Dissertations / Theses on the topic 'Brown Blight of tea'
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Das, Ruma. "Immunological studies on Brown Blight of tea Camellia Sinensis (L) O Kuntze." Thesis, University of North Bengal, 1996. http://hdl.handle.net/123456789/902.
Full textDatta, Shraboni. "Studies on the Biology of Brown blight disease of Tea, Camellia sinences(L.) O, Kuntze with special reference to the factors effecting its in incidence." Thesis, University of North Bengal, 2000. http://hdl.handle.net/123456789/891.
Full textDas, Gouri. "Studies on the Brown Blight disease of tea Camellia sinensis L. (O.) Kuntze cause by Glomerella cingulata (stoneman) Spauld. & Schrenk. and its interaction with phylloplane microorganisms." Thesis, University of North Bengal, 1995. http://hdl.handle.net/123456789/1088.
Full textSengupta, Debjani. "Serological studies on Blister blight of tea." Thesis, University of North Bengal, 2002. http://hdl.handle.net/123456789/893.
Full textFrercks, Birutė. "Genetic variation of brown rot blossom blight pathogens and their hosts sweet and sour cherry." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20141008_132136-79491.
Full textTyrimų tikslas. Įvertinti trešnės ir paprastosios vyšnios populiacijų ge-netinę įvairovę, ištirti trešnės ir paprastosios vyšnios žiedų bei vaisių užsikrėtimo kaulavaisinių monilioze mechanizmus, nustatyti šios ligos sukėlėjų Monilinia rūšinę sudėtį bei išanalizuoti jų tarprūšinį ir vidurūšinį DNR polimorfizmą. Tyrimų uždaviniai: 1. Išanalizuoti skirtingų pagal atsparumą moniliozinei degligei LAMMC SDI kaulavaisinių kolekcijoje augančių trešnės ir vyšnios veislių ir Vakarų Lietuvo-je augančios laukinės trešnės populiacijos genetinę įvairovę, naudojant molekuli-nius metodus (SSR ir PFIP) bei palyginti PFIP pradmenų kombinacijų informaty-vumo rodiklius. 2. Nustatyti žiedų pažeidimo moniliozine deglige (M. laxa) veiksnius: ištirti žiedo da¬lių atsparumą moniliozinei degligei, nustatyti kuriame žiedo raidos tarpsnyje jie yra jautriausi, įvertinti, ar kuokelių mechaninis pašalinimas (kastravimas) turi įtakos užsikrėtimui moniliozine deglige ir nustatyti ar žiedų ap-dulkinimas gali aktyvuoti augalo imunines reakci¬jas ir užkirsti kelią patogenui patekti į žiedo vidų. 3. Ištirti rudojo puvinio sukėlėjo M. fructigena vystymosi ypatumus kontrastinėse pa¬gal atsparumą rudajam puviniui trešnės ir vyšnios veislėse. Nusta-tyti, ar vaisiai jautresni patogenui yra nokimo pradžioje ar techninės brandos (skynimo) metu, įvertinti vaisių mechani¬nio pažeidimo poveikį užsikrėtimui ruduo-ju puviniu. 4. Identifikuoti Monilinia spp. LAMMC SDI kaulavaisinių kolekcijos augyne rūšinę sudėtį PGR... [toliau žr. visą tekstą]
Das, Subir Kumar. "Studies om host-parasite interaction with special reference to grey blight disease of tea and its phylloplane microorganisms." Thesis, University of North Bengal, 1995. http://hdl.handle.net/123456789/1065.
Full textKouyoumjian, Richard E. "Comparison of compost tea and biological fungicides for control of early blight in organic heirloom tomato production." Connect to this title online, 2007. http://etd.lib.clemson.edu/documents/1202499799/.
Full textPhillips, Stephen. "A cup of tea a study of the Tea Party Caucus in the United States House of Representatives." Honors in the Major Thesis, University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/602.
Full textB.A.
