/paper/142793/en

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