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Relation of barley yellow-dwarf virus infection to rhizosphere fungi in barley and oats, with emphasis on a Cryptomela isolatePizarro, Antonio Crisotomo, January 1966 (has links)
Thesis (Ph. D.)--University of Wisconsin, 1966. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
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The effect of isotherapeutic phytophthora parasitica 200cH on phytophthora parasitica in citrus jambhiri lush treesUys, Janetta 31 March 2010 (has links)
M. Tech.
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Isolation, Identification and Cultivation of Four Phytopathogenic FungiParks, Leroy W. January 1951 (has links)
This investigation includes a morphological and cultural study of four rather common pathogenic fungi one of which attacks Zinnia elegans, one Lagerstroemia indica, one Ligustrum lodense and one Euonymus japonica. The problem includes, first, a determination of the genera of these four fungi as revealed by their morphology in natural habitat; second, a determination of the growth and cultural characteristics of these on Cornmeal, Potato, Bean, Prune and Carrot agars; third, a comparison of the growth and cultural characteristics of these in natural habitat with the same on the various agars used; and fourth, an evaluation of the five artificial culture media in so far as their usage is concerned in the growth and cultivation of these four species of fungi.
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Inhibition of phytopathogenic fungi on selected vegetable crops by catechins, caffeine, theanine and extracts of Camellia sinensis (L.) O. KuntzeWilmot, Michelle 30 July 2008 (has links)
The aim of our study was to determine whether Polyphenon G (PPG, a concentrated Camellia sinensis extract) and the individual compounds in PPG had activity against phytopathogenic fungi in vitro and in vivo. The present study reports on the sensitivity of twenty different phytopathogenic fungal species to extracts from black-, green- and rooibos tea extracts, concentrated green tea extract (Polyphenon G), caffeine, theanine, epigallocatechin gallate (EGCg), epicatechin gallate (ECg), epigallocatechin (EGC), and epicatechin (EC), and Polyphenon G combined with caffeine. The inhibition of fungal growth by the compounds was as follows (in decreasing order): caffeine > EGCg ECg > EGC EC > Polyphenon G > green tea extracts black tea extracts > rooibos tea extracts theanine. In some cases the Polyphenon G and caffeine combination reduced the IC50 values for both the compounds, indicating a synergistic effect. Phytophthora nicotianae and P. capsici were most sensitive to all the compounds, while Rhizopus stolonifer and Penicillium expansum were least sensitive. PPG and caffeine was subsequently tested individually and in combination in a greenhouse trial against seven pathogens on four crops. The combinations of Polyphenon G and caffeine gave the best overall results and effectively controlled Fusarium solani on cucumber, P. capsici and Sclerotium rolfsii on tomato, Sclerotinia sclerotiorum and Pythium F-group on lettuce. PPG individually significantly inhibited the growth of Sphaerotheca fuliginea of zucchini squash plants. In efforts to determine the mode of action of PPG, caffeine and the combination thereof, methods used in our study included determining total phenolic content by means of the Folin-Ciocalteu reagent, thin layer chromatography (TLC) bioautography to identify possible anti-microbial compounds and high performance liquid chromatography (HPLC) for identifying induced compounds based on standards included in the analysis. Results showed that ferulic, salicylic and caffeic acids increased in uninfected lettuce plants treated with a combination of PPG and caffeine. These results indicate that either the phenolic compounds in the treatments were accumulated in the roots or that the treatments induced de novo synthesis in the plants to increase the production of phenolic compounds or that the treatments caused induction of resistance in the plant. The results of the current study demonstrate the potential for tea (C. sinensis) extracts to be developed as effective crop protection agents against a range of plant diseases on a variety of crops. / Dissertation (MSc)--University of Pretoria, 2008. / Microbiology and Plant Pathology / unrestricted
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Effect of the fungal pathogen, Colletotrichum coccodes (Wallr.) Hughes, on growth, reproduction and competitive ability of velvetleaf (Abutilon theophrasti Medik.)DiTommaso, Antonio January 1995 (has links)
No description available.
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Formulation of Colletotrichum coccodes as a bioherbicideSaad, Fadia January 1993 (has links)
No description available.
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Pre-emergence efficacy of Phomopsis convolvulus Ormeno to control field bindweed (Convolvulus arvensis L.)Vogelgsang, Susanne. January 1998 (has links)
No description available.
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Studies on a new species of empusa.Dustan, Alan G. January 1922 (has links)
No description available.
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Enhancing biocontrol activity of Colletotrichum coccodesAhn, Byeongseok January 2003 (has links)
No description available.
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Role of Meloidogne hapla in Sclerotium rot development of bean.Azad, H. R. January 1975 (has links)
No description available.
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