Browsing Journal Articles by Author "Otieno, Mark"
Now showing items 1-14 of 14
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Combining Host Plant Resistance, Selective Insecticides, and Biological Control Agents for Integrated Management of Tuta absoluta
Nderitu, Peris W; Jonsson, Mattias; Arunga, Ester E.; Otieno, Mark; Muturi, John J.; Wafula, Geoffrey O. (Hindawi, 2020-08)Combination of pest management strategies that minimize pesticide use and conserve natural enemies is important for a sustainable environment. Overreliance on synthetic insecticides in the management of Tuta absoluta has ... -
Comparative Trapping Efficiency to Characterize Bee Abundance, Diversity, and Community Composition in Apple Orchards
Joshi, N.K.; Leslie, Timothy; Rajotte, Edwin G.; Kammerer, Melaine A.; Otieno, Mark; Biddinger, David J. (Oxford University Press, 2015-07)Bees are important pollinators of numerous crops, and monitoring their abundance and diversity in commercial agricultural ecosystems is of increasing importance due to pollinator declines. In season-long field studies ... -
Enhancing legume crop pollination and natural pest regulation for improved food security in changing African landscapes
Otieno, Mark; Dewentera, Ingolf S.; Potts, Simon G.; Kinuthia, Wanja; Kasina, Muo J.; Garrattb, Michael P.D. (Elsevier, 2020-09)Legumes are important crops for food security, consumed by millions of people especially in Africa where they are an essential protein source and provide key vitamins and minerals. Most legumes depend on insect pollination ... -
Flower visitors of Streptocarpus teitensis: implications for conservation of a critically endangered African violet species in Kenya
Otieno, Mark; Josh, Neelendra; Rutschmann, Benjamin (PeerJ, 2021-01)Background: The African violets are endangered plant species restricted mainly to the Eastern Arc Mountains biodiversity hotspots in Kenya and Tanzania. These plants grow well in shaded environments with high humidity. ... -
A global quantitative synthesis of local and landscape effects on wild bee pollinators in agroecosystems
Kennedy, Christina M.; Lonsdorf, Erick; Neel, Maile C.; Williams, Neal M.; Ricketts, Taylor H.; Winfree, Rachael; Bommarco, Riccardo; Brittain, Claire; Burley, Alana L.; Cariveau, Daniel; Carvalheiro; Chacoff, Natacha P.; Cunningham, Saul A.; Danforth, Bryan N.; Dudenhoffer, Jan-Hendrick; Elle, Elizabeth; Gaines, Hanna R.; Garibaldi, Lucas A.; Gratton, Claudio; Holzschuh, Andrea; Isaacs, Rufus; Javorek, Steven K.; Jha, Shalene; Klein, Alexandra M.; Krewenka, Kristin; Mandelik, Yael; Mayfield, Margaret M.; Morandin, Lora; Neame, Lisa A.; Otieno, Mark; Park, Mia; Potts, Simon G.; Rundlof, Maj; Saez, Agustin; Steffan-Dewenter, Ingolf; Taki, Hisatomo; Viana, Blandina F.; Westphal, Catrin; Wilson, Julianna K.; Greenleaf, Sara S.; Kremen, Claire; Carvalheiro, Luisa G. (Blackwell Publishing Ltd, 2013)Bees provide essential pollination services that are potentially affected both by local farm management and the surrounding landscape. To better understand these different factors, we modelled the relative effects of ... -
A global synthesis of the effects of diversified farming systems on arthropod diversity within fields and across agricultural landscapes. Global Change Biology
Lichtenberg, E.; Otieno, Mark; Christina, Kennedy M.; Kremen, Claire; Batary, Peter; Berendse, Frank; Bommarco, Riccardo; Bosque-Perez, Nilsa A.; Carvalheiro, Luısa G.; Snyder, William E.; Williams, Neal M. (Wiley Online Library, 2017-03)Agricultural intensification is a leading cause of global biodiversity loss, which can reduce the provisioning of ecosystem services in managed ecosystems. Organic farming and plant diversification are farm management ... -
Local and landscape effects on bee functional guilds in pigeon pea crops in Kenya
Otieno, Mark; Sidhu, Sheena C.; Woodcock, Ben A.; Wilby, A.; Ioannis, N.; Mauchline, Alice L.; Gikungu, Mary W.; Potts, Simon G. (Springer, 2015-07)Pollinators face many challenges within agricultural systems due to landscape changes and intensification which can affect resource availability that can impact pollination services. This paper examines pigeon pea pollination ... -
Local management and landscape drivers of pollination and biological control services in a Kenyan agro-ecosystem
Otieno, Mark; Woodcock, Ben A.; Wilby, Andrew; Vogiatzakis, Ioannis N.; Mauchline, Alice L.; Gikungu, Mary W.; Potts, Simon G. (Elsevier, 2011)Arthropods that have a direct impact on crop production (i.e. pests, natural enemies and pollinators) can be influenced by both local farm management and the context within which the fields occur in the wider landscape. ... -
Pollination Ecology of Desmodium Setigerum (Fabaceae) in Uganda; Do Big Bees Do It Better?
