Bacterial antagonist
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Gluconobacter asaii (a bacterial antagonist naturally occurring on apple fruit) and bacteriophage were tested as biocontrol agents of Listeria monocytogenes on fresh-cut honeydew melon pieces during low temperature and packing with functional film made by zeolite mixed pegmatite thickness with 20 µm.
5p viisac 23-09-2023 2 1 Download
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In this study, we isolated rice endophytic bacteria and selected strains that have antagonistic activity against Dz for application in controlling the foot rot disease. The endophytic strain VY81 isolated from stem of a rice plant with foot rot disease was studied in details since it had prominent antagonistic activity against Dz.
9p vimulcahy 18-09-2023 7 3 Download
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In vitro analyzing the antagonistic activity of seventy native bacterial isolates towards plant tumorigenic Agrobacterium tumefaciens resulted in a selection of eight potential biocontrol agents. These isolates were screened for their antagonistic effect in vitro as well as their efficacy in reducing gall formation in planta.
7p schindler 30-12-2021 9 0 Download
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These isolates were screened, in vitro, according to their capacities to produce plant growth promoting substance i.e. IAA, phosphate, potassium solubilization, chitinase activities and hydrogen cyanide. Results indicated that 36 bacterial isolates showed IAA production, 25 HCN production, 57 chitinase activities, 39 phosphate and 105 potassium solubilizers.
8p schindler 30-12-2021 9 0 Download
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The in vitro study was conducted to evaluate efficacy of bioagents against Xanthomonas axonopodis pv. vesicatoria causing bacterial leaf spot of chilli. An investigation consisting nine treatments with three replications in Completely Randomized Design was carried out to evaluate in vitro effect of antagonistic microorganism against of Xanthomonas axonopodis pv. vesicatoria.
6p caygaocaolon11 21-04-2021 17 2 Download
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Fusarium wilt is a soil-borne disease, which negatively affects the lentil crop widespread in India and affecting the lentil crop productivity. So the present study was conducted to evaluate the efficacy of bioagents against wilt pathogen Fusarium oxysporum f.sp.lentis of lentil crop through antagonistic activity. Rhizospheric strains were isolated from wilt affected lentil plant in different regions of Eastern UP like Faizabad, Mau, Varanasi, Ghazipur. A total of 20 bacterial strains were isolated and tested for antagonistic activity by co-culture m
11p chauchaungayxua10 19-03-2021 16 2 Download
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This study aims to find antagonistic bacteria that are able to provide the highest resistance to the growth of pathogenic Xoo bacteria in rice plants. Antagonistic bacteria were isolated from the leaves and roots of rice plants through surface sterilization and serial dilution. Obtained 53 bacterial isolates consisting of 20 bacterial isolates from leaves and 33 bacterial isolates from roots tested hypersensitive to tobacco plants for filtering potential non-pathogenic bacteria.
12p chauchaungayxua11 23-03-2021 10 3 Download
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The present study was undertaken to isolate the Fusarium wilt pathogen from the economically important eggplant crop and evaluate the potential of an isolated indigenous strain of fungal and bacterial antagonists under in vitro and screen house conditions.
9p trinhthamhodang9 16-12-2020 11 2 Download
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The present study evaluated the antagonistic effect of the rhizospheric chitinolytic bacterial isolates of rice and green gram soil samples against three phytopathogenic fungi, i.e. Pythium aphanidermatum (ITCC No.-5488), Fusarium oxysporum (ITCC No.-4998) and Rhizoctonia solani (ITCC No.-2060).
7p caygaocaolon8 07-11-2020 10 1 Download
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These chitinase-producing bacterial strains were tested for antagonistic activity against the causal agent of bulb and stem rots of lilies, Fusarium oxysporum, and the results indicated antifungal activity of the four strains HP02, VRQ9, HM03, and GL10. The HP02 strain had the highest level of chitinase activity and was capable of being antagonistic to Fusarium oxysporum. Based on morphological and biochemical characteristics, 16S rRNA gene sequencing, and phylogenetic analysis of this sequence along with sequences from GenBank, HP02 was identified as Bacillus subtilis.
11p gaocaolon8 09-11-2020 19 1 Download
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The bacterial leaf blight of rice caused by Xanthomonas oryazae pv. oryzae is the disease of great economics importance in India especially in Bihar. Management of BLB disease can play a vital role in management of rice disease. In the present investigation evolution of different plant extract (botanical) and new chemical on growth of bacteria by poison food technique and sowing by best botanical and new chemical were conducted and antagonistic activity were tested.
