Inauguraldiss.--Basel. / Curriculum vitae. "Aus dem Naturhistorischen Museum Basel." "Separatabdruck aus Verhandlungen der Naturforschenden Gesellschaft in Basel, Bd. 65, Nr. 2, 1954." Bibliography: p. 254-259.

Inauguraldiss.--Basel. / Curriculum vitae. "Aus dem Naturhistorischen Museum Basel." "Separatabdruck aus Verhandlungen der Naturforschenden Gesellschaft in Basel, Bd. 65, Nr. 2, 1954." Bibliography: p. 254-259.

Thesis (M.S.)--Ohio State University. / Bibliography: leaves 69-74. Available online via OhioLINK's ETD Center

Faunistic composition and population dynamics of chrysopids were investigated in two old fields in Quebec. Nine species were collected; Chrysopa oculata Say and Chrysopa chi Fitch are dominant and resident. / Parasitism due to Chrysopophthorus americanus Mason has little effect on the reproductive potential of C. oculata and C. chi populations. However, embryonic mortality, resulting from autosomal translocations, is a major mortality factor in both species. Their karyotypes are described and developmental studies conducted on them and Chrysopa lineaticornis Fitch are reported. / Inheritance of wing and cephalic characters was investigated in C. oculata. A population genetics study revealed seasonal selection against the allelic gene B (black gradates) and superior fitness of its recessive counterpart b (green gradates). A meiotic drive mechanism also favors the b allele, and the allele A determining "facial band" expression. / Chrysopa chi exhibits obligatory and facultative prepupal diapause. The field population, however, is primarily univoltine. Voltinism is controlled by two independently segregating autosomal genes; the recessive alleles, in the homozygous state, determine obligatory diapause and, consequently, univoltinism. Diapause termination is reported.

No description available.

The writer undertook a preliminary investigation of the taxonomy and geographic distribution of a group of neuropterous insects, the Chrysopidae, in Utah. The main purposes of the investigation were to find what species and forms of these beneficial insects occur in Utah, to provide means for their identification, and to report upon their geographical distribution. Two main methods of investigation were employed. The first, a bibliographic method, was to carefully review the literature concerning the Chrysopidae of the United States for all references pertaining to their distribution and their taxonomy. The second method of investigation was to study insect specimens of Utah Chrysopidae in order to check the findings of former investigators and to add to our knowledge of this group of insects if at all possible. Fortunately, the writer was privileged to study a large number of specimens in the insect collections of Brigham Young University, the University of Utah, the Utah State Agricultural College and Dixie College in addition to his own personal collection. Keys and other taxonomic aids for the identification of the species which have been recorded in the literature as from Utah as well as the species which are recorded as a result of this investigation are provided. The report on geographical distribution is limited in this preliminary investigation to collection records. As a part of this preliminary investigation, the following material is included: (1) a list of species which have been described from surrounding states which may possibly occur in Utah; (2) a history of the study of this group of insects in Utah; (3) a section on the external morphology of the Chrysopidae; (4) a section with information on collecting, preserving, and rearing of these insects and recording of data; and (5) a glossary. It is hoped this supplementary material will aid in the utilization of the report on taxonomy and distribution and will provide a foundation of basic information for future studies of this group of insects.

Thesis (Ph. D.)--University of Michigan, 1929. / Without thesis note. Bibliography: p. 305-310.

Com o objetivo de incentivar novos pesquisadores e empreendedores da área de controle biológico de pragas, foi realizada uma série de experimentos voltados à qualidade da produção massal do agente biológico Chrysoperla externa (NEUROPTERA; CHRYSOPIDAE). Estudaram-se aspectos biológicos desta espécie, com o interesse de se delinear um sistema de produção eficiente, baseado em 7 módulos de gaiolas de adultos, em que se coletam ovos por 49 dias. Para se manter uma produtividade constante, esses módulos são montados com uma diferença de tempo de 7 dias entre eles. Outras técnicas e análises de custos de produção também estão descritas. Realizou-se ainda um estudo do efeito de diferentes doses do anticontaminante nipagin, sobre a produtividade dos adultos, evidenciou que sua utilização em biofábricas de C. externa não traz benefícios significativos. Com esse trabalho é possível produzir ovos de C. externa com maior eficiência. / This research deals with biological aspects and their influence on the quality of Chrysoperla externa produced in laboratory. The system of production was based on seven modules of adult cages from which one collected eggs during 49 days. Such modules must be prepared at each seven days to provide a constant flowing production. Other techniques and analysis of costs of production are described as well. A study of different concentrations (dosis) of the anticontaminant nipagin on C. externa adults indicated that its use showed no significant benefits for the production of this predator.

