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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.
1

An investigation into why coccidoxenoides peregrinus (timberlake) (hymenoptera:encyrtidae) is an effective biological control agent in Queensland citrus /

Ceballo, Flor Angel Aquino. January 2001 (has links) (PDF)
Thesis (Ph. D.)--University of Queensland, 2002. / Includes bibliographical references.
2

Studies concerning the pathological anatomy and pilot studies concerning the serological relationships of stubborn disease of citrus

Storm, Leonard William, 1927- January 1960 (has links)
No description available.
3

Antibiotics in the control of citrus fruit rots

Shukri, Mahdi Majid, 1928- January 1955 (has links)
No description available.
4

Comparative serology of several isolates of Spiroplasma citri

Yoshimura, Midori Pi Tsai, 1946- January 1976 (has links)
No description available.
5

Relationship of root distribution and soil moisture to iron chlorosis in Arizona citrus

Sufi, Sadek Mustafa, 1934- January 1958 (has links)
No description available.
6

Ecology of the black citrus aphid Toxoptera citricidus (Kirkaldy) (Homoptera: Aphididae)

Khan, Mafizal Haque January 1979 (has links)
x, 145 leaves : ill., tables, map graphs., photos ; 31 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.1980)--University of Adelaide, Dept. of Entomology, 1980
7

Ecology of the black citrus aphid Toxoptera citricidus (Kirkaldy) (Homoptera: Aphididae)

Khan, Mafizal Haque January 1979 (has links)
x, 145 leaves : ill., tables, map graphs., photos ; 31 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.1980)--University of Adelaide, Dept. of Entomology, 1980
8

Investigations into the ecology of a population of Citrus Red Scale (Aonidiella aurantii Mask.) in the Swaziland lowlands

Atkinson, P R January 1982 (has links)
In the Swaziland lowlands, biological control of the citrus pest red scale, Aonidiella aurantii (Mask), has been consistently unsuccessful although it is successful in middle altitude regions. However, recent cases of resistance to organophosphate insecticides elsewhere in southern Africa, make it important to reconsider biological control of red scale in the lowlands. Should similar resistance be evolved in this region, the pest could be controlled only by natural means together with oils. This account attempts to answer questions about the natural control of a red scale population in the lowlands, by examining data collected between 1972 and 1975. The population was continuously breeding with overlapped generations. It consisted of three sections, on leaves, twigs and fruit, having different rates of reproduction, development and mortality. These sections are considered separately but that on leaves, being relatively unimportant, is largely ignored. The generation mortality is estimated in the sections on twigs and fruit and related to climatic and biotic indices. The causes of seasonal and between-years variation in the sections on twigs and fruit are elucidated. The effectiveness of each kind of natural enemy is examined and the factors affecting natural enemy numbers are investigated. The question of population regulation is discussed. Differences in mean infestation levels in middle altitude and lowland regions are explained in terms of different rates of reproduction and mortality.
9

Some aspects of the insect ecology of citrus orchards

Smithers, Courtenay Neville January 1954 (has links)
After a brief introduction, the species of Citrus on which the investigations were carried out are mentioned. This is followed by an account of the methods of collection used, and a discussion of their relative merits. The main method used was that in which the trees were fumigated with hydrocyanic acid gas, and the insects falling from the trees were taken up on sheets. The location of the areas where collections were made are then given. An annotated list of the species taken by the fumigation method follows, and the numerical data obtained at the same time regarding the species present is given in an abbreviated form and discussed. A more detailed discussion of the relative abundance of the species is then undertaken. The discussion of the ecology of the insects commences with the insects listed according to their activities, so far as known, and an account of five trees of striking faunal differences is given. A broader discussion of citrus ecology is then given, based on the data previously presented; this ends with a short reminder of the inherent 'oneness' of the insect with its environment.
10

Some Aspects of Citrus Tree Decline as Revealed by Soil and Plant Studies

McGeorge, W. T. 15 February 1936 (has links)
No description available.

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