Management of Onion Leaf Blight by Alternaria alternata (FR.) Keissler by Botanicals and Bio-control Agents

Ramjegathesh, R.; Ebenezar, E. G.; Muthusamy, M.

doi:10.3923/ppj.2011.192.196

Cited by 10 publications

(3 citation statements)

References 10 publications

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“…Chethana et al, [16] found cent per cent inhibition of mycelial growth of A. porri by 20% plant fresh aqueous extract of garlic. More or less similar results on antifungal activity of aqueous extracts of different botanicals have also been reported against onion by Prasad and Barvwal, [8]; Saharan et al, [9]; Vijayalakshmi et al, [10]; Ramjegathesh et al, [22]; Abdolahi et al, [24]; Swami and Alane [26]; Agale et al, [28]; Singh et al, [30]. Maximum inhibition of colony growth of A.porri was observed by T.viride which was statistically significantly over all the other bioagents tested-T.harzianum, T.koningii and Bacillus sp.…”

Section: In Vitro Evaluation Of Botanical Extracts On Mycelial Growthsupporting

confidence: 62%

In vitro Evaluation of Botanical Extract, Bioagents and Fungicides against Purple Blotch Diseases of Bunch Onion in Bangladesh

Rahman¹,

Sikder²,

Nusrat³

et al. 2015

azb

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The experiment was carried out to survey for incidence and prevalence of purple blotch disease which ranged from 30.49 to 51.76 percent. Isolation, identification of pathogen and determination of pathogenicity were conducted as well; In-vitro evaluation of some botanical extracts, some commercial fungicides and some antagonistic microorganisms against Alternaria porri were performed. At 5 percent concentration of Adhatoda vasica extract showed the maximum of 91.11% inhibition of mycelial growth of A. porri followed by 60 % and 55.33% of inhibition due to Azadirachta indica and Ocimum sanctum extract respectively. At 10 percent concentration showed similar patterns of mycelial inhibition. The antagonistic effects of four biocontrol agents viz., Trichoderma viride, T. koningii, T. harzianum, Bacillus sp. on mycelia growth of A. porri were studied and maximum reduction in colony growth of A. porri was observed due to T.viride. All the concentrations (0.1g/100 ml; 0.2g/100 ml; 0.3g/100 ml) of Bavistin DF and Companion applied fully inhibited the growth of A. porri.

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Section: In Vitro Evaluation Of Botanical Extracts On Mycelial Growthsupporting

confidence: 62%

In vitro Evaluation of Botanical Extract, Bioagents and Fungicides against Purple Blotch Diseases of Bunch Onion in Bangladesh

Rahman¹,

Sikder²,

Nusrat³

et al. 2015

azb

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“…Purple blotch of onion caused by A. porri (Ellis) Ciff. is one of the most serious disease in India (Gupta et al, 1986;Tripathi et al, 2008;Ramjegathesh et al, 2011). The yield losses of bulb and seed crop in India due to this disease under favourable conditions are upto 97% (Gupta and Pathak, 1998;Lakra, 1999).…”

Section: Introductionmentioning

confidence: 99%

Morphological and Molecular Characterization of Alternaria Isolates Causing Purple Blotch Disease of Onion

Chethana¹,

Ganeshan²,

Rao³

et al. 2018

Int.J.Curr.Microbiol.App.Sci

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“…The need for alternative control strategies, particularly those involving biological control, has increased greatly in the past two decades. Growth inhibition of Alternaria species by the Trichoderma and Pseudomonas metabolites has been well researched [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Exploitation of Fungal and Endophytic Bacteria for the Management of Leaf Blight of Ribbon Plant

Venkatesh¹

2013

J Plant Pathol Microbiol

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Leaf blight of ribbon plant caused by Alternaria alternata is a serious disease in hanging baskets in households. In vitro experiments evaluated the effect of seven isolates of Trichoderma species (from ribbon plant rhizosphere) and ten isolates of endophytic bacteria (from ribbon plant phylloplane) were tested against A. alternata. All the Trichoderma species had varied antagonistic effects against the pathogen. Among them, THA recorded maximum growth inhibition of A. alternata. Most of the bacterial isolates tested were short rods and produced bright fluorescence when exposed to UV light. Among the isolates, EBL 5 produced the largest inhibition zone and the least mycelial growth of A. alternata. The study identified the Trichoderma isolate (THA) and endophytic bacterial isolate (EBL 5) performed well in inhibiting the mycelial growth of test pathogen.

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Management of Onion Leaf Blight by Alternaria alternata (FR.) Keissler by Botanicals and Bio-control Agents

Cited by 10 publications

References 10 publications

In vitro Evaluation of Botanical Extract, Bioagents and Fungicides against Purple Blotch Diseases of Bunch Onion in Bangladesh

In vitro Evaluation of Botanical Extract, Bioagents and Fungicides against Purple Blotch Diseases of Bunch Onion in Bangladesh

Morphological and Molecular Characterization of Alternaria Isolates Causing Purple Blotch Disease of Onion

Exploitation of Fungal and Endophytic Bacteria for the Management of Leaf Blight of Ribbon Plant

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