Com o objetivo de incentivar novos pesquisadores e empreendedores da área de controle biológico de pragas, foi realizada uma série de experimentos voltados à qualidade da produção massal do agente biológico Chrysoperla externa (NEUROPTERA; CHRYSOPIDAE). Estudaram-se aspectos biológicos desta espécie, com o interesse de se delinear um sistema de produção eficiente, baseado em 7 módulos de gaiolas de adultos, em que se coletam ovos por 49 dias. Para se manter uma produtividade constante, esses módulos são montados com uma diferença de tempo de 7 dias entre eles. Outras técnicas e análises de custos de produção também estão descritas. Realizou-se ainda um estudo do efeito de diferentes doses do anticontaminante nipagin, sobre a produtividade dos adultos, evidenciou que sua utilização em biofábricas de C. externa não traz benefícios significativos. Com esse trabalho é possível produzir ovos de C. externa com maior eficiência. / This research deals with biological aspects and their influence on the quality of Chrysoperla externa produced in laboratory. The system of production was based on seven modules of adult cages from which one collected eggs during 49 days. Such modules must be prepared at each seven days to provide a constant flowing production. Other techniques and analysis of costs of production are described as well. A study of different concentrations (dosis) of the anticontaminant nipagin on C. externa adults indicated that its use showed no significant benefits for the production of this predator.

A citricultura orgânica Brasileira tem se destacado no mercado internacional no tocante às exportações de suco e concentrado de laranja, polpa peletizada para alimentação animal e óleos para indústria química e farmacêutica. A calda sulfocálcica vem sendo empregada como produto alternativo para a agricultura orgânica em razão da sua baixa toxicidade se comparada aos inseticidas sintéticos frequentemente usados na agricultura convencional. O presente estudo teve como objetivo avaliar o desempenho de C. externa como predadora de T. citricida em citros tratado com calda sulfocálcica em diferentes concentrações. Especificamente, foi investigada a dinâmica de predação de C. externa sobre T. citricida considerando a inclusão de predadores e presas em citros tratados com calda sulfocálcica. A resposta funcional de C. externa sobre T. citricida também foi analisada com base na teoria ecológica e aplicação de funções não-lineares. A proposta de um modelo matemático para descrever a ação da calda sulfocálcica sobre o sistema trófico foi também incluída no estudo. Dos resultados encontrados pode-se concluir que a concentração de enxofre em 6000 g/mL pode ser prejudicial ao desenvolvimento do crisopídeo, diminuindo significativamente a viabilidade da população. Entretanto, a calda sulfocálcica não altera a capacidade predatória do crisopídeo. No que diz respeito à T. citricida, não parece ser atingida pelas formulações da calda sulfocálcica e também não parece ser presa atrativa ao predador. A regressão logística polinomial indicou resposta funcional do tipo II, caracterizada por uma assíntota que exibe saturação em densidades mais elevadas, tanto para o experimento com a aplicação de calda sulfocálcica quanto para a testemunha. O processo de modelagem resultou em equações em tempo discreto para avaliar o efeito da concentração da calda sulfocálcica sobre a dinâmica predador-presa das espécies envolvidas no estudo. Os resultados obtidos pelas simulações descrevem adequadamente o que foi encontrado nos experimentos, o que sugere boa acurácia dos modelos ao problema investigado. Este tipo de resultado motiva a continuidade dos estudos com foco em modelagem, com vistas ao aperfeiçoamento do modelo. / The Brazilian organic citrus has distinguished itself in the international market as regards to exports of concentrated orange juice, pelletized pulp for animal feeding and oils for chemical and pharmaceutical industry. The lime sulphur has been employed as an alternative product for organic agriculture because of its low toxicity, when compared to synthetic insecticides commonly used in conventional agriculture. This study aimed to evaluate the performance of Chrysoperla externa on its prey Toxoptera citricida in citrus, where lime sulfur was applied in three different concentrations. Specifically, the predation dynamics of C. externa on T. citricida was investigated considering the inclusion of predators and prey in citrus previously treated with lime sulfur. The functional response of C. externa on T. citricida was analyzed based on ecological theory relying on the use of non-linear functions. A mathematical model to describe the action of lime sulphur on the trophic system was also proposed. The results suggest that the concentration of sulphur in 6000 g/mL can be detrimental to the development of green lacewing, significantly reducing the viability of its population. The lime sulphur does not change the predatory ability of the green lacewing. With respect to T. citricida does not seem to be attained by lime sulfur and to show enough attractiveness for the predators larvae development. Polynomial logistic regression indicated type II functional response, which is characterized by an asymptote that exhibits saturation in higher densities for both lime sulphur applied citrus and control citrus. The modeling process resulted in discrete-time equations to evaluate the effect of concentration of lime sulphur on the dynamics of the system. The results obtained by simulations are suitable description for the results experimental found. This suggest a good accuracy of the models to the problem. This kind of result encourage new studies focused on modeling and improvement of the model.