Thesis (Ph. D.)--Cornell University, 1909. / Cover title. "Part 1. Reprinted from Jour. agr. research, vol. IV, no. 4, July, 1915. Part 2. Reprinted from Proc. Am. breeders assn., vol. VII, 1912."

Thesis--Berlin. / Vita. Includes bibliographical references (p. 268-285).

Thesis (MS)--Montana State University--Bozeman, 2009. / Typescript. Chairperson, Graduate Committee: Fabian D. Menalled. Includes bibliographical references.

Thesis (Ph. D.)--University of Chicago, Dept. of Biology. / Includes bibliographical references. Also available on the Internet.

Thesis (PhD) - Environment and Biotechnology Centre, Faculty of Life and Social Sciences, Swinburne University of Technology, 2008. / Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy, Environment and Biotechnology Centre, Faculty of Life and Social Sciences, Swinburne University of Technology - 2008. Typescript. "July 2008". Includes bibliographical references (p. 317-336).

Thesis (Ph.D.) - University of Queensland, 2004. / Includes bibliography.

Thesis (Ph. D.)--John Hopkins University, 1928. / Vita. From the Zeitschrift für zellforschung und mikroskopische anatomie, bd. 7, 1928. "Literature cited": p. 731-733.

Thesis (M.S.)--University of Wisconsin--Madison, 1965. / eContent provider-neutral record in process. Description based on print version record. Bibliography: l. 62-63.

A espÃcie Tagetes erecta Linn, vulgarmente conhecida como Tagetes, à nativa do MÃxico. Suas flores sÃo cultivadas, colhidas e processadas numa importante escala industrial como fonte de alto valor de corante, da famÃlia dos carotenÃides. A forma de utilizaÃÃo do Tagetes à como pÃtalas desidratadas e concentrados, que sÃo usados como aditivos na alimentaÃÃo para melhoria da pigmentaÃÃo de pele e ovos de galinhas. Conduziu-se um experimento na Chapada do Apodi (CE), nos meses de junho, julho, agosto, setembro, outubro e novembro de 2003. O delineamento utilizado foi o de blocos ao acaso em esquema fatorial (6x5x4), sendo seis Ãpocas, cinco tipos (trÃs hÃbridos e duas variedades) de Tagetes com quatro espaÃamentos de plantio (0,10 m; 0,15 m; 0,20 m e 0,25 m) nas seguintes densidades de (200.000; 133.333; 100.000; 80.000), respectivamente, com trÃs repetiÃÃes por tratamento. A variedade V1 (hÃbrido F150011) foi em mÃdia a mais produtiva, com 25,47 t/ha. Em todas as Ãpocas de plantio, o hÃbrido F150011 foi o que mostrou o maior nÃmero de flores por hectare e seguidas das variedades V4 (A5893 P) e V5 (A0861P) com o nÃmero de flores por hectare de (0,48 milhÃes de flores/ha e 0,53 milhÃes de flores/ha). A maior altura foi encontrada na variedade V2(F1 80447) com mÃdia de 88,92 cm. O hÃbrido F1 50011 obteve o maior diÃmetro mÃdio de flor (7,06 cm). Diante disso, constatou-se que, quanto menor o nÃmero de flores, maior o seu peso individual, com conseqÃente maior produÃÃo de pÃtalas por flor. O hÃbrido F1 50011 foi superior sobre as demais com o maior nÃmero de flores/ha em todas as densidades de plantio estudadas. Verificou-se que na 5 e 6 Ãpoca de plantio (perÃodo chuvoso) os espaÃamentos 20cm e 25cm entre plantas, mostraram-se mais adequado para o hÃbrido F150011 (20,22 t/ha e 19,78 t/ha) e no perÃodo seco ( 1Â, 2 e 3 Ãpocas) as maiores produÃÃes de flores, para a mesma variedade, foram obtidas nas densidades maiores (200.000 e 133.333 plantas/ha) nos espaÃamentos 10 e 15 cm. Este trabalho objetivou avaliar, nas condiÃÃes climÃticas do semi-Ãrido nordestino, diferentes variedades hÃbridas e de polinizaÃÃo aberta de Tagetes, em diferentes densidades e Ãpocas de plantio, para obtenÃÃo de maior produtividade de flores. / The specie Tagetes erecta, commonly known as marigold, it is native of Mexico. The flowers are cultivated, picked and processed in an important one scale industrial as source of high color value, of the family of the caroteno ids. The form of use of the marigold is as dehydrated petals and concentrated, that are used as addictive in the feeding for improvement of the skin pigmentation and eggs of poultry. An experiment field conditions was carried out from June to November 2003, in the Plated of Apodi, Limoeiro do Norte, CearÃ, Brazil. The treatments consisted of three hybrid varieties and two varieties of open pollination, constituting the plots, in four planting densities (0,10m; 0.15; 0,20m and 0,25m) x 0,50m, constituted the split-plot and evaluated in si x planting, with three repetitions. The variety V1 (hybrid F150011) it was on average the most productive, with 25,47 t /ha. In all of the planting period, the variety F1 50011 presented the largest number of flowers for hectare and the variedades V4 (A5893 P) and V5 (A0861P) presented the smallest number of flowers for hectare (0,48 million flowers /ha and 0,53 million flowers /ha, respectively). To cultivate V2 (F1 80447) he/she obtained the largest height, with average of 88,92cm. The variedade F1 50011 showed to smallest plant height, although the plant height doesn't have influences on the total weight of flowers This same variety also presented the largest diameter medium of flower (70,66mm). Concluded that as smaller the number of flowers, larger it individual weight, with larger consequent production of petals for flower. The variety F1 50011 presented the largest number of flowers /ha in all of the planting densities studied, where in the planting densities (200.000 and 133.333 plants /ha), were almost obtained 2,0 million flowers. It was verified that in the 5a. and 6a. planting (rainy period) the 20cm and 25cm spacing among plants, best for the variety F1 50011 (20,22 t /ha and 19,78 t /ha, respectively) and in the dry (1st, 2nd and 3rd) period, the larg est productions of flowers, were obtained in the smaller densities (200.000 e 133.333 plants/ha).

