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Characterization and Bio-Control of Fruit and Root Rot Pathogens of Bell Pepper

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Author

Tariq, Aliya

Program

PhD

Institute

Pir Mehr Ali Shah Arid Agriculture University

City

Rawalpindi

Province

Punjab

Country

Pakistan

Thesis Completing Year

2020

Thesis Completion Status

Completed

Subject

Plant Pathology

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/14339/1/Aliya%20Tariq_Plant%20Pathology_2020%20arid%20rwp%20prr.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676725672524

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Bell pepper (Capsicum annuum L.) belongs to family ‘Solanaceae’ is among the most popular and highly profitable vegetable throughout the world. Among various biotic constraints fruit and root rot fungal pathogens contribute the most in reducing the bell pepper produce qualitatively and quantitatively throughout the worldwide including Pakistan. No detailed studies prior to this work have been conducted in Pothohar plateau, Punjab, Pakistan. Consequently, there was a dire need to conduct a comprehensive study for documenting prevalence and incidence of fruit and root rot diseases. Moreover, fungicides are being used extensively against the disastrous fruit and root rot pathogens. These fungicides not only contaminate the environment but also are health risk for human beings. During 2015-16 and 2016-17 bell pepper cropping season, extensive surveys were conducted in 9 tehsils/territory of Attock, Chakwal, Jhelum, Rawalpindi and Islamabad territory. A total of 8 greenhouses and 45 farmer’s fields/low plastic tunnels were visited at seedling and maturity stage to document fungal pathogen associated with fruit and root rot of bell pepper and their incidence. The survey revealed four pathogens viz. Colletotrichum, Fusarium, Botrytis, and Alternaria were found responsible for fruit rot in bell pepper. In greenhouse, Botrytis was mainly found associated with fruit rot with 15.13 percent fruit rot incidence (%FRI) followed by Fusarium (13.63%) and Alternaria (9.69%). In open fields the Colletotrichum (20.73%) was mainly found associated with fruit rot, followed by Fusarium (12.04%), Alternaria (8.92%) and Botrytis (6.73%). Three pathogens viz. Fusarium, Rhizoctonia and Sclerotium were found associated with root rot. At seedling stage, the mean incidence of Rhizoctonia was the maximum (19.25%) followed by Fusarium (15.63%) and Sclerotium (4.63%) root rot. In low plastic tunnels, the overall incidence of Fusarium was the maximum (15.98%) followed by Rhizoctonia (14.1%) and Sclerotium (7.38%) root rot. At maturity stage in greenhouses, the incidence of Fusarium was the maximum (9.25%) followed by Rhizoctonia (6.22%) and Sclerotium (4.94%) root rot. However, in open fields, the incidence of Sclerotium was the maximum (14.35%) followed by Fusarium (8.31%) and Rhizoctonia (6.15%) root rot. Analysis of fruit and root rot samples employing morphological characterization, showed prevalence of 8 fungal species (Colletotrichum truncatum, Fusarium incarnatum, Fusarium proliferatum, Botrytis cinerea, Alternaria alternata, Fusarium equiseti, Rhizoctonia solani and Sclerotium rolfsii) belonging to 6 genera. Phylogenetic analysis showed the genetic homology of the subject isolates with previously submitted isolates in GenBank, confirming the morphological characterization. Highly virulent isolates of the most prevalent pathogen from fruit (C. truncatum isolate ACT12) and root (F. equiseti isolate FJH15) established during the pathogenicity test were selected for in vitro bio-control trials. Among natural compounds, chitosan was found the most effective with 55.55% radial mycelial growth inhibition at 2.5% concentration followed by salicylic acid (53.33%) and calcium chloride (27.77%). All the tested volatiles completely inhibited the radial mycelial growth at 100 ppm. Out of three Trichoderma species, T. harzianum was found the most effective with the maximum percent RMGI of 56.1%, followed by T. viride (53.5%) and T. hamatum (48.7%). The present study documents the fruit and root rot pathogens in Pothohar Plateau, Punjab, Pakistan. The morpho-molecular characterization further identifies pathogens up to specie level. The exploration of bio-control strategies in vitro will help to develop effective management under field conditions.
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مولانا محمد زکریا سہارنپوری

مولانا محمد زکریا محدث سہارنپوری
یکم شعبان ۱۴۰۲؁ھ کو حضرت مولانا محمد زکریا محدث سہارنپوری کا وصال ستاسی سال کی عمر میں مدینہ منورہ میں ہوگیا، جہاں شیدائیوں اور فدائیوں کے بے پناہ ہجوم نے ان کے جنازہ کی نماز پڑھی اور اسی مقدس سرزمین میں سپردخاک کئے گئے، جس کی آرزو زندگی بھر فرماتے رہے۔
وہ چودہویں صدی ہجری میں علمائے سلف کی ایک بے مثال یادگار تھے، ان کی تدفین کے ساتھ اسلام کے اس دور کی ایک بے قرار عبقریت کی نظر حکیمانہ، اسرار محرمانہ، جذب عارفانہ اور پھر دینی علوم کی پشتینبانی، عالی استعداد کی جلوہ سامانی، تحریر کی صاعقہ پاشی اور قلم کی برق دستی بھی تہ خاک ہوگئی، اب جب وہ آغوش رحمت الٰہی میں ہیں، ان کو ان کے معتقدین، ملک العلماء، سلطان الفضلاء، منہاج المتقین، مہبط الانوار اور شمس الفقراء کی حیثیت سے یاد کرکے ان کی دائمی جدائی پر آنسو بہائیں گے، ان کے جلوہ صدرنگ پر آئندہ بہت کچھ لکھا جائے گا، وہ دینی اور روحانی علوم کے دریا میں کبھی مثل موج ابھر کر کبھی اس کے ساحل سے گزر کر کبھی اس کے سینے میں اتر کر ان کے رازکو جس طرح فاش تر کرتے رہے، اس پر معلوم نہیں کیا کچھ قلم بند ہوتا رہے گا، انھوں نے خدا جانے کتنے اوراق پر اسرار الٰہی کے حقائق اور انوار الٰہی کے دقائق کو آشکار کیا، ان کی ان گنت تصانیف کی روحانی، مذہبی، نظری، فکری، اخلاقی اور دعوتی تعلیمات سے برابر عبرت و بصیرت کے درس حاصل ہوتے رہیں گے۔
تعلیم مظاہر العلوم سہارنپور میں پائی اور وہیں ایک عرصہ تک درس و تدریس کا سلسلہ جاری رکھا، اپنے والد بزرگوار سے مجتہدانہ دماغ پایا تھا، اسی لئے طالب علمی ہی کے زمانے سے قرآن مجید حدیث مقدس اور فقہ کا مجتہدانہ مطالعہ...

