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Integrated Management of Fusarium Wilt of Potato

Thesis Info

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Author

Sania Ahmed

Program

PhD

Institute

Pir Mehr Ali Shah Arid Agriculture University

City

Rawalpindi

Province

Punjab

Country

Pakistan

Thesis Completing Year

2019

Thesis Completion Status

Completed

Subject

Plant Pathology

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/11351/1/sania%20Ahmed_PMAS_Plant%20pathology.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676726477169

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Fusarium wilt of potato caused by Fusarium oxysporum f.sp. tuberosi is an important disease that causes losses to potato growers in Pakistan. Limited information is available about the management of this disease. Therefore different control measures were investigated under lab. and green house conditions and then the best treatments were applied collectively in integrated management trial. To fulfill first objective, pathogenicity test was performed to check the virulence of the pathogen on susceptible variety “Desiree”. Isolate Okara-1 (O1) proved to be highly virulent and was used in all management trials. In screening of germplasm,. two varieties and eight lines were used for screening purpose.Cardinal and Karoda showed least mean disease severity index (MDSI) i.e. 22.67 and 16.00 % with the yield reduction of 23.2 and 25.5 % respectively. After varietal screening, chemical management was done by using 5 fungicides namely Topsin-M, Carbendazim, Score, Copper oxychloride and Ridomil under lab and green house conditions.In vitroresults showed that Carbendazim and Topsin-Mcontrolled maximumradial growth of fungus (100 %) as compared to rest of the fungicides. Green house results showed that Carbendazim followed by Topsin-M gave less MDSI (17.67% and19.00 %) as compared to Copper oxychloride (55.00 %). The yield reduction by Carbendazim and Topsin-M was 21.59% and 25.91 % as compared to copper oxychloride i.e. 60.91%. Efficacy of biological control agents Trichoderma hazianum and T. virens were checked under lab. condition. T. virens showed higher percent inhibition as compared to T. harzianum in dual culture assay on PDA. Green house results showed that application of T. virens at the time of sowing, 20 and 40 days after sowing (DAS) gave less MDSI (30.76 %) as compared to T. xv harzianum (34.14 %) with yield reduction of28.283 % and 32.56 % respectively. Efficacy of Brassica spp.was checked under lab. conditions, the macerated leaves of B. juncea significantly reduced the radial growth of pathogen i.e. 91.75 % as compared to B. napus(85.67 %). The roots of both brassica spp were less effective in controlling the disease. Under green house conditions, B. juncea leaf extracts reduced the MDSI by 42.95 % as compared to B. napus i.e. 45.61 %with no significant results by roots of both spp.As the management of the disease is difficult by single control measure therefore the best treatments from above mentioned experiments were applied together in integrated management trial. The integration of soil treatment with T. virens at the time of sowing, 20 and 40 DAS, green manuring with B. juncea and seed treatment with carbendazim exhibited significant results in reducing Fusariumwilt as compared to single or dual application of these in green house. The results of this study showed importance of integrating selective fungicide, microbial antagonists and biofumigant crop to achieve appropriate management of Fusarium wilt to increase yield of the crop.
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آپؐ کے نقشِ پا سے مزین زمیں ، خاتم المرسلیں

آپؐ کے نقشِ پا سے مزین زمیں، خاتم لمرسلیںؐ!
اَرضِ بطحا نے پائے ہیں کیسے نگیں، خاتم لمرسلیںؐ!

آپؐ کی بات کا صدق دل سے یقیں ،اے رسولِ امیں!ؐ
آپؐ کو غیر کہتے ہیں صادق امیں ،خاتم لمرسلیںؐ!

آپؐ کو جو رکھیںجان و دل کے قریں ،رحمتِ عالمیں!ؐ
صاف کہتا ہے قرآں انہیں مومنیں ، خاتم لمرسلیںؐ!

آپؐ کا جو ہوا ، سب اُسی کا ہوا ، اے حبیب خداؐ!
آپؐ کا جو نہیں ، وہ کہیں کا نہیں ، خاتم لمرسلیںؐ!

خوش طبع ، خوش ادا ، سیرت خوش صفا ، صورتِ والضحیٰ
خوش خط و خوبرو ، دلکش و دلنشیں ، خاتم لمرسلیںؐ

آپؐ کے بعد آئے نبیؐ دُوسرا ؛ میں نہیں مانتا
سیّد الاوّلیں ، سیّد الآخریں ، خاتم لمرسلیںؐ!

