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International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2018, Volume : 6, Issue : 1
First page : (1486) Last page : (1493)
Article doi: http://dx.doi.org/10.18782/2320-7051.3016

Screening of Bioagents against Wilt Complex Pathogens of Tomato

Jagadish, S. G.1, Mallesh, S. B.2*, Jaipraksah Narayan R. P.3 and Mallikarjun Dhotre3
1PG, Student, Dept. of Plant Pathology, UAS, Raichur
2Assistant Professor (Plant Pathology), College of Agriculture, UAS, Raichur
3Assistant Professor (Horticulture), AC, Bheemarayanagudi, UAS, Raichur, Karnataka
*Corresponding Author E-mail: sbmallesh@gmail.com
Received: 24.05.2017  |  Revised: 29.06.2017   |  Accepted: 5.07.2017  


Bioagents like Tv-1, Th-1, Pl-1 and Pc-1 and two bacterial bioagents (Pf-1, and Bs-1) isolated from healthy rhizosphere of tomato from North Eastern parts of Karnataka (NEK) were maintained and tested their efficacy against wilt complex pathogens of tomato (Fusarium oxysporum f. sp. lycopersici and Meloidogyne incognita). Bioagents are evaluated against Fusarium for their mycelial inhibition under dual culture technique. The per cent inhibition varied from 16.66 to 58.00 with a mean of 32.41. The results obtained were highly significant between the different bioagents tested and also over control. Maximum inhibition of 58.00 per cent was observed in Trichoderma viride followed by T. harzianum (57.77) and Paecilomyces lilacinus (35.55). Least inhibition of 16.66 per cent was observed in Bacillus subtilis followed by Pseudomonas fluorescens (25.55). Efficacy of different bioagents against root knot nematode by using culture filtrates of bioagents at 100, 75, 50 and 25 per cent significantly inhibited the hatching of eggs. The greatest decrease in egg hatching was recorded (8.67) with the bioagent P. lilacinus, T. viride (10.33) and Pochonia chlamydospora (11.00) in treatment concentration interaction (82.66, 79.34 and 78.00 per cent inhibition) over control respectively. Maximum number of juveniles were hatched in control (50.00) followed by 45.03 in Bacillus subtilis at 25 per cent concentration.

Key words: Bioagent, Trichoderma, Pseudomonas, Wilt complex, Tomato

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Jagadish, S. G., Mallesh, S. B., Jaipraksah Narayan R. P. and Dhotre, M., Screening of Bioagents against Wilt Complex Pathogens of Tomato, Int. J. Pure App. Biosci. 6(1): 1486-1493 (2018). doi: http://dx.doi.org/10.18782/2320-7051.3016