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Home > Epidemiology and Management of Cercospora Leaf Spot of Peanut Arachis Hypogaea L. in Punjab

Epidemiology and Management of Cercospora Leaf Spot of Peanut Arachis Hypogaea L. in Punjab

Thesis Info

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Author

Ijaz, Muhammad

Program

PhD

Institute

Pir Mehr Ali Shah Arid Agriculture University

City

Rawalpindi

Province

Punjab

Country

Pakistan

Thesis Completing Year

2011

Thesis Completion Status

Completed

Subject

Natural Sciences

Language

English

Link

http://prr.hec.gov.pk/jspui/handle/123456789/1769

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676726077329

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Cercospora leaf spot (CLS) of peanut caused by Cercosporidium personatum (Berk. & M. A. Curtis) Deighton and Cercospora arachidicola Hori is the most important disease in Pakistan. It frequently inflicts colossal yield losses of more than 50% on unsprayed peanuts. CLS of peanut is a potential threat in early monsoon areas of Pothowar region. Keeping in view the economic importance of this disease, the current studies emphasized upon Infection percentage and distribution of the disease in Punjab, influence of weather variables on CLS epidemic on peanut genotypes and management strategies to mitigate the losses caused by the disease. Disease Infection percentage was greater in high rainfall zones of district Attock 87.17 -94.2% and Rawalpindi 74.00 to 82.25%. Early summer rains in low rainfall zones resulted in higher disease Infection percentage (71.62%) when these coincided with early sown crop. Studies on pathogen-environment interaction indicated that higher amount of rainfall, rainfall events and relative humidity in Rawalpindi zone favoured CLS Infection percentage while in Talagang zone these weather variables were less conducive for the disease development. Determination of pathogen species shows Cercosporidum personatum is more significant then Cercospora arachidicola in rainfed regions of Punjab. Cercosporidum personatum isolates have variation for AUDPC, epidemic rate, final severity and sporulation under different environments. Isolates of Cercospora arachidicola and Cercosporidum personatum from Hafizabad in general are more aggressive then isolates from other locations. The variation observed indicates some physiological strains of CLS may be present in the peanut ecosystem. xviInfluence of weather variables on CLS epidemic revealed that monsoon rains making humid thermal ratios (HTR) quite favourable for disease development resulted in significantly higher infection percentage on all genotypes. It was suggested that six fortnight periods from last week of June to mid of September are most critical for the crop as HTR values are likely to remain the most suitable for significant increase in CLS Infection percentage. The model based on days with HTR>3.1 gave a good fit to the data In this model, the onset point of the epidemic was reached 3.5 days with HTR>3.1. Cercospora leaf spot incidence in Chakwal varies from year to year due to environmental conditions. In our model HTR explains most of the observed variation in peanut leaf spot epidemics. HTR>3.1 was best humidity and temperature based weather variable describing peanut leaf spot epidemics. Generally higher disease scores were recorded at late crop growth stages. Peanut genotypes evaluated against CLS under different ecological conditions exhibited variable reaction at different locations and periods depending upon fluctuations of environments. More than 80% germplasm available in the country was Virginia type and late maturing. The germplasm, 20-70% fell under moderately resistant group at flowering stages while at pod development stage 50-80% germplasm became susceptible to CLS. Valencia type plants had lower spots per leaf, sporulation values and reaction indices of spots per leaf X sporulation, spots per leaf X diseased area per leaf and defoliation X spots per leaf, than Virginia and Spanish botanical type plants. Reaction indices of spots per leaf X sporulation can be used for CLS resistance determination for Virginia, Valencia and Spanish botanical peanut types. Crop rotation with non host crops delayed CLS initiation for xvii25-34 and 89-108 days in residual and fallow plots, respectively. 46- 90% variation in peanut yield (Kg/ha) was described by days to disease initiation influenced by change in date of sowing. CLS mitigation by Carbendazim, Benomyl, Mancozeb, Thiophanatemethyl and Mancozeb + Benomyl fungicides significantly reduced CLS Infection percentage at final assessment stage. Peanut genotype BARD-699 was better responsive under protective disease conditions with higher yields than Accession No. 334.
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شہیدعلی محمد ہنگورو

شہید ابن شہید علی محمد ہنگورو

لیاری کی تنگ و تاریک گلیوں میں جنم لینے والا علی محمد ہنگورو بالمعروف ’’علی ہنگورو ‘‘نسل در نسل باوقار جد وجہد سے جام شہادت تک ثابت قدم ،شہید علی ہنگورو کے والد شہید یعقوب ایک مزدور لیڈر تھے ۔