تُو لکھے حرفِ مدحت، پڑھے نعت کیا ، تیری اوقات کیا
دی گئے تجھ کو عرفانؔ! لحنِ حسیں ، خاتم لمرسلیںؐ

Intake of Anti-Epileptic Drugs and their Influences on Sexual Dysfunctions

Epilepsy which is also called seizures disorder is an uncontrolled action of the central nervous system. It is not a single disease but a set of neurological disorders. Actually in this situation, the brain does not receive a precise signal and as a result an abnormal condition is produced that is usually involuntary in action. In this review, we aimed to focus on the relationship of anti-epileptic drugs with sexual dysfunction and adaptation of better remedies that improve a patient’s family life. Sexual dysfunction is a common comorbidity in people with epilepsy which badly affects their quality of life. Sexual dysfunction is caused by different factors like psychiatric problems, anti-epileptic drugs (AEDs) and social factors etc. Sexual dysfunctions include ejaculatory failure, lessen libido, penile erection in men and irregular menstrual cycle in women. Common drugs such as Topiramate, Gabapentin (GBP), Valproate (VA), Carbamazepine (CBZ), Olanzapine (OL) and Risperidone (RTG) that are in practice to treat epilepsy usually produced adverse effect on sexual dysfunction. Even though a lot of studies have been carried out to control sexual dysfunction in epilepsy’s patient, but still research is going on. Medicine such as Cyproheptadine, Mianserin, Buspirone, Yohimbine were found better to treat epilepsy with minimum side effects of sexual dysfunction. Moreover, it is also seen that certain vasodilators,  folate , and vitamin supplements are effective in improving the quality of life.

Interference of Horse Purslane Trianthema Portulacastrum L. With Maize Zea Mays L. at Different Densities

Horse purslane (Trianthema portulacastrum L) a member of family Aizoaceae is a common weed in a host of crops such as maize, soybean, sugar cane vegetables and cotton in Pakistan and elsewhere. In order to quantify the impact of Trianthema portulacastrum on maize, experiments were conducted at Agricultural Research Farm, NWFP Agricultural University Peshawar, Pakistan for two crop seasons, viz. 2006 and 2007, using open pollinated variety “Azam”. The experiments were laid out in a Randomized Complete Block design with split plot arrangements, having, three replications per treatments. Four maize plant spacing (15, 20, 25 and 30 cm) were kept in main plots, while weed densities (3, 6, 9, 12, 15 and 18 m -2 ) were allocated as sub-plots. Data were recorded on days to 50% tasseling, days to 50% silking, days to maturity, plant height (cm), numbers of ears plant -1 , rows ear -1 , kernels ear -1 , ear weight (g), 1000-kernel weight (g), maize leaf area index, biological yield (t ha -1 ), grain yield (t ha -1 ), harvest index (%) and weed (T. portulacastrum) biomass (t ha -1 ). All growth parameters except for the number of ears plant -1 and rows ear -1 were affected by planting season, plant spacing and weed density. Plant spacing of 15 cm produced higher grain yields of 2.85 and 2.66 t ha -1 compared with 2.30 and 2.08 t ha -1 in wider plant spacing of 30 cm for the planting seasons of 2006 and 2007, respectively. However, for both years, yield components like ear weight and kernels ear -1 of individual plants were reduced with parallel decrease in plant spacing. Similarly, weed-free control plots produced higher grain yields of 3.04 and 2.87 t ha -1 vis-a-vis the grain yields of 2.14 and 2.0 t ha -1 in plots having weed density of 18 plants m -2 in 2006 and 2007, respectively. Plant spacing of 15 cm also resulted in higher biological yields of 6.96 and 6.69 t ha -1 in comparison with 30 cm spacing producing 5.92 and 5.85t ha -1 in 2006 and 2007, respectively. In the same vein, control plots had biological yields of 7.28 t ha -1 and 7.09 t ha -1 as compared with 5.81 t ha -1 and 5.65 t ha -1 in plots having weed density of 18 plants m -2 in 2006 and 2007, respectively. Plant spacing of 15 cm resulted in lower fresh weed biomass of 0.91and 0.88 t ha -1 compared with plant spacing5 of 30 cm producing higher weed biomass of 1.33 and 1.21t ha -1 in the growing seasons of 2006 and 2007, respectively. Likewise, the lower weed density of 3 plants m -2 resulted in lower weed biomass (0.97 t ha -1 in 2006 and 0.93 t ha -1 in 2007) compared with higher weed density of 18 plants m -2 (1.55 t ha -1 in 2006 and 1.49 t ha -1 in 2007). Decreasing plant spacing and increasing weed density of T. portulacastrum delayed tasseling, silking and maturity of grains. The T. portulacastrum infestations in plots having 3, 6, 9, 12, 15 and 18 plants m -2 resulted in yield losses of 4.2, 11.1, 18.6, 20.4, 27.2 and 29.5 % in 2006. The parallel figures for 2007 were 9.3, 14.3, 18.3, 23.2, 25.1 and 30.2 % in 2007. The two years of research showed that narrow spacing enhanced the competitive ability of maize crop and suppressed weed growth which eventually resulted in higher yields. Trianthema portulacastrum was a strong competitor to maize, and its infestation may inflict substantial yield losses, although the competitive ability was dependent on plant spacing and weed density. Plant spacing alone was not effective in suppressing T. portulacastrum; therefore, other cultural practices should also be integrated with optimum spacing to reduce the yield losses in maize crop. Key words: Trianthema portulacastrum, weed competition, maize.