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Gopalakrishnan, C.
- Management of Okra Powdery Mildew Using Ampelomyces quisqualis
Abstract Views :232 |
PDF Views:124
Authors
Affiliations
1 Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu, IN
1 Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu, IN
Source
Journal of Biological Control, Vol 23, No 3 (2009), Pagination: 325-327Abstract
The fungus Ampelomyces quisqualis is a naturally occurring hyperparasite of powdery mildews. Stanes Bio-Dewcon is a talc- based biological fungicide that contains the spores and mycelial fragments (1 x 108 CFUs g-1) of A. quisqualis. Bio-Dewcon at three different concentrations, viz., 2.0, 2.5 and 3.0kg ha-1 significantly reduced the okra powdery mildew incidence. The product was applied to plants as preventive spray at 30 and 45 days after sowing. Among the three doses tested, 3.0kg ha-1 was found to be on par with wettable sulphur (0.4%). Even though both Bio-Dewcon and wettable sulphur were found to be equally effective in controlling powdery mildew, Bio-Dewcon may be preferred due to its non-residual and odourless properties, especially in vegetables.Keywords
Ampelomyces quisqualis, Bio-Dewcon, Foliar Spray, Okra and Powdery Mildew.Full Text
References
- Falk, S. P., Gadoury, D. M., Cortesi, P., Pearson, R. C. and Seem, R. C. 1995a. Parasitism of Uncinula necator cleistothecia by the mycoparasite Ampelomyces quisqualis. Phytopathology, 85: 794–800.
- Falk, S. P., Gadoury, D. M., Pearson, R. C. and Seem. R. C. 1995b. Partial control of grape powdery mildew by the mycoparasite Ampelomyces quisqualis. Plant Disease, 79: 483–490.
- Paulitz, T. C. 2001. Biological control in green house systems. Annual Review of Phytopathology, 39: 103–133.
- Singh, N. B., Sharma, H. K. and Srivastava, K. J. 1998. Chemical control of powdery mildew in okra seed crop. National horticultural Research and Development Foundation Newsletter, 18: 1–4.
- Seed-Borne Biocontrol Agents for the Management of Rice Sheath Rot Caused by Sarocladium oryzae (Sawada) W. Gams & D. Hawksw
Abstract Views :205 |
PDF Views:120
Authors
Affiliations
1 Department of Plant Pathology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore 641 003, Tamil Nadu, IN
1 Department of Plant Pathology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore 641 003, Tamil Nadu, IN
Source
Journal of Biological Control, Vol 20, No 2 (2006), Pagination: 197-204Abstract
All the antagonist isolates obtained from rice seeds showed in vitro inhibitory effect on Sarocladium oryzae ranging from 10.90 to 82.18 per cent. Bacillus subtilis isolate 9 was found to be highly effective in inhibiting the mycelial growth of S. oryzae by 82.18 per cent. The biocontrol agents significantly reduced S. oryzae seed infection and increased seed germination and seedling vigour. Field trials conducted at four different locations indicated that the seed-borne S. oryzae in rice could be successfully managed by seed treatment followed by foliar application at boot leaf stage with B. subtilis (or) P. fluorescens.Keywords
Biocontrol Agents, Mycelial Growth, Rice Seeds, Sarocladium oryzae, Sheath Rot.Full Text
- Screening and Selection of Potential Trichoderma Isolates for the Control of Cotton Seed Rot and Damping-off
Abstract Views :198 |
PDF Views:103
Authors
Affiliations
1 Project Directorate of Biological Control (ICAR) P.B. No. 2491, H.A. Farm Post, Bellary Road Bangalore 560024, Karnataka, IN
1 Project Directorate of Biological Control (ICAR) P.B. No. 2491, H.A. Farm Post, Bellary Road Bangalore 560024, Karnataka, IN
Source
Journal of Biological Control, Vol 17, No 2 (2003), Pagination: 161-165Abstract
Out of twelve Trichoderma isolates tested, cotton isolate T. viride (97) exhibited the fastest growth rate and strong antagonism against Rhizoctonia solani in vitro recording 56.2 per cent inhibition in dual culture. All the isolates tested enhanced cotton seed germination when treated with mycelial suspensions of bioagents in vivo. The disease incidence in bioagent treatments ranged between 14.8 to 32.4 per cent, while pathogen treatment recorded 82 per cent. Three isolates have recorded seedling vigour index above 2000, which was much better than fungicide treatment (1471) in blotter tests (Roll Towel Method). T. viride (32) recorded the maximum seed germination (86.4 per cent) and no incidence of post -emergence mortality under green house conditions. The seedling vigour index in bioagent treatments ranged between 1004 and 1866.Keywords
Biocontrol, Cotton, Damping-off, Rhizoctonia solani, Trichoderma.Full Text
- Use of Brewery Waste Amended Spent Malt as Substrate for Mass Production of Trichoderma
Abstract Views :214 |
PDF Views:116
Authors
Affiliations