Bachelors
Sciences
Political Science
Saito, Belisa Cristina [UNESP]. "Characterization of corn inbred lines for disease resistance." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/150400.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
O milho é uma das culturas mais extensamente cultivadas em todo mundo. A incidência e a severidade de doenças têm aumentado significativamente nos últimos anos acarretando perdas no rendimento e afetando a qualidade dos grãos. Muitos trabalhos têm sido desenvolvidos na tentativa de identificar híbridos resistentes às principais doenças que acometem a cultura do milho, mas poucos são os relatos de estudos com linhagens. Dessa forma, o objetivo deste estudo foi: 1) identificar linhagens resistentes e susceptíveis com base na área abaixo da curva de progresso de doenças (AACPD) para os sintomas de ferrugem tropical (TR), ferrugem polissora (SR), cercosporiose (GLS), helmintosporiose (NLB), mancha marrom (PBS) e mancha branca (PLS); 2) identificar linhagens resistentes e suscetíveis com base nos parâmetros de adaptabilidade e estabilidade fenotípica para os sintomas de cercosporiose, helmintosporiose, mancha marrom e mancha branca; 3) identificar as melhores datas de semeadura, com a maior ocorrência das doenças, para fins de avaliação de linhagens e outros genótipos para resistência. Cinquenta linhagens, derivadas de populações com grãos flint e dent, foram avaliadas em blocos casualizados com três repetições, aos 45, 60, 75 e 90 dias após a semeadura em duas épocas, para medição da AACPD. Para a análise de adaptabilidade e estabilidade, 41 linhagens foram avaliadas em blocos casualizados com três repetições, 30 dias após o florescimento feminino, em onze épocas de semeadura, usando o método de análise de regressão. Foram atribuídas notas de 1, 2, 3, 4, 5, 6, 7, 8 e 9 correspondendo a 0, 1, 10, 20, 30, 40, 60, 80 e > 80% de área foliar com sintomas de doença. Para a AACPD, a análise de variância conjunta foi significativa para TR, SR, GLS e PLS e a interação linhagens x épocas foi significativa para ferrugem tropical e polissora. Para GLS e NLB as 41 linhagens foram classificadas como resistentes, sendo que as maiores severidades de doenças ocorreram nas semeaduras entre Junho e Setembro. As linhagens IVF1-3, IVF1-7, IVF1 -9, IVF1-10, IVF1 -11, IVF1 -25, IVF1-230, IVD1-2, IVD1 -2-1, IVD1-3, IVD1-9, IVD1 -12, 2F, 3F, 6F, 9F, 10F, 4C, 2D e 7D foram classificadas como resistentes para as doenças estudadas, sendo indicadas para o desenvolvimento de sintéticos. Para a mancha marrom e mancha branca, as semeaduras de Abril, Junho, Julho e Agosto apresentaram maiores severidades de doenças. As linhagens IVD1-9, IVD1-10, 7D, 10D e 2F podem ser indicadas no desenvolvimento de sintéticos resistentes.