A Proposed Islamic Microfinance Impact Assessment Methodology

Impact assessment of microfinance programs have been remained the foremost concern of microfinance stakeholders for optimal policy measures. The existing literature regarding the impact assessment varies from parametric to experimental methods to evaluate the performance of microfinance programs across the world however; the literature is lacking a single measure to reveal maximum possible changes in socioeconomic variables resulting from microfinance institutions’ intervention. This study aims to develop a composite index for evaluating the performance of microfinance programs in multi-dimensional contexts. The study exposes a set of eight “diverse indicators” to evaluate the performance of a microfinance program on a wider socioeconomic scale. The dimensions of the index are consist of economic (Income, saving) and socioeconomic (poverty, access to basic facilities, family empowerment) indicators. The changes in deprivations of household, based on the selected indicators, reveal the intensity of success of a microfinance program towards their goals. Finally, we have developed an index by the interaction of incidence and intensity of socioeconomic deprivations. The index is named as “Multidimensional Microfinance Deprivation Index”. This is an index developed in the same line as multidimensional poverty index. The implications of this study are three folds; firstly, it will open up a new dimension of literature in the field of microfinance including Islamic microfinance by instigating an important area. Secondly, it may provide a better alternative to microfinance’s stakeholders to investigate the impact assessment of microfinance programs on a wider socioeconomic scale rather than a few economic. Last but not the least, the study integrates diverse socioeconomic indicators, after assigning weights and adjustment to portray an overall picture of the performance of microfinance in terms of uplifting the socioeconomic conditions of the poor and financially marginalized people.

Catalytic Oxidation and Degradation of Organic Compounds Using Supported Transition Metals/Metal Oxides.

0.1 wt % Palladium/ZrO 2, Manganese oxide and cobalt oxide were synthesized in our laboratory. Zirconia was prepared in the laboratory by precipitation of zirconyl chloride with ammonium hydroxide. Pd/ZrO 2 was prepared by incipient wetness impregnation technique. Cobalt oxide was prepared by solid state mixing of cobalt nitrate and ammonium bicarbonate in an agate mortar at room temperature. Manganese oxide was also prepared by mechanochemical addition of potassium permanganate and Ammonium bicarbonate in a molar ratio of 2:3 respectively. The prepared catalysts were characterized by several physical/analytical methods that include nitrogen adsorption studies (Surface area and Pore Size Analysis), X-Ray Diffractometery, Fourier Transform Infra Red spectroscopy, particle size and Scanning Electron Microscope analysis. Pd/ZrO 2 was tested for the solvent free oxidation of benzyl alcohol and Toluene respectively. The reactions were carried out in liquid phase under mild conditions of temperature and pressure. Molecular oxygen was used as oxidant. The oxidation of BzOH was > 70 % selective towards benzaldehyde formation with a TOF>6000 per hour. Kinetic study showed that Langmuir Hinshelwood (L-H) mechanism was found to be followed when the experimental data was applied to the L-H equation. The oxidation of toluene was more selective towards benzyl alcohol formation in lower reaction temperature regime; however as the reaction temperature was increased the reaction became more selective towards benzoic acid. The main oxidation products were benzyl alcohol, benzaldehyde and benzoic acid however the main product was benzoic acid. Manganese oxide was prepared by solid state mechanochemical addition of potassium permanganate and Ammonium bicarbonate. The synthesized manganese oxide powder was employed for the oxidation of benzyl alcohol in liquid phase using n-heptane as a solvent. The reaction was found to very fast and 100% selective towards the formation of benzaldehyde atxv 363K and atmospheric pressure of oxygen. The reactions were performed at very low reaction temperatures i.e. 323-363K. Cobalt oxide was prepared by was prepared by solid state mechanochemical mixing of cobalt nitrate and ammonium bicarbonate. The synthesized catalyst was employed for the catalytic degradation of two different dyes i.e. Methylene Blue and Congo red. The catalyst was found to be extremely efficient towards the degradation of both these dyes. Both the organic dyes were successfully destructed in a very quick reaction time i.e. 10 minutes. Reactions were carried out in atmospheric conditions and room temperature. Various parameters affecting the degradation performance of the dye were examined such as time, catalyst loading, temperature, initial dye concentrations, speed of agitation and effect of partial pressure of oxygen. The removal percentage of dyes increased with increasing mass of Cobalt oxide up to an optimum mass but decreased with increasing initial concentrations. All the catalysts were heterogeneous in nature, which could be separated easily by simple filtration.