• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 76
  • 70
  • 61
  • 29
  • 10
  • 10
  • 10
  • 10
  • 10
  • 10
  • 5
  • 2
  • Tagged with
  • 292
  • 292
  • 168
  • 59
  • 57
  • 56
  • 55
  • 36
  • 36
  • 34
  • 32
  • 29
  • 29
  • 28
  • 23
  • 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.
21

Cotton Insect Control in Arizona

Roney, J. N. 02 1900 (has links)
This item was digitized as part of the Million Books Project led by Carnegie Mellon University and supported by grants from the National Science Foundation (NSF). Cornell University coordinated the participation of land-grant and agricultural libraries in providing historical agricultural information for the digitization project; the University of Arizona Libraries, the College of Agriculture and Life Sciences, and the Office of Arid Lands Studies collaborated in the selection and provision of material for the digitization project.
22

Insects and Diseases of Cotton

Roney, J. N., Shields, Ivan J. 03 1900 (has links)
This item was digitized as part of the Million Books Project led by Carnegie Mellon University and supported by grants from the National Science Foundation (NSF). Cornell University coordinated the participation of land-grant and agricultural libraries in providing historical agricultural information for the digitization project; the University of Arizona Libraries, the College of Agriculture and Life Sciences, and the Office of Arid Lands Studies collaborated in the selection and provision of material for the digitization project.
23

Cotton Insect Control in Arizona, 1961

Roney, J. N., Wene, George 02 1900 (has links)
This item was digitized as part of the Million Books Project led by Carnegie Mellon University and supported by grants from the National Science Foundation (NSF). Cornell University coordinated the participation of land-grant and agricultural libraries in providing historical agricultural information for the digitization project; the University of Arizona Libraries, the College of Agriculture and Life Sciences, and the Office of Arid Lands Studies collaborated in the selection and provision of material for the digitization project.
24

Sustainable control of soil-borne pathogens in dryland taro cropping systems

Ortiz, Anthony M January 2005 (has links)
Thesis (M.S.)--University of Hawaii at Manoa, 2005. / Includes bibliographical references (leaves 66-68). / x, 68 leaves, bound col. ill. 29 cm
25

Seleção de substratos celulósicos atrativos para o cupim Coptotermes gestroi (Isoptera: Rhinotermitidae) /

Lima, Juliana Toledo. January 2006 (has links)
Orientador: Ana Maria Costa Leonardo / Banca: Sulene Noriko Shima / Banca: José Eduardo Marcondes de Almeida / Resumo: A espécie exótica de cupim Coptotermes gestroi (Família Rhinotermitidae) é considerada uma das pragas urbanas economicamente mais importantes no Brasil. O seu hábito críptico limita os estudos sobre sua biologia e comportamento, o que dificulta um controle realmente efetivo. Uma forma de controle biorracional é a tecnologia de iscas, já que leva em consideração o comportamento social desses insetos, além de preservar o meio ambiente. Seu princípio é a transmissão de agentes químicos ou biológicos diretamente para os cupins, visando atingir toda a colônia. A isca é composta por ingredientes ativos incorporados a substratos que contenham celulose. Para que o controle seja mais eficiente, esses substratos devem ser atrativos aos cupins, estimulando o recrutamento e a atividade de alimentação dos indivíduos. Em vista do exposto, a presente pesquisa propôs, por meio de testes laboratoriais e de campo, selecionar substratos celulósicos mais atrativos e adequados à incorporação de ingredientes ativos. Inicialmente foram testados 12 tipos de substratos, e a partir desses, selecionados 4 que foram utilizados nos bioensaios posteriores. O período de duração dos testes laboratoriais foi de 28 dias. Já para os testes de campo foram executados 8 ciclos experimentais, sendo que cada ciclo durou 7 dias. Todos os resultados foram analisados estatisticamente, com nível de significância (á) igual a 0,05. Os resultados obtidos evidenciaram que os substratos mais atrativos para C. gestroi foram papelão corrugado e colmo de milho. Tais fontes celulósicas...(Resumo completo clicar acesso eletrônico abaixo) / Abstract: The exotic species of termite Coptotermes gestroi (Family Rhinotermitidae) is considered one of the most important urban pests in Brazil. Its cryptic habit limits the studies about its biology and behavior, what difficult an effective control. A way to perform biorrational control of termites is the bait technology, since it considers the social behavior of these insects beyond preserving the environment. Its principle is the transmission of chemical or biological agents straightly for the termites, aiming to reach the whole colony. The bait is composed by active ingredients incorporated to substrates that contain cellulose. In order to improve the efficiency of the bait control, these substrates must be attractive to the termites, stimulating the recruitment and the feeding activity of the individuals. Based on the presented background, this research proposed, by means of laboratory and field tests, to select cellulosic substrates more attractive and suitable to adding the active ingredients. Initially, twelve types of substrates were tested, and four of them were selected, which had been used in the posterior bioassays. The laboratory tests were processed along 28 days, while the field tests demanded eight experimental cycles, each of them during 7 days. All the results were statistically analyzed, at a significance level (á) of 0.05. The results showed that the most attractive substrates for C. gestroi were corrugated cardboard and corn stem. Such cellulosic sources were clearly more consumed than the other materials; in addition they had recruited a large number of individuals to the baits. Some Abstract 4 factors must be considered in the matrix choice, such as their manipulation and viability to termiticid impregnation, aiming to the contribution for the development of more efficient baits in the termite control. / Mestre
26

The genetic control of Aedes aegypti

Haghighat-Khah, Roya Elaine January 2014 (has links)
No description available.
27

Control of Arizona Rose Diseases

Streets, R. B. 02 1900 (has links)
No description available.
28

PEST CONTROL STRATEGIES FOR NON-TRADITIONAL CROPS IN ARIZONA: CURRENT STATUS AND FUTURE NEEDS.

Cross, Dale Robert. January 1983 (has links)
No description available.
29

Nutritional requirement of wheat in relation to tolerance to Rhizoctonia solani Kuhn / by Julie A. Cooke.

Cooke, Julie A. (Julie Anne) January 2000 (has links)
Bibliography: leaves 119-143 / v, 148 leaves : ill. ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--University of Adelaide, Dept. of Plant Science, 2000
30

The absorption, translocation and accumulation of 32P labelled systematic insecticides in grape-vines, with particular reference to their use for the control of Phylloxera vitifoliae Fitch

Coombe, B. G. (Bryan George) January 1956 (has links) (PDF)
Spine title: Systemic insecticides in grape vines. Typescript (copy). Includes bibliographical references (leaf. 82-84).

Page generated in 0.0329 seconds