Corn is one of the most widely cultivated crops in the worldwide. The incidence and severity of diseases affecting crops have increased significantly in the past years, leading to yield losses and affecting grain quality. Many studies have been carried out with the attempt to identify hybrids that are resistant to the main diseases, but few reports have studied inbred lines. Therefore, the objectives of this study were: 1) identify resistant and susceptible inbred lines based on the area under disease progress curve (AUDPC) for tropical rust, southern rust, gray leaf spot, northern leaf blight, physoderma brown spot and phaeosphaeria leaf spot; 2) identify resistant and susceptible inbred lines based on adaptability and stability parameters for symptoms of gray leaf spot (GLS), northern leaf blight (NLB), physoderma brown spot (PBS) and phaeosphaeria leaf spot (PLS); 3) identify the best planting dates, with the highest occurrence of diseases, for the purpose of evaluating inbred lines and other genotypes for resistance. For AUDPC, fifty inbred lines, derived from populations with flint and dent grains, were evaluated in randomized block designs with three replications, at 45, 60, 75 and 90 days after planting in two seasons. For the analysis of adaptability and stability, forty-one inbred lines were evaluated in randomized blocks with three replications, 30 days after silking, in eleven planting dates, using regression analysis method. The scale of scores from 1, 2, 3, 4, 5, 6, 7, 8 and 9 corresponding to 0, 1, 10, 20, 30, 40, 60, 80 and > 80% of leaf area with disease symptoms was used. For AUDPC, the joint analysis of variance was significant for TR, SR, GLS and PLS, while the interaction inbred lines x environments, was significant for TR and SR. For GLS and NLB, forty-one inbred lines were classified as resistant and the highest severities of diseases occurred in planting dates between June and September. The inbred lines IVF1-3, IVF1-7, IVF1 -9, IVF1-10, IVF1 -11, IVF1 -25, IVF1-230, IVD1-2, IVD1 -2-1, IVD1-3, IVD1-9, IVD1 -12, 2F, 3F, 6F, 9F, 10F, 4C, 2D and 7D were classified as resistant to the diseases studied and are indicated to produce synthetics. For PBS and PLS, the plating dates of April, June, July and August showed higher disease severity. The inbred lines IVD1-9, IVD1-10, 7D,10D and 2F may be indicated to produce synthetics.
Saito, Belisa Cristina. "Characterization of corn inbred lines for disease resistance /." Ilha Solteira, 2017. http://hdl.handle.net/11449/150400.
Full textResumo: O milho é uma das culturas mais extensamente cultivadas em todo mundo. A incidência e a severidade de doenças têm aumentado significativamente nos últimos anos acarretando perdas no rendimento e afetando a qualidade dos grãos. Muitos trabalhos têm sido desenvolvidos na tentativa de identificar híbridos resistentes às principais doenças que acometem a cultura do milho, mas poucos são os relatos de estudos com linhagens. Dessa forma, o objetivo deste estudo foi: 1) identificar linhagens resistentes e susceptíveis com base na área abaixo da curva de progresso de doenças (AACPD) para os sintomas de ferrugem tropical (TR), ferrugem polissora (SR), cercosporiose (GLS), helmintosporiose (NLB), mancha marrom (PBS) e mancha branca (PLS); 2) identificar linhagens resistentes e suscetíveis com base nos parâmetros de adaptabilidade e estabilidade fenotípica para os sintomas de cercosporiose, helmintosporiose, mancha marrom e mancha branca; 3) identificar as melhores datas de semeadura, com a maior ocorrência das doenças, para fins de avaliação de linhagens e outros genótipos para resistência. Cinquenta linhagens, derivadas de populações com grãos flint e dent, foram avaliadas em blocos casualizados com três repetições, aos 45, 60, 75 e 90 dias após a semeadura em duas épocas, para medição da AACPD. Para a análise de adaptabilidade e estabilidade, 41 linhagens foram avaliadas em blocos casualizados com três repetições, 30 dias após o florescimento feminino, em onze épocas de semeadura, us... (Resumo completo, clicar acesso eletrônico abaixo)
Doutor
Martins, Mônica Cagnin. "Produtividade da soja sob influência de ocorrência natural de Septoria glycines Hemmi e Cercospora kikuchii (Matsu. & Tomoyasu) Gardner com e sem controle químico." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/11/11136/tde-23092003-141226/.
Full textTsai, Chih-Chien, and 蔡志千. "Epidemiological study and non-pesticide control of tea brown blight disease." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/76252996003082788489.
