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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.

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Showing 51 to 60 of 2446 (0.033 seconds)

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51

Effects of defoliation by Neodiprion sertifer (Geoff.) on the growth of young crops of Pinus contorta Dougl

Britton, Richard John January 1985 (has links)
No description available.
634.9
Pine plantation pests
52

Studies on the relation of certain morphological characters of the host and fungus to the identification of the loose and covered smuts of oats

Kingsley, Eunice Leola January 2011 (has links)
Typescript, etc.
Oats--Diseases and pests
53

Seed treatments for insect control, with special reference to their effect upon germination

Kent, Virgil Fletcher January 1930 (has links)
No description available.
Insect pests--Control
54

Studies on the development of the cultures and the susceptibility of alfalfa to leaf spot, Pseudopeziza medicaginis

Townsend, Charley Eugene January 1951 (has links)
No description available.
Alfalfa--Diseases and pests
55

Characterization of dsRNA species in tobacco exhibiting non-geminivirus leaf curl symptoms

Calvert-Evers, Jennifer January 1996 (has links)
A thesis submitted to the Faculty of Science, University of the Witwatersrand, Johannesburg, in partial fulfillment of the requirements for the degree of Master of Science. Johannesburg, 1996. / Tobacco in Southern Africa has been found to exhibit three forms of leaf curl (class I, II and III) based on symptomology. Class I tobacco leaf curl is a disorder of unknown etiology, appearing as bent or twisted leaves exhibiting frilly enations (leafy outgrowths) along the midrib and secondary veins of severely stunted tobacco plants.[Abbreviated Abstract. Open document to view full version] / AC2017
Tobacco--Diseases and pests
56

Physiological relationship of vigna sesquipedalis fruw with a rust and an aphid.

January 1977 (has links)
Chang Lee Hwa. / Thesis (M.Phil.)--Chinese University of Hong Kong. / Bibliography: leaves 141-147.
Beans--Diseases and pests
Aphids
57

Studies on leaf-spot disease of lettuce (lactuca sativa L.) caused by cercospora longissima (Cug.) Sacc.

January 1975 (has links)
Thesis (M.Phil.)--Chinese University of Hong Kong. / Bibliography: leaves 109-121.
Lettuce--Diseases and pests
58

Characterization of tobacco ringspot virus isolated from Kansas soybean

Mundt, Jonathan R January 2010 (has links)
Digitized by Kansas Correctional Industries
Soybean--Diseases and pests
59

A study of the corn leaf aphid, Rhopalosiphum maidis (Fitch) on grain sorghum in Kansas

Ohiagu, Clifford E. Odinkenmere January 2010 (has links)
Digitized by Kansas Correctional Industries
Sorghum--Diseases and pests Kansas.
60

Initial frequencies of alleles for resistance to Bacillus thuringiensis toxins in field populations of Plutella xylostella and Helicoverpa armigera

Ahmad, Mahmood. January 1999 (has links) (PDF)
Leaves 101-104 are misnumbered. Bibliography: leaves 155-215. In this study thirteen populations of P. xylostella from crucifer growing areas of Queensland, Victoria, Tasmania, South Australia and Western Australia were surveyed for resistance to Bt (Bacillus thuringiensis) toxins using a leaf-dip bioassay method.
Pests Biological control

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