وہ مچھی میانی میں مزدور کاز کا دفاع کرتے ہوئے اپنی جان کی بازی ہار گئے ۔باپ کی شہادت نے کم سن علی ہنگورو پر گہرے نقش چھوڑے غربت پروری اور وفاداری والد سے حصے میں ملی

شہید علی محمد ہنگورو کی زندگی مزدوری سے سندھ اسمبلی نشست تک ان تھک جدو جہد سے پُر ہے اپنی جد وجہد کا آغاز پیپلز اسٹوڈنٹس فیڈریشن اور بعد ازاں سندھ پیپلز یوتھ سے کیا ،وہ جد وجہد پر یقین رکھتا تھا ۔

اپنی اسی روشن خیالی کی بدولت سازشوں ،بہروپیوں اور بھٹو دشمن عناصر قوتوں کو کھٹکتا تھا ،اس نے اپنے وقت کے آمر جام صادق کو للکارا اور اسمبلی کے فلور پر نعرہ حق بلند کیا ۔

یا الہی کسی کم ظرف کو طاقت نہ ملے

کسی ظالم کو زمانے کی قیادت نہ ملے

فکر منفی کو کبھی علم و فراست نہ ملے

اور جب سازشیں حد سے بڑھیں زرداروں کا عمل دخل اور غریب ورکروں کے ساتھ زیادتیاں بڑھنے لگیں علی سید مظفر حسین شاہ کے دور میں آزاد سیٹ پر بیٹھ کر اپنی جدوجہد جاری رکھی ۔

1993ء میں جب میر مرتضی بھٹو کے وطن واپسی پر اعلان کے ساتھ علی شہید نے شہید بھٹو کمیٹی بنا کر میر مرتضی بھٹو کا استقبال کیا پھر نہ رات دیکھی نہ دن لیاری کا یہ کمانڈر استقبال تیاریوں میں مصروف ہو گیا وہ تاریخ...

پاکستان کے مشترکہ خاندانی نظام میں رہائش سے متعلقہ مسائل اور ان کا حل (اسلامی تعلیمات کی روشنی میں ایک جائزہ) Issues of Accommodation in the joint family system of Pakistan and their solution (An analytical study in the context of the Islamic teachings)

A family is the fundamental unit of society. Every society has the presence of a family. The start of a family's life is entirely dependent on matters of co. human relations. All such human relationships are entrenched in islamic sharia as a sacred bond of nikah, in which a husband and wife become a part of the world in the form of a family's collective result. Husband and wife are the most fundamental pillars of society, and their affection and companionship provides a source of stability for them and also a refuge for coming generations.A  family consist of husband ,wife and their children . The family life is begins with marriage, after marriage every woman wants to have her own separate home where all the requirements of privacy are met. Islam has placed the entire responsibility of livelihood on men..But in our society there are two types of family system joint and separate family system. In Pakistan The joint family system is prevalent. The people of the subcontinent are not only adopting this system but they are  also feel proud of it . In the present article the joint family  system has facing many challenges. One of them is accommodation. In this article will focus on  what is the basic concept of accommodation in joint family systems and its solution in Islami teachings. It is critical for the husband and wife to have a home where no one can  interfere on their personal matters. This interference is very much in our society.Which husband and wife facing many  problems. And due to this conditions, the relationship of husband and wife is also affected. Key Words: Joint family system, Issues of Accommodation, Pakistani society, Islamic teachings.

Heavy Metal Accumulation in Dietary Vegetables and its Toxicological Impact on Human Health

