Browsing Research Articles [LISBE] by Author "Arnold, Sarah"
Now showing items 1-13 of 13
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Bio-herbicide potential of naturalised Desmodium uncinatum crude leaf extract against the invasive plant species Parthenium hysterophorus
Ojija, Frederick; Arnold, Sarah; Treydte, Anna (Springer Nature Switzerland AG, 2019-08-16)The exotic plant Parthenium hysterophorus is rapidly invading ecosystems in sub-Saharan Africa, with negative effects on the environment, economy and human and animal health. With the exception of some synthetic herbicides, ... -
The diversity of aphid parasitoids in East Africa and implications for biological control
Woolley, Victoria; Tembo, Yolice; Ndakidemi, Baltazar; Obanyi, Janet; Arnold, Sarah; Belmain, Steven; Ndakidemi, Patrick; Ogendo, Joshua; Stevenson, Philip (Wiley Online Library, 2021-11-18)BACKGROUND Hymenopteran parasitoids provide key natural pest regulation services and are reared commercially as biological control agents. Therefore, understanding parasitoid community composition in natural populations ... -
Elements of agroecological pest and disease management
Belmain, Steven; Tembo, Yolice; Mkindi, Angela; Arnold, Sarah; Stevenson, Philip (University of California Press, 2022-06-01)The development of large-scale monocropped agrisystems has facilitated increased problems with pests and diseases, perpetuating the reliance of farmers on synthetic pesticides. The economic success of synthetic inputs ... -
Enhancing knowledge among smallholders on pollinators and supporting field margins for sustainable food security
Elisante, Filemon; Ndakidemi, Patrick; Arnold, Sarah; Belmain, Steven; Gurr, Geoff; Darbyshire, Iain; Xie, Gang; Tumbo, Julie; Stevenson, Philip (Elsevier Ltd., 2019-08)Agro-ecological intensification (AEI) harnesses natural processes, such as pollination, that support sustainable crop production and can buffer against future food security risks. However, the transition from conventional ... -
Field Margin Plants Support Natural Enemies in Sub-Saharan Africa Smallholder Common Bean Farming Systems
Ndakidemi, Baltazar; Mbega, Ernest; Ndakidemi, Patrick; Belmain, Steven; Arnold, Sarah; Woolley, Victoria; Stevenson, Philip (MDPI, 2022-03-28)Flower-rich field margins provide habitats and food resources for natural enemies of pests (NEs), but their potential, particularly in the tropics and on smallholder farms, is poorly understood. We surveyed field margins ... -
Field Margin Vegetation in Tropical African Bean Systems Harbours Diverse Natural Enemies for Biological Pest Control in Adjacent Crops
Mkenda, Prisila; Ndakidemi, Patrick; Stevenson, Philip; Arnold, Sarah; Belmain, Steven; Chidege, Maneno; Gurr, Geo (MDPI, 2019-11-14)Non-crop vegetation around farmland can be valuable habitats for enhancing ecosystem services but little is known of the importance of field margins in supporting natural enemies of insect pests in tropical agriculture. ... -
Identifying the right plants for diverse biocontrol agents in tropical smallholder bean farming systems
Mkenda, Prisila; Ndakidemi, Patrick; Stevenson, Philip; Arnold, Sarah; Belmain, Steven; Darbyshire, Iain; Gurr, Geoff (African Journals OnLine (AJOL), 2022-10-20)Biocontrol agents such as predators, parasitoids and pathogens potentially regulate crop pests populations. The agents feed directly on the pests, oviposit in the pest body or cause disease in the pest. While biocontrol ... -
Impacts of alien invasive Parthenium hysterophorus on flower visitation by insects to co-flowering plants
Ojija, Fredrick; Arnold, Sarah; Treydte, Anna (Springer Nature, 2019-05-11)The exotic invasive plant Parthenium hysterophorus is invading many tropical habitats. While much work has been done on its interactions with other native plants, little is known about its interaction with insect floral ... -
Insect pollination is important in a smallholder bean farming system.
Elisante, Filemon; Ndakidemi, Patrick; Arnold, Sarah; Belmain, Steven; Gurr, Geoff; Darbyshire, Iain; Xie, Gang; Stevenson, Philip (PeerJ, 2020-10-20)Many crops are dependent on pollination by insects. Habitat management in agricultural landscapes can support pollinator services and even augment crop production. Common bean ( L.) is an important legume for the livelihoods ... -
Multiple ecosystem services from field margin vegetation for ecological sustainability in agriculture: scientific evidence and knowledge gaps.
Mkenda, Prisila; Ndakidemi, Patrick; Mbega, Ernest; Stevenson, Philip; Arnold, Sarah; Gurr, Geoff; Belmain, Steven (PubMed, 2019-11-28)Background Field margin and non-crop vegetation in agricultural systems are potential ecosystem services providers because they offer semi-natural habitats for both below and above ground animal groups such as soil organisms, ... -
Natural Pest Regulation and Its Compatibility with Other Crop Protection Practices in Smallholder Bean Farming Systems
Ndakidemi, Baltazar; Mbega, Ernest; Ndakidemi, Patrick; Stevenson, Philip; Belmain, Steven; Arnold, Sarah; Woolley, Victoria (MDPI, 2021-08-20)Common bean (Phaseolus vulgaris) production and storage are limited by numerous con- straints. Insect pests are often the most destructive. However, resource-constrained smallholders in sub-Saharan Africa (SSA) often do ... -
Plant competition as an ecosystem-based management tool for suppressing Parthenium hysterophorus in rangelands
Ojija, Fredric; Arnold, Sarah; Treydte, Anna (Elsevier, 2021-01-29)Abstract The exotic invasive plant pathenium hystephorus is invading rangelands in Africa while causing negative effects on the biodiversity, environment, economy, and human and animal health because eco-friendly control ... -
Plant-Rich Field Margins Influence Natural Predators of Aphids More Than Intercropping in Common Bean
Ndakidemi, Baltazar; Mbega, Ernest; Ndakidemi, Patrick; Belmain, Steven; Arnold, Sarah; Woolley, Victoria; Stevenson, Philip (MDPI, 2022-06-23)Field margins support important ecosystem services including natural pest regulation. We investigated the influence of field margins on the spatial and temporal distribution of natural enemies (NEs) of bean pests in ...