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Screening of Tomato Cultivars Against Root Knot Nematodes and Their Biological Management

Thesis Info

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Author

Khan, Sajid Aleem

Program

PhD

Institute

University of Agriculture

City

Faisalabad

Province

Punjab

Country

Pakistan

Thesis Completing Year

2009

Thesis Completion Status

Completed

Subject

Natural Sciences

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/2097/1/45S.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676727144300

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Research was done on two important groups of nematodes plant parasitic nematodes and insect parasitic nematodes (entomopathogenic nematodes). Among plant parasitic nematodes root knot nematodes are the most important. It has a wide host range. Tomatoes are the most seriously affected by Meloidogyne incognita. Different varieties were tested against M. incognita for susceptibility, invasion and development of M. incognita. Moneymaker, Titano, California, Peelo, Nagina, Riogranade and Pakit were highly susceptible while Fonto, Tarnab, Lima, VF-400, PETO-86 and Samrutti were susceptible. Calmart VFN proved resistant. There was a positive relationship between the inoculum level of M. incognita and root weights and inverse relationship with shoot weights. Effect of plant age on plant susceptibility to nematode infection was also studied. Plant extract of neem, onion, garlic, tobacco, aloevera, cloves and chili was investigated for larval mortality and egg hatching of M. incognita. Mortality of nematodes increased with exposure time and extract concentration. Effect of plant extracts on root knot nematodes applied after root knot nematodes and bare dip root treatment was also studied on plant growth parameters plant height, fresh shoot weight, dry shoot weight and fresh root weight. Among all the plant extracts tested neem proved effective followed by onion and tobacco while chili proved less effective as compared to the other plant extracts.In the second part of thesis, effect of entomopathogenic nematodes S. asiaticum, S. glaseri, H. indica and H. bacteriophora on the development of M. incognita, effect of different inoculum levels, and time of application, live and dead EPN on RKN in addition to the persistence in soil was also studied. Suppression of M. incognita varied with application rate. The high application rates of EPN reduced M. incognita infestation as compared to low rates. Reduction in root knot nematode invasion and development was recorded. Numbers of EPN were reduced in non-sterilized soil. Both dead as well as live entomopathogenic nematodes and their material were responsible for lower invasion by M. incognita in tomato.
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جیدی یاد توں جان لکائی ہوئی اے

جیہدی یاد توں جان لکائی ہوئی اے
اوہو یاد ہر ویلے ای آئی ہوئی اے
دکھ گھل دے سارے ول ساڈے
پنڈ دکھاں دی مہُرے ای چائی ہوئی اے
دکھ درد دا نہیں احساس کردے
یاری بے درداں نال لائی ہوئی اے
جان جندڑی روح تے دوس کوئی نہیں
ہر شے ای ایتھے پرائی ہوئی اے
تیری یاد وچ وقت جو گزر جاوے
اٹھے پہر دی ایہو کمائی ہوئی اے
چور چوہدری جگ نوں مت دیندے
عقل مند دی جگ ہنسائی ہوئی اے
موڑ پرت مہار ہن ول ساڈے
سنیا ہے بہار وی آئی ہوئی اے

سربراہ ریاست کے اختیارات: جدید مغربی سیاسی افکار کا سیرت نبوی کی روشنی میں تجزیاتی مطالعہ

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Impact of Glass Ceiling on Organizational Commitment: Evidence from Banking Sector of Pakistan

Women empowerment is considered as an important step to strengthen economy and improving quality of life for any community. Besides all the announcements of packages for women empowerment by Pakistan government and claims of equal employment opportunities by banking sector, we can see a number of working women still complaining about injustice and perceiving glass ceiling in their respective organization. Perceived glass ceiling is a notion that is associated with situation where women perceive that they can promote up to a specific level of organizational hierarchy. In banking sector, female employees also complain that they are facing discrimination in workplace, while according to some employees gender wage gap still exists even in present times. This study aims to illuminate the perception of female employees working in banking sector. I extend the prior work that has been done yet, on impact of glass ceiling on organizational commitment. Now the current study assesses the impact of perceived glass ceiling on organizational commitment and it is all three components, called as, affective commitment, continuance commitment and normative commitment. This research is inspired by two research objectives (1) to identify the impact of perceived glass ceiling on three components of organizational commitment named as affective commitment, continuance commitment and normative commitment and (2) to identify the impact of perceived glass ceiling on overall organizational commitment among female employees of banking sector. Prior studies have indicated negative impact of glass ceiling on organizational commitment and injustice perception of working women in corporate sector and academic field. Meyer and Allen have suggested three components of organizational commitment; called as affective commitment, continuance commitment and normative commitment. No study before have assessed impact of glass ceiling on these components separately. Besides, no prior research has yet considered impact of perception of glass ceiling on organizational commitment. Keeping in view, Meyer and Allen?s work, current research proposed a theoretical framework that links three- component model to perceived glass ceiling. By bridging two literature gaps, this study proposes four hypothesis i.e. (1)Perceived glass ceiling is negatively related with organizational commitment; (2)Perceived glass ceiling is negatively related with affective commitment; (3) Perceived glass ceiling is negatively related with continuance commitment and (4)Perceived glass ceiling is negatively related with normative commitment. A deductive research has been conducted supported by a survey in which 195 female employees of banks has been participated. For this survey, judgmental sampling technique has been used. While the instrument used for the survey was combination of Workplace Prejudice/Discrimination Inventory, Organizational Commitment Questionnaire and Organizational Commitment scale. It was consisted on four sections containing 25 items, first section include demographic constructs, while other three sections were about perceived glass ceiling, organizational commitment and its three component. Findings from the research illustrate that female employees perceives glass ceiling to some extent. However, majority of respondents believes that they do not perceive glass ceiling in bank where they are working. Findings of survey revealed uneven distribution of human capital among higher positions in banks. While the results confirmed inverse relationship between perceived glass ceiling and organizational commitment. Results also support the model by verifying negative impact of PGC on affective commitment, continuance commitment and normative commitment.