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2022

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Articles 421 - 429 of 429

Full-Text Articles in Entomology

Spontaneous Parthenogenesis In The Parasitoid Wasp Cotesia Typhae: Low Frequency Anomaly Or Evolving Process?, Claire Capdevielle Dulac, Romain Benoist, Sarah Paquet, Paul André Calatayud, Julius Obonyo, Laure Kaiser, Florence Mougel Jan 2022

Spontaneous Parthenogenesis In The Parasitoid Wasp Cotesia Typhae: Low Frequency Anomaly Or Evolving Process?, Claire Capdevielle Dulac, Romain Benoist, Sarah Paquet, Paul André Calatayud, Julius Obonyo, Laure Kaiser, Florence Mougel

All Peer-Reviewed Publications

Hymenopterans are haplodiploids and unlike most other Arthropods they do not pos-sess sexual chromosomes. Sex determination typically happens via the ploidy of individ-uals: haploids become males and diploids become females. Arrhenotoky is believed to be the ancestral reproduction mode in Hymenopterans, with haploid males produced parthenogenetically, and diploid females produced sexually. However, a number of transitions towards thelytoky (diploid females produced parthenogenetically) have appeared in Hymenopterans, and in most cases populations or species are either totally arrhenotok-ous or totally thelytokous. Here we present the case of Cotesia typhae (Fernandez-Triana), a Braconidae that produces parthenogenetic females at a low frequency. The …


Safety, Regulatory And Environmental Issues Related To Breeding And International Trade Of Edible Insects In Africa, S. Niassy, E. R. Omuse, N. Roos, A. Halloran, J. Eilenberg, J. P. Egonyu, C. Tanga, F. Meutchieye, R. Mwangi, S. Subramanian, R. Musundire, P. O.Y. Nkunika, J. P. Anankware, J. Kinyuru, A. Yusuf, S. Ekesi Jan 2022

Safety, Regulatory And Environmental Issues Related To Breeding And International Trade Of Edible Insects In Africa, S. Niassy, E. R. Omuse, N. Roos, A. Halloran, J. Eilenberg, J. P. Egonyu, C. Tanga, F. Meutchieye, R. Mwangi, S. Subramanian, R. Musundire, P. O.Y. Nkunika, J. P. Anankware, J. Kinyuru, A. Yusuf, S. Ekesi

All Peer-Reviewed Publications

Insect breeding or farming for food and feed is an emerging enterprise that can address the ever-growing demand for protein and curb high unemployment rates in Africa and beyond. However, for the sector to prosper, its value chain needs to be regulated to ensure sustainability and safety for consumers and the environment. Although a few African countries, such as Kenya, Uganda and Rwanda, have promulgated standards on the use of insects as food and feed, greater efforts are needed in other countries, and relevant policies governing the sector need to be formulated. All over the globe, attention to the regulation …


Interactions Between Integrated Pest Management, Pollinator Introduction, And Landscape Context On Avocado Persea Americana Productivity, Nadia K. Toukem, Samira A. Mohamed, Abdullahi A. Yusuf, H. Michael G. Lattorff, Robert S. Copeland, Thomas Dubois Jan 2022

Interactions Between Integrated Pest Management, Pollinator Introduction, And Landscape Context On Avocado Persea Americana Productivity, Nadia K. Toukem, Samira A. Mohamed, Abdullahi A. Yusuf, H. Michael G. Lattorff, Robert S. Copeland, Thomas Dubois

All Peer-Reviewed Publications

Pest management and insect pollination are important services that support crop production but are most often studied in isolation in cropping systems. Avocado Persea americana Mill. is an economically important crop in East Africa, which suffers from pest threats and potential drawbacks of the global pollinator crisis. The integration of pest and pollinator management is a growing research trend as a potential solution for sustainable crop production with minimum adverse effects on the environment and biodiversity. This study assessed potential interactions between landscape context, honeybee Apis mellifera L. introduction and integrated pest management (IPM) on avocado pests Bactrocera dorsalis (Hendel) …


Determinants Of Profitability Of Black Soldier Fly Farming Enterprise In Kenya, K. V. Mutuku, A. W. Mukhebi, M. A. Orinda, C. M. Tanga Jan 2022

Determinants Of Profitability Of Black Soldier Fly Farming Enterprise In Kenya, K. V. Mutuku, A. W. Mukhebi, M. A. Orinda, C. M. Tanga

All Peer-Reviewed Publications

Black soldier fly (BSF) farming is emerging as a new farm enterprise in Kenya poised to provide high-quality and affordable alternative protein sources for animal feed production. Consequently, commercialisation and adoption require farmers to understand if the enterprise is economically viable. This study sought to assess the determinants of profitability of the BSF farm enterprise. A census survey was conducted whereby 34 well-established smallholder BSF farmers were interviewed. A double log regression analysis on the determinants of profitability of the BSF farm enterprise was done. The results revealed that 93.6% of the variation in enterprise gross margin was explained by …


The Combat Project: Controlling And Progressively Minimizing The Burden Of Vector-Borne Animal Trypanosomosis In Africa, Alain Boulangé, Veerle Lejon, David Berthier, Sophie Thévenon, Geoffrey Gimonneau, Marc Desquesnes, Samuel Abah, Prudenciène Agboho, Kalinga Chilongo, Tsegaye Gebre, Assane Gueye Fall, Dramane Kaba, Stefan Magez, Daniel Masiga, Enock Matovu, Aldjibert Moukhtar, Luis Neves, Pamela A. Olet, Soumaïla Pagabeleguem, William Shereni, Brice Sorli, Moeti O. Taioe, María Teresa Tejedor Junco, Rehab Yagi, Philippe Solano, Giuliano Cecchi Jan 2022

