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Naik, M. K.
- Evaluation of Biocontrol Efficacy of Trichoderma Isolates and Methods of its Application against Wilt of Chilli (Capsicum annuum L.) Caused by Fusarium solani (Mart) Sacc
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Authors
Affiliations
1 Department of Plant Pathology, University of Agricultural Sciences, College of Agriculture, Raichur 584101, Karnataka, IN
1 Department of Plant Pathology, University of Agricultural Sciences, College of Agriculture, Raichur 584101, Karnataka, IN
Source
Journal of Biological Control, Vol 23, No 1 (2009), Pagination: 31-36Abstract
Seven isolates of Trichoderma spp. were evaluated as bio-agents against chilli wilt caused by Fusarium solani in the laboratory as well as pot culture experiments. Among the Trichoderma isolates, T. viride PDBCTV I0 recorded 100.00 per cent inhibition of linear growth of F. solani under dual culture on potato dextrose agar regardless of whether the Trichoderma spp. were seeded at all same time, one day prior, or two days prior inoculation (DPI) with the pathogen. T. harzianum PDBCTH I0 recorded 100.00 percent inhibition only in the 2 DPI treatments. The antagonists were applied in three different ways with or without carrier for optimization of delivery system. Seven days prior application (DPA) of bio agents favored maximum proliferation of propagules of antagonist in the soil followed by simultaneous application of antagonist and test pathogen and 1east number of propagu1es of antagonists were recorded in application through seed treatment. Under pot conditions, T. harzianum PDBCTH 10 and T. viride (Indigenous) recorded maximum number of propagules in soil. Further, it reduced F. solani propagules up to 100.00 per cent at 60 days after application (DAA), indicating number of test pathogen came down to essentially '0'. However, T. viride PDBCTV I0, T. viride PDBCTC 23, T. viride PDBCTV 24, Trieco (T. viride) and T. harzianum PDBCTH 8 also reduced F. solani population from 10.61 x 103 cfu g-1 of soil to less than 2 x 103 cfu g-1 in 7 DPA treatment at 60 DAA.Keywords
Application Methods, Bio Agents, Dual Culture, Formulation, Fusarium solani, Trichoderma and Wilt.Full Text
References
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- Devika Rani, G. S. 2006. Towards promoting disease resistance and biological control of Fusarium wilt of chilli. M.Sc (Agri) Thesis. University of Agricultural Sciences, Dharwad. Devika Rani, G. S., Naik, M. K., Raju, K. and Prasad, P. S. 2007. Prevalence of wilt of chilli and assessment of population dynamics of Fusarium in predominant chilli (Capsicum annuum L.) growing regions of Karnataka. Journal of Soil Biology and Ecology, 27: 50-61.
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- Naik, M. K., Singh, S. J. and Sinha, P. 2000. Mechanism of biocontrol of wilt of chilli caused by Fusarium oxysporum f. sp. capsici. Proceedings, Golden Jubilee International Conference on Integrated Plant Disease Management for Sustainable Agriculture. Vol. 1: 401-402. Indian Phytopathological Society, Indian Agricultural Research Institute, New Delhi, 665p.
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- Singh H. B. 2006. Trichoderma: A boon for biopesticides industry. Journal of Mycology and Plant Pathology, 36: 373-384.
- Sivan, A. and Chet, I. 1986. Biological control of Fusarium species in cotton, wheat and muskmelon by Trichoderma harzianum. Phytopathology. 116: 39-47.
