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Showing 1 to 20 of 33 for “"Cockroaches"”.
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Studies on the Transmission of Helminth Ova by Cockroaches
Made available in DSpace on 2014-12-04T22:46:15Z (GMT). No. of bitstreams: 1 6104410.pdf: 3310207 bytes, checksum: 7524a72d7bf42837dbbd7fd5083be6e4 (MD5) Previous issue date: 1961
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The response of German cockroaches to commercial toxic baits and their potential to develop resistance
Multiple strains of German cockroaches, Blattella germanica, were exposed to four different toxic baits. The baits used were Roach Ender, Whitmire gel bait (not commercially available), Stapleton’s Magnetic Roach Food and Baygon. For each bait, strains varied in respect to bait consumption, percent …
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Some Chemical Characteristics of Neuroactive Agents in the Blood of Ddt-Poisoned Cockroaches, Crayfish and Crabs
Made available in DSpace on 2014-12-05T21:34:01Z (GMT). No. of bitstreams: 1 6100141.pdf: 1922500 bytes, checksum: 27c84c953b594b0fd2c057a9ee84b62a (MD5) Previous issue date: 1960
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Effects Of Thermal Acclimation On The Critical Thermal Maxima Of The Tropical Cockroaches: Blaptica Dubia, Eublaberus Posticus And Blaberus Discoidalis (blaberidae)
… first instar nymphs of three species of tropical cockroaches: Blaptica dubia, Eublaberus posticus, and Blaberus discoidalis. Adult cockroaches were acclimated to temperatures of 10°C, 15°C, 20°C, 25°C, 31°C and 37°C for a period of seven days. Blaptica dubia was the only species to survive the …
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Aspects of dispersal and population structure of Blattella germanica (L.) in field habitats and attitudes concerning aesthetic injury levels
… field collected populations of adult German cockroaches with a unique number, and 2) releasing strains of genetically marked German cockroaches to observe nymphal movement. Movement by adult cockroaches was studied by marking 3299 field collected German cockroaches in eight apartments. …
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The ecology and management of the oriental cockroach Blatta orientalis L. (Orthoptera:Blattidae) in the urban environment
… complexes in Virginia, 90% had seen oriental cockroaches, 60% considered one oriental cockroach indoors to be a problem, and 77% had taken steps to control these cockroaches. Monitoring oriental cockroach populations indicated when and where treatment would be necessary to reduce cockroach …
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In vivo studies of suspected mechanisms of DDT-resistance in Blattella germanica (L.)
… German cockroach, Blattella germanica (L.). The cockroaches were exposed to various DDT treatments for intervals ranging from 3 to 72 hours. DDT and its metabolites were identified and quantitated in external, internal, and excreta fractions using gas-liquid chromatography. The identifications …
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Obstacle Navigation Decision-Making: Modeling Insect Behavior for Robot Autonomy
… a reflex is insufficient. Animals such as cockroaches depend on exploration, and the complexity of their strategies may inspire robotic approaches. After many hours of cockroach trials with and without goals (darkened shelters) and further experiments in analysis, we extracted a state-based …
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Application of insecticides to control the German cockroach, Blattella germanica (L.)
… of cypermethrin treated glass plates. RHA-strain cockroaches picked up significantly (P < 0.05) more cypermethrin than VPI-strain in 5 min, but there was no difference when exposed for 30 movement units. Knockdown time was significantly correlated (P < 0.05) to estimated dose transfer in 0.025 …
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Harborage limitation and habitat isolation for German cockroach control
… were used to survey cockroach populations, trap cockroaches for marking and population census, and detect cockroaches that moved from the original capture sites. Focus apartments (ie. apartments with large cockroach populations) were located and used for the two studies. Five focus apartments …
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Catabolic substrate utilization patterns: varying humidity and dietary regimens in the American cockroach Periplaneta americana (L.) (Dictyoptera: Blattidae)
… from the radiolabel experiments suggested that cockroaches deprived of food, but provided water to drink, change their metabolic substrate utilization pattern from initial catabolic substrates such as carbohydrates to lipid-based substrates. Also, cockroaches deprived of either water (FO) or …
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Group formation and dispersal in the German cockroach, Blattella germanica (L.) (Dictyoptera: Blattellidae)
… behavior of small mixed populations of German cockroaches. Of particular interest was the effect of female cockroaches on the behavior of the group, particularly the group formation within a harborage and the dispersal from a harborage. The effect of females was looked at with respect to female …
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Inheritance of resistance to lindane in the German cockroach, Blattella germanica (L.)
… of lindane to the following populations ot cockroaches: a) lindane.resistant and non-resistant strains, b) the F1 and F2 progeny of reciprocal crosses between the two parental strains, c) the F1 and F2 progeny of backcrosses between the reciprocal cross F1 males. and resistant and …
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La comunicazione chimica in Blattaria: contributo al miglioramento della lotta
… the behavioral responses of Italian sinanthropic cockroaches to semiochemicals and food attractants, for the purpose of evaluating a possible practical application and of contributing to the improvement of control techniques. Behavioral and morphological studies have been carried out on Supella …
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Saproxylic Insights: Unveiling Gut Microbial Dynamics in Forest Floor Invertebrates and Their Frass in the Tallaganda Region, NSW
… saproxylic velvet worms, saprophagous wood cockroaches, funnel web spiders, and their immediate environment, the frass. All individuals used in this study were found in the Tallaganda Region of New South Wales, Australia. This study utilized the V4-V5 region of the 16S rRNA gene sequences to …
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Evaluation of chitinous materials as a feed for ruminants
… by in vivo rumen fermentation. Samples of cockroaches, grasshoppers, shrimp shells, crabmeal, and purified chitin were placed in the rumen of fistulated steers. Average rumen solubility (weight loss from a nylon bag) of 66.5. 32.0, 17.4, 35.7, and 21.5%, respectively, were observed. …
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Exploring the Evolution and Taxonomy of Evaniidae (Hymenoptera), a Charismatic and Enigmatic Family of Insects
… develop as egg predators within the oothecae of cockroaches (Dictyoptera), and the family follows a largely tropical distribution. Despite myriad fascinating biological attributes (mimicry complexes, wing venation heterogeneity, unexplored biogeographical patterns) the systematics of these wasps …
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Sublethal vapor-induced responses of the German cockroach to commercial pesticide formulations
… (L). An apparatus was designed to expose test cockroaches to vapors from commercial pesticide formulations. Insecticide vapor-induced dispersal responses were recorded during a two hour period from different strains that had been allowed to acclimate to a harborage. The dispersal response of …
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Population biology and ecology and of Periplaneta americana (L.) in the urban environment
… of a simulated population of caged American cockroaches maintained in a basement environment confirmed that their foraging activity was seasonal. Foraging seasonality characterizes the seasonal pest status of this cockroach species in the temperate urban environment. Therefore, seasonally …
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Ethologie des fourmis Eutetramorium mocquerysi (Emery, 1900) Hymenoptera, Formicidae, en laboratoire
… of insects (larvae of coleoptera, locusts, cockroaches. ..).All social insects have several morphoanatomic castes (worker dominating, workers of high ranks: being able to become dominating, workers of low ranks: veritable worker,and the ant male). As with all social insects, the life of the …
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