1 Project Directorate of Biological Control (ICAR) P.B. No. 2491, H.A. Farm Post, Bellary Road Bangalore 560024, Karnataka, IN
1 Project Directorate of Biological Control (ICAR) P.B. No. 2491, H.A. Farm Post, Bellary Road Bangalore 560024, Karnataka, IN
Source
Journal of Biological Control, Vol 17, No 2 (2003), Pagination: 167-170Abstract
Among four different levels of brewers' yeast tested, 3g/100 g of spent malt was found to be optimum for the growth of Trichoderma harzianum in solid-state fermentation. Spent malt brewers' yeast medium supported all the species namely, T. harzianum, T. viride and T. virens. T. harzianum recorded the highest number of viable propagules after twelve days of incubation. All the treatments recorded more number of viable propagules after twelve days of incubation than after seven days of incubation.Keywords
Brewers' Yeast, Solid State, Spent Malt, Trichoderma harzianum.Full Text
- Studies on the Dose-Mortality Relationship Between the Entomofungal Pathogen Beauveria bassiana (Bals.) Vuillemin and Heliothis armigera Hubner (Lepidoptera: Noctuidae)
Abstract Views :198 |
PDF Views:120
Authors
Affiliations
1 Division of Entomology and Nematology, Indian Institute of Horticultural Research (ICAR) Bangalore-560 089, IN
1 Division of Entomology and Nematology, Indian Institute of Horticultural Research (ICAR) Bangalore-560 089, IN
Source
Journal of Biological Control, Vol 4, No 2 (1990), Pagination: 112-115Abstract
Beauveria bassiana (Bals.) Vuillemin was pathogenic to all the stages of Heliothis armigera Hubner Inflicting 60-100 and 100% mortality respectively, to the larval Instars I-V and the eggs at 1.0 × 107 conidia/ml. Pupal mortality was 60% at 1.0 × 109 conldla/ml and 80% mortality was observed in the prepupae and thc adults at 1.0 × 1010 conldla/ml with an incubation period ranging from 2-14 days.Keywords
Beauveria bassiana, Heliothis armigera, Dose-Mortality Relationship.Full Text
- Epizootiology of Nomuraea rileyi (Farlow) Samson in Field Populations of Helicoverpa (=Heliothis) armigera (Hubner) in Relation to Three Host Plants
Abstract Views :196 |
PDF Views:112
Authors
Affiliations
1 Division of Entomology and Nematology, Indian Institute of Horticultural Research, Bangalore 560 089, IN
2 Biological Control Centre, National Centre for Integrated Pest Management, Bellary Road, H.A Farm Post, Bangalore -560 024, IN
1 Division of Entomology and Nematology, Indian Institute of Horticultural Research, Bangalore 560 089, IN
2 Biological Control Centre, National Centre for Integrated Pest Management, Bellary Road, H.A Farm Post, Bangalore -560 024, IN
Source
Journal of Biological Control, Vol 3, No 1 (1989), Pagination: 50-52Abstract
Epizootlological studies of Nomuraea rileyi in field population of Helicoverpa (=Heliothis) armigera occurring on tomato, field beans and vegetable pigeonpea, grown under uniform field conditions, showed higher rates of fungal infection in H. armigera found on vegetable pigeonpea (37%) than on field beans (28.2%) and tomato (20.5%). Further, H. armigera larvae collected from these host plants and reared on the respective host plants under laboratory conditions also revealed the same trend.Keywords
Nomuraea rileyi, Helicoverpa armigera, Epizootiology.Full Text
- Effect of TNAU-Pf1 Seed Biopriming and Foliar Spray of Newer Fungicides on the Incidence of Leaf Blight of Sunflower
Abstract Views :296 |
PDF Views:149
Authors
Affiliations
1 Plant Pathology, TNAU, Coimbatore – 3, Tamil Nadu, IN
2 Agronomy, TNAU, Coimbatore - 3, Tamil Nadu, IN
3 PBG, TNAU, Coimbatore - 3, Tamil Nadu, IN
4 Department of Oilseeds, TNAU, Coimbatore - 3, Tamil Nadu, IN
1 Plant Pathology, TNAU, Coimbatore – 3, Tamil Nadu, IN
2 Agronomy, TNAU, Coimbatore - 3, Tamil Nadu, IN
3 PBG, TNAU, Coimbatore - 3, Tamil Nadu, IN
4 Department of Oilseeds, TNAU, Coimbatore - 3, Tamil Nadu, IN
Source
Journal of Biological Control, Vol 31, No 2 (2017), Pagination: 114-118Abstract
Seed biopriming followed by foliar spray of different newer fungicide molecules to manage sunflower leaf spot under field conditions have been tried in Coimbatore, Tamil Nadu, India for three consecutive years (2014-2016). The result indicated that among the different treatments tested, seed biopriming with TNAU Pseudomonas fluorescens (Pf1) @ 10g/kg seeds followed by spray of Hexaconazole @ 0.1% at 45 days and P. fluorescens (Pf1) @ 1.0% at 60 DAS showed less severity of Alternaria leaf spot (25.7) with the highest yield of 1471kg/ha against the control (47.7) which recorded yield of 1111kg/ha. In addition, seed biopriming promoted higher and uniform seed germination under field conditions.Keywords
Newer Molecule, Leaf Spot/Blight, Seed Biopriming, Seed Yield, Sunflower.Full Text
References
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