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Sarma, Y. R.
- Effect of Organic Amendments on the Proliferation Stability of Trichoderma harzianum and Suppression of Phytophthora meadii in Cardamom Soils in Relation to Soil Microflora
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PDF Views:126
Authors
Affiliations
1 Division of Crop Protection, Indian Institute of spices Research, P. B. No.1701, Marikunnu P O., Calicut 673 012, Kerala, IN
1 Division of Crop Protection, Indian Institute of spices Research, P. B. No.1701, Marikunnu P O., Calicut 673 012, Kerala, IN
Source
Journal of Biological Control, Vol 23, No 2 (2009), Pagination: 163-167Abstract
An even economical and more frequently used method of attaining biological control of soil borne plant pathogens is incorporating plant residues and organic amendments to the soil, which support high level of microbial activity. In the present study farm yard manure (FYM), poultry manure (PM), coffee husk (CH) and neem cake (NC) were used as soil amendments with or without Trichoderma harzianum to evaluate their efficacy in suppressing Phytophthora meadii under varying moisture conditions. The survival of Phytophthora was found higher at 50% moisture level. Neem cake with Trichoderma appeared as a suitable amendment at all moisture level and has shown 69% reduction in Phytophthora infection over control. At 75% and 100% (field capacity), no detectable level of Phytophthora was observed in treatments where T. harzianum was fortified with CH, PM and NC. At field capacity, PM and FYM with Trichoderma also reduced the build up of Phytophthora. Native population of Trichoderma was found negligible in non-amended treatments. All the four amendments maintained the population and supported the growth of Trichoderma at all moisture levels. In general, organic manures with T. harzianum reduced the population level of other fungi, while crop residues supported the growth of fungi like Penicillium, Rhizopus, Aspergillus, Mucor, etc. besides T. harzianum.Keywords
Coffee Husk, Crop Residue, Elettaria cardamomum, Farm Yard Manure, Neem Cake, Organic Amendments, Phytophthora meadii, Poultry Manure and Trichoderma harzianum.Full Text
References
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- Rhizospheric Pseudomonas fluorescens as Rejuvenating and Root Proliferating Agents in Black Pepper
Abstract Views :233 |
PDF Views:124
Authors
Affiliations
1 Microbiology Group, M. S. Swaminathan Research Foundation, Taramani Institutional Area, CPT Campus, Chennai, 600113, IN
2 Indian Institute of Spices Research (ICAR), Marikkunnu P. O., Calicut, Kerala, 673 012, IN
1 Microbiology Group, M. S. Swaminathan Research Foundation, Taramani Institutional Area, CPT Campus, Chennai, 600113, IN
2 Indian Institute of Spices Research (ICAR), Marikkunnu P. O., Calicut, Kerala, 673 012, IN
Source
Journal of Biological Control, Vol 19, No 2 (2005), Pagination: 173-178Abstract
Six strains of Pseudomonas fluorescens, which had been found efficient in ischolar_main-rot suppression in black pepper (Piper nigrum L.) caused by Phytophthora capsici were tested for their ability in rejuvenating Phytophthora infected black pepper cuttings. Among the treatments, which had only bacterial application, IISR-6 ensured survival of 67% of the infected cuttings where as only 22% of the untreated plants survived 3 months after treatment, The combined application of IISR-51, IISR-6+IISR-13 and I1SR-51+IISR-11 with Metalaxyl-Mancozeb resulted in 100% survival of the infected plants, showing an additive effect. Experiments conducted for ischolar_main-proliferation activity of the P. fluorescens showed that the bacterial strains helped increase the ischolar_main biomass of the plants (30-135%). All the strains increased the ischolar_main length and ischolar_main area in the treated plants (12-127%, 43-200%, respectively). Strains were also found to produce plant growth hormones, viz. IAA&GA.Keywords
Black Pepper, Root-Rot, Phytophthora capsici, Pseudomonas fluorescens, Rejuvenation, Root Proliferation.Full Text