Record Details

ECOFRIENDLY MANAGEMENT OF BELL PEPPER DISEASES UNDER PROTECTED CULTIVATION

KrishiKosh

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Title ECOFRIENDLY MANAGEMENT OF BELL PEPPER DISEASES UNDER PROTECTED CULTIVATION
 
Creator ASHLESHA
 
Contributor Paul, Y.S.
 
Subject ##Unable to generate tags tnjvas_i(52-53)_feb&apr 2005.pdf
Plant diseases
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Bell pepper
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Plant pathology
 
Description Doctoral Dissertation
Present investigations on diseases of bell pepper under protected cultivation were undertaken to study the progress of diseases, environmental factors affecting diseases, evaluation of various organic inputs against pathogens of bell pepper and to work out suitable ecofriendly management strategies. Survey of bell pepper growing polyhouses was conducted in six districts of Himachal Pradesh namely Kangra, Hamirpur, Bilaspur, Una, Kullu and Mandi. Maximum incidence of bacterial wilt was observed in Zmanabad (83.3%) and Sai (70.5%) areas of Kangra, whereas severity of powdery mildew was maximum in Katrain (34.6%) area of Kullu. There was a positive significant correlation between disease severity of powdery mildew and bacterial wilt and maximum daily temperature. Organic inputs viz., cow urine and panchgavya provided 100% inhibition of all the fungal pathogens followed by vermiwash (90.6-100.0%) at 10% concentration in vitro. Biodynamic compost tea and biosol caused 95.6 and 92.3% inhibition of bacterium (Ralstonia solanacearum) at 4% concentration. Seedling dip in Orguard (a new formulation) for 1 hour increased the survivability of seedlings upto 27 days in comparison to check. Organic inputs showed the presence of total 92 isolates, but only 12 isolates which were the species of Bacillus, Pseudomonas, Serratia and Actinomycetes exhibited strong antifungal properties against capsicum pathogens. Based on in vitro evaluation, three isolates of Bacillus (AB8B2, AP13B4 and AM15B5), one each of Serratia (AP18S) and Actinomycetes (AV10A2) showed strong antifungal activity against pathogens of capsicum. All the species of Bacillus were found most inhibitory to Sclerotinia sclerotiorum (99.7%) followed by Fusarium oxysporum and Fusarium solani (92.0–97.0%). The antagonistic isolates also exhibited plant growth promoting traits. Among these, six isolates were selected as efficient phosphate solubilizers and maximum solubilization was shown by AB8B2 (365.2 μg P/ml). All the isolates showed IAA production and nitrogenase enzyme activity and six isolates produced siderophores. Cow urine distillates of five botanicals viz, Ranunculus muricatus, Melia azedarach, Vitex negundo, Eupatorium sp and Murraya koenigii were evaluated against test pathogens. Out of these, distillates of V. negundo and M. koenigii provided 100% inhibition of all the test pathogens at 10% concentration. Organic inputs found effective under in vitro conditions were tested in farmers‟ polyhouses at three locations in Kangra. Drench of Orguard before transplanting and at 15 days interval provided more than 85.0% control of bacterial wilt. Spray of milk along with sulphur and asafoetida resulted in more than 80.0% control of powdery mildew of capsicum under protected cultivation.
 
Date 2016-08-05T15:25:39Z
2016-08-05T15:25:39Z
2012
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/71115
 
Language en
 
Format application/pdf
 
Publisher CSK Himachal Pradesh Krishi Vishavavidyalaya, Palampur