Municipal wastewater contaminated with heavy metals is used in for growing crops in the sub urban metropolitan localities. The use of highly polluted wastewater for irrigation purpose by local farmers has been in practice since long which has contaminated and drastically polluted the irrigation soil. Those pollutants are believed to have been transferred to our food chains leading to serious heath related issues. Prolong utilization of unhygienic wastewater for vegetable cultivation has contaminated the soil and accumulate heavy metals in dietary vegetables. Health risk assessment of this unhygienic practice is important to understand because it can provide valuable source of information about any serious health threat to the local population. Untreated effluents from Hayatabad Industrial Estate of Peshawar city and Gadoon Amazai Industrial Estate of Swabi are regularly released into local irrigation channels (streams and canals). Blood analysis of industrial workers was important to know about the heavy metal effect on human health. The aim of the present study is to investigate whether exposure to Pb induces lipid peroxidation and biochemical abnormalities in spent lead acid battery (LAB) workers. An investigation has been conducted to ascertain metal concentrations in the wastewater, soil, vegetables and in the blood of spent battery workers. The concentration of heavy metals (Pb, Cd, Cr, Ni, Zn, Cu, Fe and Mn) was determined by using Atomic Absorption Spectrophotometer. Pb level in blood was determined by graphite furnace Atomic Absorption Spectrophotometer. Oxidative stress parameters were examined by Spectrophotometer. Liver function tests were conducted with Abbott architect Ci8200 and hematological parameters were measured with automated hematology analyzer sysmex. The present study was conducted in five districts (Peshawar, Mardan, Nowshera, Charsadda and Swabi) of Khyber Pakhtunkhwa (KPK), Pakistan. Fresh vegetables were collected from fields of Peshawar and Swabi, while bucket survey method was used for random sampling of vegetables from markets of three districts (Mardan, Nowshera and Charsadda). Blood samples were collected from various spent lead acid battery workers from Peshawar. Heavy metals found higher in wastewater irrigated sectors as compared to fresh water sectors. pH and total suspended solids (TSS) in wastewater were found to be higher than permissible limit set by World Health Organization (WHO, 2007). These results revealed that Cr concentration in the wastewater was well above the permissible limits of United State Environmental Protection Agency (USEPA) which may lead to a detrimental effect on soil quality deterioration, ultimately leading to food contamination. The source identification analysis carried out by Principal component analysis (PCA) and Cluster analysis (CA) showed that ground water and soil were being polluted by the trace metals coming out from industries and domestic wastes. Moreover, PCA extracted two factors for wastewater, each contributing 61.086 % and 16.229 % of the total 77.315 % variance. PCA extracted two factors, for soil samples, having total variance of 79.912 % factor I and II contributed 63.889 % and 16.023 % of the total variance. Anova analysis showed significant difference in soil samples for Pb, Cr, Cd, Ni, Zn and Cu at P ≤ 0.001, for Mn at P ≤ 0.05 while no significant difference was observed for Fe respectively. Anova analysis also exhibited highest mean value for Pb in cabbage, Cr in cauliflower, Cd and Ni in lettuce, Zn in green pepper, Cu in red pepper, Fe and Mn in green pepper respectively. In bucket survey method analysis, concentration of Pb was found to be higher in cabbage, Cr in cauliflower, Cd in cabbage, Ni in garlic, Zn, Fe and Mn in green pepper respectively. Substantial positive correlation was found among the soil and vegetable contamination. Transfer factor for some metals including Cr, Pb, Zn, Mn, Ni, Cd and Cu was greater than 0.5 which showed enhance accumulation of these metals due to contamination caused by domestic discharges and industrial effluents. Linear regression analysis indicated significant correlation of heavy metals viz Pb, Cr, Cd, Ni, Zn, Cu, Fe and Mn in vegetables with concentration in soil of 0.964 at P ≤ 0.001. Health assessment via consumption of dietary vegetables revealed higher than permissible limit (HRI > 1) for Pb and Cd in children and adults. Health risk of Pb and Cd due to consumption of wastewater irrigated vegetables in the study areas is of much concern. Enrichment factor (EF) due to consumption of vegetables was found to be higher for Pb and Cr respectively. The blood samples result showed that blood lead level, superoxide dismutase (SOD) and malondialdehyde (MDA) levels were found to be significantly higher (p < 0.001) while the level of glutathione (GSH) was significantly lower (p < 0.001) in exposed groups compared to control group. Pb showed positive significant correlation with SOD (smoker, exposed group II) and MDA (non smoker, unexposed group II). The values of liver function tests of lead acid battery workers were found to be within the normal range in all age groups except for the albumin content and alkaline phosphatase (AP) activity. Pb showed negatively significant correlation with total bilirubin of unexposed group II. AP activity was significantly higher in both the exposed groups I and II, while Albumin level was found to be lower both in the exposed groups I and II. Pb showed positively significant correlation with WBC and platelet of unexposed group II. The present study revealed that prolonged exposure to Pb is likely to induce lipid peroxidation and biochemical abnormalities in battery workers. Moreover, the likelihood of higher pollution load index for vegetables in the study area due to metal polluted soil has opened a new study area for proper legislation to protect local population from further contamination of vegetables. It is envisaged that the current research work may reveal further serious health risks to human population of the study area.