Global ETD Search

31	A measurement of greenbug, Toxoptera graminum (Rond.), damage to the root systems and other plant parts of several varieties of wheat Ortman, Eldon Emil. January 1957 (has links) Call number: LD2668 .T4 1957 O77 / Master of Science Wheat--Disease and pest resistance. Greenbug. Masters theses
32	Inheritance of resistance to anthracnose in watermelon Dutta, Sisir Kamal. January 1958 (has links) Call number: LD2668 .T4 1958 D89 / Master of Science Anthracnose. Masters theses
33	Measurement of maize weevil and fungi damage to stored corn Mora, Miguel A January 2011 (has links) Digitized by Kansas Correctional Industries Corn--Storage Corn--Disease and pest resistance
34	Phytophthora megasperma var. sojae race 4 : varietal reactions and inheritance of resistance Sim, Thomas January 2011 (has links) Digitized by Kansas Correctional Industries Phytopathogenic fungi Soybean--Disease and pest resistance
35	Effect of growth stage and variety on tolerance of winter wheat (Triticum Aestivum L.) to 2,4-D (2,4-dichlorophenoxyacetic acid), dicamba (2-methoxy-3,6-dichlorobenzoic acid), and bromoxynil (3,5-dibromo-4-hydroxybenzonitrile) /, Mosier, Dwight George January 2011 (has links) Typescript (photocopy). / Digitized by Kansas Correctional Industries Wheat--Fertilizers Wheat--Disease and pest resistance
36	Characterization of virus disease resistance in Lactuca sativa Singh, Rampal January 1994 (has links) No description available. Potyviruses.
37	Evolution and spread of paraquat resistant barley grasses (Hordeum glaucum Steud. and H. leporinum Link) / Imam Hidayat. Hidayat, Imam January 2004 (has links) "February 2004" / Bibliography: leaves 150-185. / xiii, 185 leaves : ill. (some col.) ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / "This project was designed to investgate new resistant populations of Hordeum spp; to assess the role of gene flow in spreading resistance; to determine the fitness of resistant individuals in accelerating resistance evolution; and to identify genetic relationships between resistant and susceptible populations using DNA markers." / Thesis (Ph.D.)--University of Adelaide, School of Agriculture and Wine, Faculty of Sciences, 2005 Barley Disease and pest resistance. Barley Genetics
38	Expression of secondary metabolites following manipulations of the C:N ratio in spotted knapweed, Centaurea maculosa Lam. Brodhagen, Marion L. 12 June 1998 (has links) Spotted knapweed, Centaurea maculosa Lam. (Compositae) is an extremely successful introduced weed species in the northwestern United States. Multiple factors may be responsible for its success, including chemical defense. Two different types of putative chemical defense agents are the focus of this thesis. The first is a bitter-tasting sesquiterpene lactone, cnicin, which occurs at high concentrations in foliar tissues; the second is a group of polyacetylenic compounds produced in the roots. This study represents the first designation of structural identities to polyacetylenic compounds from North American populations of C. maculosa. Both cnicin and polyacetylenic compounds have demonstrated biological activity, suggesting roles in chemical defense. In order to test predictions of chemical defense hypotheses for this plant, concentrations of cnicin and polyacetylenes were measured in a greenhouse experiment in response to varying soil nitrogen and light availability. Light and soil nitrogen availability were important in determining concentrations and content of cnicin, whereas polyacetylene concentrations were not significantly affected by differences in these environmental parameters. Cnicin concentrations were also measured in a field experiment in response to varying levels of soil nitrogen and water. No significant differences in cnicin concentrations were observed among treatments in either young (rosette-stage) or mature aerial tissues. / Graduation date: 1999 Metabolites
39	Inheritance of durable type disease resistance to leaf rust in wheat (Triticum aestivum L.em Thell) Das, Modan Kumar 28 March 1990 (has links) Graduation date: 1990 Wheat -- Disease and pest resistance Leaf rust of wheat
40	Resistance in alfalfa to the blue alfalfa aphid, Acyrthosiphon kondoi Shinji, in relation to environmental factors Lowry, David William January 1979 (has links) No description available. Alfalfa -- Disease and pest resistance. Blue alfalfa aphid.

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