Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 23 for “"Heteroptera"”.
-
Effects of water mite parasitism on Cenocorixa spp. (Heteroptera: Corixidae)
The purpose of this study was to understand the mechanisms by which parasitic water mites exclude one species of sympatric water boatmen from low salinity, while a sibling species survives. Attachment of the larval water mite Eylaiseuryhalina Smith was studied in the laboratory on two species off …
-
Experimental studies on the reproductive biology of the Waterstrider, Gerris buenoi (Heteroptera: Gerridae)
In a series of enclosure experiments (11 over 3 years) on the waterstrider Gerris buenoi, I demonstrated that food resources were limited by both intra- and interspecific competition in the field. Over a 20 fold range of egg production rates in control enclosures, food addition and interspecific …
-
Contribuição ao estudo comparativo da genitália externa em sub-famílias de Reduviidae (Hemiptera-Heteroptera)
Five representatives of the Reduviid sub-families (Microtominae, Piratinae, Ectrichodiinae, Reduvinae and Triatominae), were studied with special reference to the morphology of the male and female genitalia. Drawings were made of the Terminalia from various angles (dorsal, ventral and lateral) to …
-
Interações entre o predador Podisus nigrispinus (Heteroptera: Pentatomidae) e o parasitóide Palmistichus elaeisis (Hymenoptera: Eulophidae)
… intraguilda entre Podisus nigrispinus (Dallas) (Heteroptera: Pentatomidae) e imaturos de Palmistichus elaeisis Delvare & LaSalle (Hymenoptera: Eulophidae) e o efeito desses fenômenos na biologia desses inimigos naturais. No capítulo I pupas de Thyrinteina arnobia (Stoll) (Lepidoptera: …
-
Revisão das espécies de Belostoma Latreille, 1807 (Insecta: Heteroptera: Belostomatidae) ocorrentes no Sudeste do Brasil
The species of the Neotropical genus Belostoma Latreille, 1807 from southeastem Brazil are reviewed for the first time. ln this work the following 22 species were recorded and redescribed: Belostoma anurum (Herrich-Schãffer), B. aurivi/lianum (Montandon), B. bergi (Montandon), B. bosqi De Carlo, B. …
-
The Systematics and Phylogeny of the Plant Bug Tribes Felisacini and Monaloniini (Insecta: Heteroptera: Miridae: Bryocorinae)
… within the subfamily Bryocorinae (Insecta: Heteroptera: Miridae: Dicyphini) that have been considered to be sister-taxa. Prior to my study they comprised 41 genera and about 250 species, mostly in the palaeotropics. There has been no modern testing of the monophyly of these subtribes and …
-
Evaluation of injury and management strategies for stink bugs (Heteroptera: Pentatomidae) on cotton, Gossypium hirsutum L.
The effects of brown stink bug, Euschistus servus (Say), and southern green stink bug, Nezara viridula (L.), feeding on pre-flowering, flowering, and senescing cotton, Gossypium hirsutum L., plants were evaluated in field studies. Vegetative stage seedlings and flower buds (squares) were not …
-
The adaptive significance of multiple mating by males in the polygynandrous waterstrider Aquarius remigis (Heteroptera: Gerridae)
In polygynandrous species, sperm competition and female post-insemination processes may influence male paternity success. Hence, insemination (i.e. successful sperm transfer) may not guarantee reproductive success for the male. Using a variation of Parker's (1970) sterile (irradiated) male …
-
Behavioural responses of cocoa mirids, Sahlbergella singularis Hagl and Distantiella theobroma Dist. (Heteroptera: Miridae), to sex pheromones.
… Hagl and Distantiella theobroma (Dist) (Heteroptera: Miridae), are major insect pests of cocoa, a valuable crop in West Africa. Their control by the application of insecticides is problematic in terms of safety and cost. Therefore, this study was undertaken to determine the potential for …
-
Estratégias comportamentais na escolha sexual e predação de Podisus nigrispinus (Heteroptera: Pentatomidae) que incrementam seu desempenho reprodutivo
O percevejo predador Podisus nigrispinus (Dallas) é o Asopinae mais estudado na América do Sul e possui potencial em controlar pragas agrícolas e florestais em programas de criação e liberação massal no Brasil. Nas últimas décadas, questões relacionadas à fisiologia reprodutiva e seletividade a …
-
The Ambrysus Stal (Heteroptera : Naucoridae) of Mexico : revision of Ambrysus (Syncollus) La Rivers and species groups of Ambrysus (Ambrysus)
… or saucer bugs. The New World genus Ambrysus (Heteroptera: Naucoridae) includes two subgenera in Mexico: Ambrysus (Syncollus) La Rivers and Ambrysus (Ambrysus) Stal. Syncollus includes nine species with mostly Neotropical distributions. The subgenus Syncollus was reviewed and the status of the …
-
Descrição de quatro novas espécies de Belostoma Latreille, 1807 e análise cladística do grupo B. plebejum sensu Nieser, 1975 (Insecta: Heteroptera: Belostomatidae)
Belostoma plebejum species group sensu Nieser comprises seven extant small species of giant water bugs, currently reported from Honduras to southern South America. The main goals of this thesis were to conduct a cladistic analysis to test the monophyly of B. plebejum species group and to develop a …
-
Phenology and Population Dynamics of the Squash Bug, Anasa Tristis
… of the squash bug, Anasa tristis DeGeer (Heteroptera: Coreidae), was constructed and used to predict the effect of various management options and environmental factors on this pest of cucurbit crops. The life-history data required for the model were obtained by field and laboratory …
-
Dead bugs do tell tales: implications of a new fossil assassin bug (Heteroptera: Reduviidae) for the evolutionary history and systematics of an extant lineage
… in which the divergence of Reduvioidea from Heteroptera was suggested to be 344 Ma. The potential problems with this and previous divergence estimates are discussed. To supplement and better justify the description and placement of the new taxon, an annotated taxonomic catalog of the fossil …
-
Chemical Ecology of Defense Compounds in Anasa Species (Heteroptera: Coreidae) and Volatile Attractants for Diabrotica Species (Coleoptera: Chrysomelidae) (Attractants, Glands, Corn Rootworms, Electron Microscopy, Squash Bug)
Two separate investigations of insect chemical ecology were conducted. The first study elucidated the ultrastructure of the metathoracic scent glands of Anasa tristis and the chemical composition of secretions from the metathoracic glands of A. tristis and A. armigera and the abdominal glands of A. …
-
A dieta influencia? Ultraestrutura das células digestivas do intestino médio de hemípteros (Insecta: Hemiptera) com diferentes hábitos alimentares
… relações Auchenorrhyncha filogenéticas e são Heteroptera. estudadas: Estes Coleorrhyncha, insetos apresentam diversificados hábitos alimentares que variam dentre a fitofagia, zoofagia, dentritivoria, hematofagia e onivoria. Devido a esta variedade de hábitos e o conhecimento da filogenia dos …
-
Oviposition Site Selection By Mosquitoes: Predator-Released Kairomones And Responses To Different Taxa
… and avoid habitats with predaceous backswimmers (Heteroptera: Notonectidae), and certain species of fish, including Gambusia affinis. For my thesis I focused on mosquitoes of the genus Culex, and how they responded solely to the presence of kairomones (chemicals emitted by an organism and detected …
Page 1 of 2