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Srivastava, R. K.
- Relative Antagonistic Effect of Different Isolates of Trichoderma Viride and T. harzianum against Phytophthora capsici - A Bell Pepper Pathogen
Abstract Views :240 |
PDF Views:140
Authors
Affiliations
1 Department of Plant Pathology, Crop Research Station, Bahraich, 271801, Uttar Pradesh, IN
2 Oilseeds Research, Rajendranagar, Hyderabad, 500030, Andhra Pradesh, IN
1 Department of Plant Pathology, Crop Research Station, Bahraich, 271801, Uttar Pradesh, IN
2 Oilseeds Research, Rajendranagar, Hyderabad, 500030, Andhra Pradesh, IN
Source
Journal of Biological Control, Vol 25, No 3 (2011), Pagination: 239-241Abstract
Isolates of Trichoderma viride and T. harzianum were tested for their myco-parasitic ability and relative antagonistic effect that showed all the Trichoderma isolates inhibited significantly the growth of the pathogen and it ranged from 62.73% (T. viride 1) to 45.37% (T. viride PDBC TV 23). Germination per cent ranged from 78.8 (T. viride 3) to 98.9 (T. viride PDBC TV 23) when treated with bio-agents, whereas in pathogen check it was only 73.3%. Maximum vigor index (547.3) was recorded in T. viride (PDBC TV 23), whereas in pathogen check it was 84.7 only. Fungicide treatment exhibited almost equal disease incidence and in pathogen check, it was as high as 68.9%, while minimum (16.7%) plant mortality was recorded in seeds treated with T. viride 1. In fungicidal treatment 33% plant mortality was recorded while in pathogen check it was highest (46.7%). The results obtained clearly indicated that the efficacy of different isolates of the same species also showed variation when tested against the same pathogen. Therefore, it may be concluded that before application in the field the potentiality of every strain of the bioagents should be tested against the target pathogen.Keywords
Antagonist, Trichoderma Spp, Phytophthora capsici, Bell Pepper.Full Text
References
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- Kim, C. H., Jee, H. J., Park, K. S. and Lee, E. J. 1990. Studies on biological control of Phytopthora blight of red pepper and performance of antagonistic agents in fields. Korean Journal of Plant Pathology, 6: 201–206.
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- Management of Macrophomina Disease Complex in Jute (Corchorus olitorius) by Trichoderma viride
Abstract Views :210 |
PDF Views:122
Authors
Affiliations
1 N. D. University of Agriculture and Technology, Department of Plant Pathology, Crop Research Station, Bahraich 271801, Uttar Pradesh, IN
1 N. D. University of Agriculture and Technology, Department of Plant Pathology, Crop Research Station, Bahraich 271801, Uttar Pradesh, IN
Source
Journal of Biological Control, Vol 24, No 1 (2010), Pagination: 77-79Abstract
An experiment was conducted in R.B.D. with seven treatments in four replications with olitorius jute variety JRO524 for five consecutive years (2002-07) at the experimental farm of the Crop Research Station, Bahraich in a plot size of 3X5 m2 with a row spacing of 30 cm. Recommended doses of N:P:K @ 60:30:30 kg ha-1 were applied. The treatment with soil application of Trichoderma viride thrice, i.e., 7, 15, 30 DAS was found best in controlling seedling blight, collor rot, stem rot and ischolar_main rot diseases giving minimum per cent disease incidence (1.45, 3.07, 4.70 and 4.92, respectively) as compared to control (16.12, 9.47, 16.67 and 16.34, respectively). Soil application with T. viride twice (7 and 15 DAS) showed 2.05, 4.42, 6.14 and 6.15% incidence of the same diseases and ranked second. The treatment with carbendazim 50WP @ 2g kg−1, seed showed 8.52% seedling blight 5.24% collor rot, 6.93% stem rot and 8.56% ischolar_main rot incidence. Mean dry fibre yield was highest (25.70q ha−1) in the plots when the soil was treated with T. viride at 7, 15 and 30 DAS, while it was lowest in control (17.76q ha−1) and in carbendazim treatment it was 22.23q ha−1. Variation in yield was due to the variations in plant height and basal diameter.Keywords
Biological Management, Macrophomina phaseolina, Jute, Trichoderma viride.Full Text
- A Rapid in vivo Bioassay Method for Testing and Selection of Fungal Antagonists of Plant Pathogens
Abstract Views :223 |
PDF Views:122
Authors
Affiliations
1 Crop Research Station, Narendra Deva University of Agriculture and Technology, Bahraich 271 801, U. P., IN
2 Project Directorate of Biological Control (ICAR), P. B. No. 2491, H. A. Farm Post, Hebbal, Bangalore 560 024, Karnataka, IN
3 Department of Plant Pathology, Jawaharlal Nehru Krishi Vishwa Vidhyalaya, Jabalpur 482 004, M. P., IN
1 Crop Research Station, Narendra Deva University of Agriculture and Technology, Bahraich 271 801, U. P., IN
2 Project Directorate of Biological Control (ICAR), P. B. No. 2491, H. A. Farm Post, Hebbal, Bangalore 560 024, Karnataka, IN
3 Department of Plant Pathology, Jawaharlal Nehru Krishi Vishwa Vidhyalaya, Jabalpur 482 004, M. P., IN
Source
Journal of Biological Control, Vol 16, No 2 (2002), Pagination: 173-176Abstract
Eight Trichoderma isolates were tested for their bioefficacy against seed, ischolar_main and seedling rot incited by Rhizoctonia solani by adopting an in vivo test method (blotter test). Vigor index ranging from 169.5 to 2239.4 and disease incidence ranging between 10 to 86 percent were recorded in various treatments. All bioagents were graded based on disease grading key proposed for their rating. The clear differentiation of efficacy of various Trichoderma species against R. solani obtained with the in vivo bioefficacy test method adopted (blotter test) in the present study shows suitability of this method for routine screening of fungal biocontrol agents against seed and soil borne plant pathogens.Keywords
Fungal Antagonists, in vivo Bioassay, Plant Pathogens.Full Text