7p trinhthamhodang7 31-08-2020 7 1 Download
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Betulinic acid (BA), a member of pentacyclic triterpenes has shown important biological activities like anti-bacterial, anti-malarial, anti-inflammatory and most interestingly anticancer property.
19p vinaypyidaw2711 26-08-2020 12 2 Download
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The phylloplane and rhizosphere microbes of rose cv. Edward was isolated and nine bacteria were selected to observe their antagonistic efficacy against Diplocarpon rosae causing blackspot disease in rose. The per cent inhibition of mycelial growth of the fungi by bacterial isolates was observed. The bacterial isolates PB1 and PB2 recorded 100 per cent inhibition followed by SB1, PB2 and SB2 isolates.
10p caygaocaolon6 30-07-2020 19 1 Download
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Nanobiotechnology is an emerging field of science that utilizes nanobased systems for various biotechnological and biomedical applications. The synthesis of metal and metal oxide nanoparticles has attracted considerable attention, as they have high surface area and high fraction of atoms which is responsible for their fascinating properties such as antimicrobial, magnetic, electronic and catalytic activity. The antibacterial activities of TiO2 nanoparticles were studied in Staphylococcus aureus and Escherichia coli.
11p kethamoi6 29-06-2020 8 1 Download
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Fusarium oxysporum f. sp. ciceri is one of the most destructive pathogen, causing wilt disease in chickpea and thereby inflicting accountable quantitative (48.29%) as well as qualitative losses. All the six fungal and two bacterial bioagents tested in vitro, exhibited significant mycelial growth inhibition of Fusarium oxysporum f. sp. ciceri. However, Trichoderma viride recorded significantly highest mycelial growth inhibition (75.55%), followed by Trichoderma harzianum (73.77%) Trichoderma koningii (71.88%) and Pseudomonas fluorescens (43.77%).
5p nguaconbaynhay6 23-06-2020 11 1 Download
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Biological control is known to be effective eco-friendly method for the management of crop diseases (Cook and Baker, 1983). Rhizosphere antagonists were isolated from healthy rhizosphere soil samples of chilli collected from major chilli growing areas of Andhra Pradesh. A total of 20 rhizosphere microbes were isolated. Out of which (eight fungal antagonists, ten bacterial antagonists and two fluorescent Pseudomonads) were found to exhibit antagonism against chilli wilt pathogen. On further in vitro evaluation, nine isolates including four fungi, four bacteria and one pseudomonas sp.
6p quenchua6 15-06-2020 9 2 Download
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Pomegranate (Punica granatum L) is one of the important fruit crops grown in India. Leaf spot of pomegranate caused by Alternaria alternata (Fr.) Keissler has becoming a major limiting factor in cultivation of pomegranate in some regions of India. The present investigation was carried out to test the efficacy of bio-agents and botanicals in vitro. All the seven fungal and two bacterial antagonists tested, exhibited significant mycelial growth inhibition of A. alternata. However, T. viride recorded significantly highest mycelial growth inhibition (86.
10p gaocaolon5 14-06-2020 13 0 Download
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A total of 10 samples were collected from Agricultural waste dump sites from various areas of Ladakh and 12 isolates of bacteria were isolated using Nutrient Agar medium. The optimal cultural conditions, microbiological characteristics, biochemical characteristics, antagonistic and synergistic activities within the strains and production of extracellular enzymes of the bacterial strains were documented. Colonies were isolated, cultured and characterized by gram staining and biochemical tests. Six isolates were found to be gram negative while 4 were gram positive.
7p kethamoi5 03-06-2020 14 0 Download
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Stem rot of rice, caused by Sclerotia oryzae is a serious threat to rice production in India. Fungicides only provide limited control of this pathogen but also have ill effects on the environment. In an attempt to develop better integrated strategies for management of this disease, a field study was conducted during rabi 2017-18 to evaluate the strategies of integration of effective fungicide Hexaconazole (0.2 %) and the bacterial antagonistic isolate P.F-4 which were effective against S. oryzae in vitro studies.
5p trinhthamhodang5 16-05-2020 8 1 Download
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Rice leaf blight disease is one of the common diseases in rice-growing countries, including Vietnam. Research methods were conducted such as assessing the growth of microorganisms, to determine the antagonism of microorganisms, the ability to co-grow, the effectiveness of products, to assess the toxicity of probiotics...
7p caygaocaolon5 19-05-2020 6 1 Download