Stanley, Dara A.; Otieno, Mark; Steijven, Karin; Berlin, Emma Sandler; Piironen, Tiina; Willmer, Pat; Nuttman, Clive (2016-08)Explosive pollen release is documented in many plant families, including the Fabaceae. Desmodium setigerum E. Mey (Fabaceae) is a perennial herb with single trip explosive pollen release found in eastern Africa, and the ... -
Proximity to Woodland and Landscape Structure Drives Pollinator Visitation in Apple Orchard Ecosystem
Neelendra, Joshi K.; Otieno, Mark; Edwin, Rajotte G.; Shelby, Fleischer J.; David, Biddinge J. (Crossmark, 2016-04)Landscapes of farms and adjacent areas are known to influence abundance of various arthropods such as pollinators in commercial agricultural ecosystems. In this context, we examined the effect of heterogeneous landscapes ... -
Tea breaks: how flower visitors can benefit from unplanned floral buffer strips in a Tanzanian tea plantation
Norfolk, Olivia; Sadiki, Lotha Laisser; Broughton, Brittanie; Otieno, Mark; Nuttman, Clive (Blackwell Publishing Ltd, 2013) -
Tomato Leaf miner (Tuta absoluta) (Meyrick 1917) (Lepidoptera: Gelechiidae) prevalence and farmer management practices in Kirinyanga County, Kenya
Nderitu, Peris Wangari; Muturi, Jamleck; Otieno, Mark; Arunga, Ester E.; Mattias, Jonsson (Academic Journals, 2018-08)Pest invasion is one of the limiting factors affecting food production. Tomato leaf miner (Tuta absoluta) (Meyrick 1917) (Lepidoptera: Gelechiidae), is an invasive insect pest of tomato. However, In Kenya, there is limited ... -
Trait matching of flower visitors and crops predicts fruit set better than trait diversity
Garibaldi, Lucas A.; Otieno, Mark; Bartomeus, Ignasi; Bommarco, Riccardo; Klein, Alexandra M.; Cunningham, Saul A.; Aizen, Marcelo A.; Boreux, Virginie; Garratt, Michael P. D.; Carvalheiro, Luısa G.; Kremen, Claire; Morales, Carolina L.; Schuepp, Christof (Wiley Online Library, 2015)Summary Understanding the relationships between trait diversity, species diversity and ecosystem functioning is essential for sustainable management. For functions comprising two trophic levels, trait matching between ... -
The Utility of Aerial Pan-Trapping for Assessing Insect Pollinators Across Vertical Strata
Nuttman, Clive; Otieno, Mark; Kwapong, Peter K.; Combey, Rofela; Willmer, Pat; Potts, Simon G. (2011)Insect pollinators provide a critical ecosystem service by pollinating many wild flowers and crops. It is therefore essential to be able to effectively survey and monitor pollinator communities across a range of habitats, ...