Full text國立臺灣大學
植物醫學碩士學位學程
102
Tea (Camellia sinensis (L.) O. Kuntze) is a kind of evergreen perennial shrub or small tree, can be processed to the most widely consumed beverage in the world. Due to its fragrant flavor, tea has been massively grown in Taiwan. Tea can be affected by many diseases, among them the tea brown blight disease (Colletotrichum gloeosporioides) is the most common fungus disease in the field. To investigate the severity of tea brown blight disease, and to control it, this study monitored the disease severity of tea brown blight at Pinglin, Wenshan and Yangmei areas. As a new sprout wilt disease was found at Pinglin, New Taipei, tissue isolation methods were conducted to obtain the suspect pathogen. Results showed that both Colletotrichum and Pestalotiopsis can be isolated from the wilting sprout. Through the rules of Koch’s postulates and molecular identification, we confirmed that the sprout wilt is mainly caused by C. gloeosporioides. Sprout wilt disease can cause 20 to 50 percent of yield loss in Pinglin, resulting in severe economic impact on winter tea in Pinglin area. Culturing this pathogen at different temperatures showed that this pathogen grows best at 25℃ and slower at 15℃, but cannot grow at 35℃. Basing on epidemiological study from December 2013 to June 2014, this disease prefer the low temperature, low humidity and high wind speed. The relationship between sprout wilt and tea brown blight disease is generally positively correlated, indicating that the spores from tea leaves with brown blight disease can splash to sprout by wind and rain and cause the disease. On the other hand, brown blight disease occurred more severe in season of high speed wind. As compared to Ttes No.12, Shy Jih Chuen and Tieguanyin, the cultivar Chih Shih Oolong is the most sensitive to brown blight disease. In order to eliminate the concerns of pesticide residues, non-pesticides control of plant disease is right now a favorite by farmer. Therefore we choose seven kind of plant to prepare their extracts and two antagonistic microorganisms to test to control the sprout wilt in this study. They are ginger, turmeric, cinnamon, cloves, cablin potchouli herb and Chinese magnoliavine fruit. The test of their extracts for effect on mycelial growth and spores germination, showed that only ethanol extract of clove, cinnamon and cablin potchouli herb have some inhibition potential against the pathogen. However, only the ethanol extract of turmeric and garlic (0.2%) exhibit the inhibition rate of about 25% in pot plant test. On the other side, antagonism microorganisms Streptomyces (Streptomyces sp.) YU01 and Bacillus subtilis also have inhibition effect on this pathogen in dual culture experiment. Streptomyces YU01 even has 83% inhibition rate to control the sprout wilt disease in pot plant test, when applied one day before the inoculation. Whereas the Bacillus subtilis has no inhibition effect in pot plant test. A total of 13 fungicides were screened for their control rates on tea brown blight pathogen by mycelial growth inhibition test. Results showed that both benomyl, kasugamycin plus carbendazim, have the best potential to control the disease. In this study, we found that the sprout wilt pathogen can infect not only the Chin Shin Oolong cultivar, but also the cultivar Ttes No.12, Shy Jih Chuen and Dah Yeh Oolong. We also found that anthracnose pathogens from mango, strawberry and coffee, cannot cause the tea sprout wilt. Our study proved that the pathogen from brown blight can transmit and cause sprout wilt as shown in our field survey and pathogenicity test. However the reason of sprout wilt only occur in Pinglin area still need further studies in the future.
Wittig, Hans P. P. "Effect of resident epiphytic fungi development of brown rot blossom blight of stone fruits." Thesis, 1992. http://hdl.handle.net/1957/37180.
Full textGraduation date: 1992
Cheng, Yu-Hsin, and 鄭喻心. "Effect of green tea catechins on the growth of HIB1B brown preadipocytes." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/pd3j96.
