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Histochemical investigations showed that Romanomermis culicivorax in experimentally infected larvae of Aedes aegypti (L.) were found to accumulate storage products, primarily in the trophosome, from the fourth day of parasitic development onwards. Lipids constitute the predominant storage metabolite...
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Knowledge of the physiological processes involved in the relationships between insects and their mermithid parasites is reviewed with respect to the effects of mermithids on host physiology, effects of host physiology on mermithids, and the physiology of nematodes themselves. Most physiological rese...
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Insects of both agricultural and medical and veterinary importance are included in this review of control of insects by nematodes. Information is collected on entomophilous nematodes that are of potential use for the regulation of insect populations, and recent progress made in investigations design...
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Histochemical studies in the laboratory in Canada on field-collected larvae of Prosimulium fuscum Syme & Davies (mixtum fuscum) revealed no significant differences in the endocrine activity of larvae infected with mermithid nematodes and healthy larvae (of similar body dimensions). In the case o...
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The kinetic properties of two metabolic enzymes, glucose-6-phosphate dehydrogenase and hexokinase, were studied in 4 strains of entomopathogenic nematodes that had been recycled for two years at various temperatures: Steinernema feltiae NF strain, S. feltiae Umea strain, S. carpocapsae. All strain, ...
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Eggs of Delia radicum 24-28 h old were treated with the same doses of 4 insect growth regulators. Diflubenzuron significantly reduced egg hatch as compared with untreated and solvent-treated controls. Methoprene had a delayed effect, preventing hatching of adults from pupae that subsequently develop...
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Distribution of caudal papillae in adult Romanomermis culicivorax was determined by scanning electron microscopy. Ninety-eight caudal papillae, each containing one pore, were present in males but absent in females. Papillae were arranged in 3 longitudinal rows, one ventral and 2 ventrolateral; the m...
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In 1973-75, larval blackflies were sampled for mermithid nematodes in 83 streams in Newfoundland, Canada. Prosimulium mixtum/fuscum and Simulium venustum were the predominant hosts of Neomesomermis flumenalis but rates of infection in late-instar larvae were generally low (4.3 plus or minus 0.7% and...
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Haemolymph from larvae of Simulium venustum Say collected in Canada was tested for the presence of 49 amino acids and other ninhydrin-positive compounds. The concentrations found are listed and discussed. In connection with the possible control of S. venustum by parasitic Mermithids, it is pointed o...
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In vitro growth of R. culicivorax preparasites was monitored in 2 culture media under differing conditions of crowding. Crowding was more important that the character of the medium itself in stimulating in vitro growth. The glycogen, protein, and lipid content of nematodes that had developed after 5...
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Greenhouse trials were conducted to evaluate the effect of treating adult and egg stages of Choristoneura fumiferana with Insegar, a water-based commercial formulation of the juvenile hormone analogue fenoxycarb, or with water (controls) at droplet sizes and densities comparable to those achieved th...
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