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- Study of Different Temperature Levels on Radial Growth and Dry Mycelial Weight of Trichoderma Spp. Isolated from Red Gram Based Conservation Agriculture Ecosystem
Abstract Views :237 |
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Authors
Affiliations
1 Department of Plant Pathology, University of Agricultural Sciences, Rachipur (karnataka), IN
2 Department of Genetics and Plant Breeding, College of Agriculture, Bheemarayanagudi, Gulbarga (karnataka), IN
1 Department of Plant Pathology, University of Agricultural Sciences, Rachipur (karnataka), IN
2 Department of Genetics and Plant Breeding, College of Agriculture, Bheemarayanagudi, Gulbarga (karnataka), IN
Source
International Journal of Plant Protection, Vol 7, No 2 (2014), Pagination: 424-428Abstract
Different temperatures and pH were taken to observe the radial growth and dry mycelial weight of Trichoderma spp. The radial growth of Trichoderma was maximum for all the four species i.e., T. harzianum, T. viride, T. hamatum and T. virens (90, 82, 91.3 and 85mm) at 30oC, where it was minimum in four species at 40oC (30.70, 35, 22.53 and 20 mm), respectively and dry mycelium of T. harzianum (1.05 mg), T. viride (1.83 mg), T. hamatum (2.42 mg) and T. virens (0.82 mg) were maximum at 25oC whereas, the radial growth of four isolates were maximum at pH 6 (90, 88, 92 and 91mm) in T. harzianum, T. viride, T. hamatum and T. virens, respectively. At neutral pH, radial growth of T. harzianum (89 mm), T. viride (91 mm), T. hamatum (89 mm) and T. virens (87 mm) was minimum and dry mycelium weight of T. harzianum (729 mg), T. viride (1639.67 mg), T. hamatum (798 mg) and T. virens (583.67 mg) were maximum at pH 8. It was minimum at pH 4 for T. harzianum (120 mg), T. viride (257 mg), T. hamatum (154 mg) and T. virens (262.67 mg).Keywords
Trichoderma Spp., Radial Growth, Dry Mycelia, Temperature
- Estimation of Yield Loss in Sunflower Due to New Sunflower Leaf Curl Virus Disease at Different Stages of Crop Growth
Abstract Views :198 |
PDF Views:1
Authors
Affiliations
1 Department of Plant Pathology, University of Agricultural Sciences, RAICHUR (KARNATAKA), IN
2 Department of Plant Pathology, University of Agricultural Sciences, DHARWAD (KARNATAKA), IN
1 Department of Plant Pathology, University of Agricultural Sciences, RAICHUR (KARNATAKA), IN
2 Department of Plant Pathology, University of Agricultural Sciences, DHARWAD (KARNATAKA), IN
Source
International Journal of Plant Protection, Vol 8, No 1 (2015), Pagination: 138-141Abstract
An experiment was carried out to assess the crop loss due to sunflower leaf curl virus (SuLCV) disease. The crop loss assessment in terms of growth and yield components was recorded at first appearance of symptoms of SuLCV at 30 days to 90 days during the crop growth. The SuLCV disease infection in sunflower significantly affected the plant height (72.60 to 157cm), size of the head (8.60 to 18.78cm), 100 seed weight (2.20 to 6.32g), oil content (31.24% to 38.26%), and weight of seeds/10 heads (77.20 to 372.2g) as compared to the healthy control plants. In the plants, first appearance of symptoms at 30 DAS was recorded the seed yield loss of 79.25 per cent.Keywords
Sunflower, SuLCV, Yield Loss Estimation, Yield Components.- Screening of Trichoderma Species against Major Soil Borne Fungal Pathogens
Abstract Views :281 |
PDF Views:159
Authors
Affiliations
1 Department of Seed Science and Technology, University of Agricultural Sciences, Raichur-584 102, IN
1 Department of Seed Science and Technology, University of Agricultural Sciences, Raichur-584 102, IN
Source
Journal of Biological Control, Vol 29, No 3 (2015), Pagination: 145-147Abstract
The antagonistic potential of forty four isolates of Trichoderma were evaluated in vitro against the most widely occurring soil borne plant pathogens viz., Macrophomina phaseolina, Rhizoctonia solani, Rhizoctonia bataticola and Sclerotium rolfsii to identify the most potential Trichoderma isolate. Maximum growth inhibition of M. phaseolina (81.11 %), R. solani (82.59 %) and S. rolfsii (76.67 %) was recorded by T. hamatum where as T. virens was most aggressive against R. bataticola (68.15 %) in dual culture technique.Keywords
Trichoderma, Rhizoctonia bataticola, Macrophomina phaseolina, Rhizoctonia solani, Sclerotium rolfsii, Biological Control.Full Text
- Evaluation of Fungicides, Botanicals and Bio-Agents against Sheath Blight of Rice Caused by Rhizoctonia solani Kuhn under Irrigated Eco-System
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Authors
