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- Studies on Comparative Efficacy of Commercially Available Talc Formulations of Trichoderma spp. and Fungicide against Root Rot of Chilli (Capsicum annuum L.)
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Authors
Affiliations
1 Krishi Vigyan Kendra, Bulandshahr (U.P.), IN
2 Krishi Vigyan Kendra, Rampur (U.P.), IN
3 Krishi Vigyan Kendra, Saharanpur (U.P.), IN
1 Krishi Vigyan Kendra, Bulandshahr (U.P.), IN
2 Krishi Vigyan Kendra, Rampur (U.P.), IN
3 Krishi Vigyan Kendra, Saharanpur (U.P.), IN
Source
International Journal of Plant Protection, Vol 9, No 2 (2016), Pagination: 540-546Abstract
Rhizoctonia solani causing ischolar_main and stem rot in young transplanted plants is a major soil borne pathogen of chilli (Capsicum annuum L.). Poor growth of affected plants, yellowing and drying of foliage accompanied with partially or fully damaged ischolar_main system are major symptoms of the disease. Studies were carried out to evaluate efficacy of soil application of ten commercially available formulations of Trichoderma harzianum and T. viride, under laboratory and field conditions for efficacy in suppressing Rhizoctonia ischolar_main rot and promoting plant growth in chilli. Soil drenching by carbendazim 75 per cent WP (0.2%) was also taken as standard chemical check. Except BF 10 and BF 5 all the formulations which were tested in the field experiment were effective in reducing Rhizoctonia rot incidence in chilli as compared to control. However, disease incidence was least (12%) for the BF4. Reduction in disease incidence in this treatment was comparable to soil drenching by carbendazim (12%). Among other treatments BF3 was second most effective bioagent against Rhizoctonia ischolar_main rot All the bioagents promoted plant growth in terms of plant height, ischolar_main length, shoot dry weight and ischolar_main dry weight. Maximum shoot dry weight was recorded for BF4 (60.5 g) followed by BF3 (60.00 g), BF6 (56.5 g) and BF2 (55.6 g). Similar trend of ischolar_main dry weight was recorded. Highest rhizosphere soil population was recorded in case of bioagent formulation BF4 (4.1x106 cfu/g soil) followed by BF3 (3.8x106 cfu/g soil) and BF6 (3.4x106 cfu/g soil).Keywords
Chilli, Biological Control, Rhizoctonia solani, Plant Growth.
References
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- Evaluation of Commercially Available Talc Formulations of Bioagents for Management of Sheath Blight of Rice and their Effect on Plant Growth Enhancement
Abstract Views :189 |
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Authors
Affiliations
1 Krishi Vigyan Kendra, Bulandshahr (U.P.), IN
2 Krishi Vigyan Kendra, Saharanpur (U.P.), IN
3 Krishi Vigyan Kendra, Moradabad (U.P.), IN
1 Krishi Vigyan Kendra, Bulandshahr (U.P.), IN
2 Krishi Vigyan Kendra, Saharanpur (U.P.), IN
3 Krishi Vigyan Kendra, Moradabad (U.P.), IN
Source
International Journal of Plant Protection, Vol 10, No 1 (2017), Pagination: 111-116Abstract
The effectiveness of commercially available talc formulations of Trichoderma harzianum and Pseudomonas fluorescens applications either alone or in combination on rice crop growth, sheath blight disease and grain yield was investigated in field experiments. Seed and soil application of T. harzianum and P. fluorescens resulted in significant reduction of sheath blight disease incidence caused by Rhizoctonia solani and was comparable to the treatment with a systemic fungicide carbendazim (seed and foliar application). Lowest sheath blight severity was recorded in the treatment comprising combined application of T. harzianum and P. fluorescens (9.50%) whereas, 10.6 per cent sheath blight severity was recorded in plot receiving seed and foliar application of carbendazim. Plots having seed and soil application of T. harzianum and P. fluorescens alone had 11.5 per cent and 11.8 per cent disease severity, respectively. Observations recorded at the time of disease incidence revealed that combined application of T. harzianum and P. fluorescens delayed disease incidence by 35 days which was maximum among all the treatments. Seed and foliar application of carbendazim also delayed disease incidence by 27 days which was significantly lower than combined application of T. harzianum and P. fluorescens. Observations on plant growth parameters revealed that plant growth was maximum in plots having combined application of T. harzianum and P. fluorescens, in this treatment higher plant height (112.0 cm), shoot dry weight (32.0 g), ischolar_main dry weight (7.9 g) were recorded. No significant increase in plant growth was recorded in plots receiving seed and foliar application of carbendazim. Studies on different treatments on yield attributes also established combined application of T. harzianum and P. fluorescens as the most effective treatment and resulted in 17.56 per cent increase in plant yield followed by T. harzianum (16.75%) and P. fluorescens (14.86%) alone, only 9.45 per cent increase in plant yield was recorded in plots having seed and foliar application of carbendazim.Keywords
Rice, Biological Control, Sheath Blight, Rhizoctonia solani, Plant Growth.References
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