Synergistic effect of combinations of fungicides and bacterial extracts against Phomopsis azadirachtae causing die-back of neem

Girish, K. and Shankara Bhat, S. and Raveesha, K. A. (2012) Synergistic effect of combinations of fungicides and bacterial extracts against Phomopsis azadirachtae causing die-back of neem. AFRICAN JOURNAL OF MICROBIOLOGY RESEARCH, 6 (2). pp. 385-392.

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Official URL: http://dx.doi.org/10.5897/AJMR11.1154

Abstract

Phomopsis azadirachtae causes die-back of neem and this disease is presently a major devastating disease of neem in India, resulting in the reduction of life expectancy and flower production. Development of effective, eco-friendly management strategies against this disease is most important. Two systemic fungicides carbendazim and thiophanate- methyl were combined with ethyl acetate extract of antagonistic bacteria Pseudomonas aeruginosa culture filtrate at different concentrations viz., 100F: 0E, 80F: 20E, 60F: 40E, 50F: 50E, 40F: 60E, 20F: 80E, 0F: 100E and evaluated against P. azadirachtae under in vitro conditions. The parameters studied were colony diameter, mycelial dry weight, pycnidial formation and the germ tube growth of the pathogen. The effect of these combinations on neem seed germination and seed-borne pathogen was also tested. The results indicated that the combinations tested were effective in inhibiting the growth of the pathogen in vitro. The combinations also inhibited the growth of P. azadirachtae from die-back infected neem seeds and had no significant negative effect on neem seed germination. These combinations could be utilized for the integrated control of die-back of neem.

Item Type: Article
Uncontrolled Keywords: Die-back of neem; Phomopsis azadirachtae; integrated management; Pseudomonas aeruginosa; carbendazim; thiophanate-methyl
Subjects: Agriculture Biological Sciences > Botany
University of Mysore > PG Campuses > Manasagangotri, Mysore > Agriculture Biological Sciences > Botany

Agriculture Biological Sciences > Microbiology
University of Mysore > PG Campuses > Manasagangotri, Mysore > Agriculture Biological Sciences > Microbiology
Divisions: PG Campuses > Manasagangotri, Mysore > Botany
PG Campuses > Manasagangotri, Mysore > Microbiology
Depositing User: Swamy D
Date Deposited: 28 May 2013 11:00
Last Modified: 13 Aug 2013 10:00
URI: http://eprints.uni-mysore.ac.in/id/eprint/9449

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