P. Nagaraju
1,
M. K. Naik
2
Affiliations
1 Department of Plant Pathology, AICRP on Groundnut, University of Agricultural Sciences, Dharwad (Karnataka), IN
2 Department of Plant Pathology, University of Agricultural Sciences, Raichur (Karnataka), IN
1 Department of Plant Pathology, AICRP on Groundnut, University of Agricultural Sciences, Dharwad (Karnataka), IN
2 Department of Plant Pathology, University of Agricultural Sciences, Raichur (Karnataka), IN
Source
International Journal of Plant Protection, Vol 10, No 2 (2017), Pagination: 247-251Abstract
The study was conducted to know the field efficacy of different fungicides, botanicals and bio-agents against sheath blight of rice under irrigated eco-system. Among the different treatments, the least per cent disease index (17.00 PDI) was recorded in Hexaconazole (Contaf 5 EC) with the highest grain yield (81.02 q/ha). This was followed by Validamycin 3L (21.60 PDI and grain yield 73.83 q/ha) and Carbendazim 50 WP (24.80 PDI and grain yield 69.21 q/ha). Among the botanicals and bio-agents, the least disease incidence was noticed in Tricure (Azadirachtin @ 0.03%) with 30.50 PDI and grain yield of 61.43 q per ha and P. fluorescens (Pfr-l) with 36.20 PDI with a grain yield of 54.02 q per ha. The C:B ratio was high in Hexaconazole (1:2.5) followed by Propiconazole (1:2.3).Keywords
Sheath Blight, Rice, Rhizoctonia solani, Hexaconazole, Botanicals, Bio-Agents.References
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- On Some Megainvertebrate (Mollusca, Echinodermata and Brachiopoda) Fossils from Bagh Beds, Madhya Pradesh
Abstract Views :231 |
PDF Views:110
Authors
Affiliations
1 Zoological Survey of India, M-Block, New Alipore, Kolkata-700053, IN
1 Zoological Survey of India, M-Block, New Alipore, Kolkata-700053, IN
Source
Records of the Zoological Survey of India - A Journal of Indian Zoology, Vol 113, No 3 (2013), Pagination: 137-144Abstract
Marine Cretaceous deposits have been recorded in large part of the Extra-peninsular belt of the Indian Subcontinent. A condensed sequence form of this type of deposit has also been recognised in the Narmada Valley of Central India. Less thick marine Cretaceous deposits came up in the vicinity of Bagh, a township in Dhar District of Madhya Pradesh, on the western portion of the Narmada Valley.Full Text
- Influence of Nitrogenous Fertilizer Levels, Planting Density and IDM on Severity of Sheath Blight of Rice Caused by Rhizoctonia solani Kuhn in Northern Karnataka
Abstract Views :260 |
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Authors
P. Nagaraju
1,
M. K. Naik
2
Affiliations
1 AICRP on Groundnut, University of Agricultural Sciences, Dharwad (Karnataka), IN
2 Department of Plant Pathology, University of Agricultural Sciences, Raichur (Karnataka), IN
1 AICRP on Groundnut, University of Agricultural Sciences, Dharwad (Karnataka), IN
2 Department of Plant Pathology, University of Agricultural Sciences, Raichur (Karnataka), IN
Source
International Journal of Plant Sciences, Vol 13, No 1 (2018), Pagination: 7-11Abstract
The study was conducted to know the influence of nitrogenous fertilizer levels, planting density and integrated disease management (IDM) on the severity of sheath blight of rice in northern Karnataka. The results indicated that, application of 200 kg N per ha recorded higher per cent disease index (PDI) of 40.37 per cent. However, increased N application from 100 kg N to 350 kg N per ha resulted in increased PDI from 17.04 to 62.60%, respectively. Minimum PDI (23.33%) and higher grain yield (67.80 q/ha) were recorded at 150 kg N per ha which is the recommended N dosage in Thunga Bhadra Project command area of Karnataka state. Among different planting densities, the system of rice intensification (SRI) method (16 hills/m2) recorded least PDI (5.00%) and highest grain yield (67.16 q/ha) whereas increased planting density from 20 to 70 hills per m2 resulted in higher PDI from 6.86 to 45.18 per cent, respectively. However, at 50 hills per m2, 16.12 PDI was recorded with a grain yield of 60.53 q per ha which is the recommended planting density. In the integrated disease management (IDM) trial, wherein, use of cultivar, IR-64 (moderately resistant variety) with foliar application of fungicide hexaconazole (@0.1%) resulted in minimum PDI of 21.26% with higher grain yield of 71.74 q per ha as against 34.73 PDI and 56.87 q per ha grain yield in Samba mahsuri (susceptible variety).Keywords
Nitrogen Fertilizer, Planting Density, IDM, Sheath Blight, Rice.References
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