In vitro evaluation for antagonistic potential

Tomato (Solanum lycopersicum Mill.) is one of the most remunerative and widely grown vegetables in the world. The area under tomato cultivation in Manipur accounts for about 0.15 million hectares with an average production of 2.10 million tonnes and productivity of 12.02 tonnes ha-1 during 2016-17.

9p chauchaungayxua10 19-03-2021 12 2   Download

Cowpea is an important leguminous vegetable crop usually grown during Pre-kharif, Kharif and Rabi season under West Bengal condition. Now days this crop is severely affected due to biotic stress. Seven foliar pathogens namely Alternaria alternata, Colletotrichum capsici, Corynespora cassicola, Rhizoctonia solani, Fusarium ciceri, Sclerotium rolfsii and Curvularia lunata were isolated from the diseased cowpea crop in Jaguli Instructional farm of BCKV.

14p caygaocaolon8 07-11-2020 13 1   Download

Antagonistic potentiality of four isolates of Trichoderma species viz. Trichoderma viride isolate A, Trichoderma viride isolate M, Trichoderma harzianum isolate C and Trichoderma harzianum isolate L against Beauveria bassiana causing white muscardine disease of Silk worm, Bombyx mori L, was studied invitro by studying the mycelial interaction between them as well as by the effect of culture filtrate of biocontrol agents on sporulation and spore germination of pathogen.

7p angicungduoc6 22-07-2020 12 1   Download

Effect of eight antagonists viz., Trichoderma atroviride, T. harzianum, T. virens, T. fasciculatum, T. asperellum, T. viride, Pseudomonas fluorescens and Bacillus subtilis were studied for their antagonism against Macrophomina phaseolina by dual culture method and six fungicides viz. Azoxystrobin 23 SC, Carbendazim (12%) + Mancozeb (63%) 75 WP, Carbendazim (25%) + Mancozeb (50%) 75 WS were evaluated at two different concentrations (500 ppm and 1000 ppm) by poisoned food technique against the same pathogen.

7p quenchua6 15-06-2020 9 2   Download

The aim of the study was to access the anti-bacterial and anti-fungal activity on the growth of Alternaria porri under in vitro condition. The antagonistic activity of bacterial and fungal antagonists (Pseudomonas and Trichoderma spp.) was determined by the dual culture technique both on King’s B and PDA media respectively, Paper disc assay and Agar well mathod. Plates were incubated at 28ºC for 7 days and 2 days. The antagonistic activity of these antagonists was evaluated by mycelial growth and mycelial dry weight of test fungus (Alternaria porri).

6p chauchaungayxua5 08-05-2020 16 0   Download

Efficacy of three potential microbial bioagents, viz. Trichoderma viride, Bacillus thuringiensis, Pseudomonas fluorescens were evaluated against bacterial wilt of lettuce under hydroponic culture system. The microbial bioagents were tested in vitro for their antagonistic properties against Ralstonia solanacearum, the causal agent of bacterial disease in lettuce. Bioagents applied alone or as consortia, significantly reduced bacterial wilt pathogen in vitro producing varying sizes of inhibition zones in TTC medium.

10p nguaconbaynhay5 11-05-2020 14 1   Download

Lentil (Lens culinaris Medik) is an important crop, the major states producing lentil are Madhya Pradesh, Uttar Pradesh, Bihar and Punjab. Lentil is an important component of farming systems in our country. It is one of the important and most nutritious rabi pulses. Vascular wilt causing by Fusarium oxysporum f.sp. lentis, Sclerotium rolfsii Sacc. causing collar rot and Sclerotinia sclerotiorum (Lib.) de Bary) causing stem rot, is most destructive soil borne diseases of lentil growing area worldwide. Use of chemicals continues to be major strategy to mitigate the menace of crop disease.

7p chauchaungayxua3 07-02-2020 14 1   Download

This work was aimed at isolating AHL degrading bacteria from fish culture pond soil, with abilities appropriate for use as probiotic in aquaculture. The presence of an autoinducer inactivation (aiiA) homologue gene and AHL-inactivation assay showed that BacillusthuringiensisQQ17, which was one among the 20 isolates, could rapidly degrade synthetic C6-HSL in vitro and hampered violacein production by Chromobacterium violaceum.

16p nguathienthan2 19-12-2019 6 0   Download

Endophytes are the micro-organism which shares the life long relation with the host. The bacterial endophytes promote the growth directly and indirectly by several mechanisms. Keeping in mind, the present investigation has been carried out to evaluate the bacterial endophytes for their plant growth promotion in vitro condition. Four screened bacterial antagonists viz., SVC 11, BE 1, NGB 21 and M1W1 were evaluated for the germination and the vigour of French bean, brinjal and rapeseed mustard seeds. The bacteria were used individual as well as in consortium mode on the respective seeds.

9p quenchua2 15-12-2019 23 0   Download

Plant growth promoting rhizobacteria are the soil bacteria present around the rhizopshere and are involved in promoting plant growth and development via different mechanisms. In order to promote sustainable agriculture, the present investigations were undertaken to screen the PGPR isolates from the plant rhizosphere. A total of eight rhizobacteria were isolated from the wheat plant rhizosphere.

10p kethamoi2 14-12-2019 19 0   Download

Multidrug-resistant bacterial strains are becoming a serious problem. Therefore, the application of natural antimicrobial agents from plant extracts combined with antibiotics to overcome this problem is of major importance. The antimicrobial activity of five plants (Rosemary, Marjoram, Mint, Dill and Neem) methanol extract prepared by ultrasonicassisted (UAE) combined with antibiotics (amoxicillin, doxycycline, gentamicin and difloxacin) against 41 Salmonella poultry isolates was tested using in vitro methods.

12p kethamoi2 14-12-2019 20 0   Download

Bio-controlling of potato foliar pathogens could be an alternative and eco-friendly management. Therefore, in this trial, the antagonistic potential of some bio-controlling agents (BCAs) of Trichoderma spp. (Trichoderma asperillum, Trichoderma longibrachiatum and Trichoderma harzianum) and Bacillus spp.

21p kequaidan2 13-12-2019 17 1   Download