Full text國立中央大學
生命科學系
107
Abstract Green tea catechins (GTCs) are a type of natural phenol and antioxidants. They are associated with a variety of health benefits, including the maintenance of cardiovascular health, the reduction of cancer risk, and weight loss. In particular, epigallocatechin gallate (EGCG) was found to reduce the fat synthesis, adipogenic differentiation and preadipocyte growth, while it induced weight loss, lipolysis, and thermogenesis. Although GTCs selectively inhibited the growth of 3T3-L1 white preadipocytes, the exact mechanism of their actions on brown preadipocyte growth is still unknown. Using HIB1B brown preadipocytes, we found that GTCs decreased the growth of brown preadipocytes. EGCG time- or dose-dependently decreased levels of the cell number, BrdU incorporation, and cell viability. EGCG was more effective in inhibiting growth of brown preadipocytes than other green tea catechins, such as epicatechin, epicatechin gallate, and epigallocatechin. This suggests the structure type-dependent effect of green tea. In addition, the potency of EGCG to reduce the growth on brown preadipocytes was greater than that on white preadipocytes, as indicated by changes in cell number. Further Western blotting analysis indicated that EGCG tended to time-dependently increase the phosphorylation of ERKs and AMPK proteins. These observations were different from those reported for EGCG inhibition of ERKs phosphorylation in 3T3-L1 white preadipocytes. These results suggest the ERK-dependent effect of EGCG on preadipocyte mitogenesis, as well as the possible different role of ERKs proteins in mediating the effect of EGCG on the growth between brown and white preadipocytes.
Huang, Zheng-Yu. "Phytotoxin production and population variation in Mycosphaerella dearnessii, the causal agent of brown spot needle blight of pine." 1995. http://catalog.hathitrust.org/api/volumes/oclc/32872096.html.
Full textTypescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 108-122).
Chen, Shiau-Huei, and 陳筱慧. "Determination of γ-Aminobutyric Acid from Developing Bean Sprouts, Active Brown Rice, GABA Tea and GABA Capsules Using High-Performance Liquid Chromatograpgy." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/41360565965521339367.
Full text國立中興大學
食品暨應用生物科技學系
94
GABA exists in the brain and medulla spinalis of mammals. A small of amount of GABA is also found in plants. Available natural foods in the market that richly contain GABA include anka, active brown rice, GABA tea and fermented soybean. Literatures indicate forced germination can greatly increase the GABA contents of seeds. This study, therefore, selects such common edibles as adzuki beans, mung beans, soybeans and wheat seeds for experiment. After causing them to sprout, it tests the degree of germination and examines the GABA content of different germination positions in order to identify the seed that has the best GABA production potential. The most frequently employed HPLC method for examining GABA is the precolumn derivatization method. This experiment selects three derivatization reagents, HN, PITC and OPA, to derivatize the samples, analyze the GABA content through HPLC and compare the results. Experiment results indicate the HN derivatization method is not effective for test objects of complicated ingredients, such as gaba tea, germinated brown rice and germinated seed samples. We were unable to identify the GABA peak on the HPLC spectrum. When dealing with samples that contain large amount of amino acid, such as germinated brown rice and sprouted seeds, the PITC derivatization method is prone to disturbance and has the tendency to overestimate the GABA content. The OPA derivatization method effectively isolates the GABA peak of all test samples of this experiment. That its derivatization is simple and speedy makes it suitable for broader applications. Among the seed samples selected for the experiment, adzuki beans have the highest GABA production potential followed by soybeans. So among the experiment samples, the whole grain of Kaohsiung #7 and #8 adzuki beans sprouted to 6 cm and soybeans sprouted to 9 cm have the greatest GABA content per weight unit. Most of the seeds contain almost no GABA before sprouting. Among the sampling lengths (0 - 9 cm), sprouting of 0.5 cm has the lowest GABA content. When the sprouting is greater than 0.5 cm, the GABA content rises significantly as the length of the sprouting increases. Between sprouted adzuki bean and mung bean products, the taste of adzuki bean product is better than mung bean product. Heating enhances the taste. Among sprouted soybean products, soy milk preserves the greatest amount of GABA. Drinking of 531 mL of the soy milk made according to the process of this experiment will result in intake of 18 mg GABA for reduction of blood pressure. Drinking of 338 mL of the soy milk made according to regular process will attain the same effect.