The Combat Project: Controlling And Progressively Minimizing The Burden Of Vector-Borne Animal Trypanosomosis In Africa, Alain Boulangé, Veerle Lejon, David Berthier, Sophie Thévenon, Geoffrey Gimonneau, Marc Desquesnes, Samuel Abah, Prudenciène Agboho, Kalinga Chilongo, Tsegaye Gebre, Assane Gueye Fall, Dramane Kaba, Stefan Magez, Daniel Masiga, Enock Matovu, Aldjibert Moukhtar, Luis Neves, Pamela A. Olet, Soumaïla Pagabeleguem, William Shereni, Brice Sorli, Moeti O. Taioe, María Teresa Tejedor Junco, Rehab Yagi, Philippe Solano, Giuliano Cecchi

All Peer-Reviewed Publications

Vector-borne diseases affecting livestock have serious impacts in Africa. Trypanosomosis is caused by parasites transmitted by tsetse flies and other blood-sucking Diptera. The animal form of the disease is a scourge for African livestock keepers, is already present in Latin America and Asia, and has the potential to spread further. A human form of the disease also exists, known as human African trypanosomosis or sleeping sickness. Controlling and progressively minimizing the burden of animal trypanosomosis (COMBAT) is a four-year research and innovation project funded by the European Commission, whose ultimate goal is to reduce the burden of animal trypanosomosis (AT) …


Tick (Acarina: Ixodidae) Species And Life Stages Collected From Arkansas Wild Pigs, Allen Szalanski Jan 2022

Tick (Acarina: Ixodidae) Species And Life Stages Collected From Arkansas Wild Pigs, Allen Szalanski

Entomology and Plant Pathology Faculty Publications and Presentations

Wild pigs (Sus scrofa L.; Artiodactyla: Suidae) are found in every Arkansas county and are spreading throughout the southeastern USA. This is a public and animal health concern because wild pigs occupy the same geographical areas as humans and livestock, and can harbor over 45 animal pathogens and parasites. Little research has been conducted on the tick species parasitizing Arkansas wild pigs. Tick collections for this study were taken from feral S. scrofa trapped for control purposes by Arkansas Game and Fish Commission, USDA APHIS Wildlife Services, and University of Arkansas Cooperative Extension Service personnel. Between Feb 2019 and Jan …


Association Between Habitat And The Genetic Diversity Of The Brown-Belted Bumblebee (Bombus Griseocollis) In The Agricultural Landscape Across Northeast Iowa, Clarissa Elizabeth Bruns Jan 2022

Association Between Habitat And The Genetic Diversity Of The Brown-Belted Bumblebee (Bombus Griseocollis) In The Agricultural Landscape Across Northeast Iowa, Clarissa Elizabeth Bruns

Dissertations and Theses @ UNI

Wild bumblebees (Hymenoptera: Apidae) are key pollinators in natural ecosystems and major contributors to pollination in agriculture. Despite this, numerous bee species are in decline from introduced pathogens, pesticides, and habitat fragmentation. In the Midwestern United States, the land is dominated by agricultural landscape, and farming practices result in limited floral resources and frequently disturbed nesting grounds for bee species. In this thesis, I examine the genetic diversity between and within populations of brown-belted bumblebee (Bombus griseocollis) across northeast Iowa and test for population genetic structure between reconstructed prairies within 3 years of establishment and prairies >10 years …


Identification Of Sesquiterpenes In Wild Tomato Accessions With Activities Against The Potato Aphid And Their Tissue-Specific Engineering In Cultivated Tomato, Fumin Wang Jan 2022

Identification Of Sesquiterpenes In Wild Tomato Accessions With Activities Against The Potato Aphid And Their Tissue-Specific Engineering In Cultivated Tomato, Fumin Wang

Graduate Theses, Dissertations, and Problem Reports (ETD)

The potato aphid (Macrosiphum euphorbiae Thomas) poses a serious problem in the commercial production of horticultural crops including tomato, since it causes damage by stylet feeding and the transmission of viruses for which it serves as the vector. Application of conventional pesticides being the fundamental tactic in the control of the aphid is increasingly considered insufficient and problematic due to emerging pest resistances and biosafety issues, highlighting the continuing need to develop new efficient and sustainable approaches. Alternatively, glandular trichomes of plants are well-known epidermal hairy tissues producing various secondary metabolites that involve in plant-insect interactions, while the terpene …


Behavior And Chemical Signals As Markers Of Colony Identification In Argentine Ants (Linepithema Humile), Stephanie A. Rohrbach Jan 2022

Behavior And Chemical Signals As Markers Of Colony Identification In Argentine Ants (Linepithema Humile), Stephanie A. Rohrbach

College of Graduate Studies: Theses & Dissertations

Argentine ants, Linepithema humile, are a highly successful invasive species around the globe and are especially prominent in states such as California and the southeastern United States. L.humile have a unique form of unicoloniality, called “supercolonies”. L. humile can detect colonymates through scent markers in their outer cuticle. With these chemical markers, ants will exhibit high aggression if they smell different from one another. In our study, we performed aggression assays among ten different nest sites and analyzed their CHCs through gas chromatography mass spectrometry, or GC-MS, analysis. For our behavior results, while within-nest interactions displayed low aggression as …