Biological pre- and postharvest disease control strategies depend on successful colonisation and survival of the introduced antagonists on the infection court. Effective and economical applications involve targeting the antagonists where they are critically needed i.e. the infection court. Honeybee dispersal is one method of antagonist application to such specific sites. In view of this, an in vitro experiment was conducted to investigate attachment, colonisation and survival of Bacillus subtilis on avocado flowers. Scanning electron microscopy studies showed that the bacterium could attach and colonise avocado flower surfaces. It can also survive on the flowers for longer periods of time. In vivo mode of action of the antagonist against stem-end rot (SER) pathogens was also studied where results showed lysis and degradation of hyphae and conidia. However, no viable colonies were retrieved from bee antagonist dispersal under field conditions. Bee antagonist dissemination was compared with antagonist and fungicide spray applications in terms of SER control and the added effect on other diseases such as Cercospora spot and anthracnose. Spray applications of the antagonist were more effective in reducing the incidence of SER than bee dissemination. Integrated sprays of the antagonist and fungicides significantly reduced the incidence of both pre- and postharvest diseases. The identity of Dothiorella aromatica, one of the most important SER pathogens, was investigated at a molecular level. RAPD techniques using the discriminatory OPC02 primer successfully separated isolates into three groups based on banding profiles. A further study using RFLP identified the pathogen as a Botryosphaeria spp. The most dominant specie was B. parva followed by B. rhodina. Further studies should focus on assessing the distribution of these pathogens within avocado-growing regions of South Africa. / Dissertation (MSc (Plant Pathology))--University of Pretoria, 2006. / Microbiology and Plant Pathology / unrestricted