Ecologically based rodent management in Africa: potential and challenges

2011 ◽  
Vol 38 (7) ◽  
pp. 588 ◽  
Author(s):  
Rhodes H. Makundi ◽  
Apia W. Massawe
Keyword(s):  
Management Strategies ◽  
Pest Species ◽  
Agricultural Policies ◽  
Management Skills ◽  
Habitat Manipulation ◽  
Policy Makers ◽  
Agricultural Communities ◽  
Human Interactions ◽  
Important Pest ◽  
Late Control

Rodent management in agriculture remains a major challenge in developing countries where resource-poor farmers are ill equipped to deal with pest species. It is compounded by unpredictable outbreaks, late control actions, lack of/or inadequate expert interventions, expensive rodenticides and other factors. Ecologically based rodent management (EBRM) is recommended as the way forward for rodent management in Africa. EBRM relies on understanding the ecology of pest species and formulating this knowledge into management programs. The present paper evaluates the potential for establishing EBRM in Africa and the challenges that have to be overcome to implement it. The major constraints for establishing EBRM in Africa include the absence of key studies on the taxonomy and ecology of rodents, inadequate research on EBRM, lack of knowledge by farmers on available technologies and agricultural policies that are unfavourable. The development of EBRM and its success in Asia is a strong encouragement to African scientists to develop similar management strategies for the most important pest species such as the multimammate rats, Mastomys natalensis. EBRM initiatives such as the Development of Ecologically Based Rodent Management for the Southern Africa Region (ECORAT) project undertook studies on e.g. rodent ecology, taxonomy, knowledge, attitude and practices and rodent–human interactions in rural agricultural communities. Through this project, EBRM interventions were introduced in Tanzania, Swaziland and Namibia to provide solutions to local rodent-pest problems. Intervention actions including community-based intensive trapping of rodents, habitat manipulation and sanitary measures demonstrated that the impacts of rodents on communities could be drastically reduced. EBRM programs in Africa must address how to change attitudes of target communities, building scientific capacity, implanting rodent-management skills by translating the developed technologies and strategies into simple understandable and easy-to-implement actions and influencing policy makers to accept the concepts and practices to be introduced. Further, we need to demonstrate that EBRM is economically feasible and sustainable and that through community participation, EBRM will become deeply rooted in those communities.

scholarly journals Recent developments with methyl isonicotinate a semiochemical used in thrips pest management

2011 ◽  
Vol 64 ◽  
pp. 287-287 ◽  
Author(s):  
D.A.J. Teulon ◽  
M.M. Davidson ◽  
N.B. Perry ◽  
M-C. Nielsen ◽  
R.W.H.M. Van_Tol ◽  
...  
Keyword(s):  
Wind Tunnel ◽  
Pest Management ◽  
Management Strategies ◽  
Mass Trapping ◽  
Pest Species ◽  
Thrips Species ◽  
Important Pest ◽  
Recent Developments ◽  
Near Future ◽  
Indoor And Outdoor

Methyl isonicotinate is one of several recently discovered and patented semiochemicals used in thrips pest management Methyl isonicotinate is the current active ingredient of LUREMTR (Koppert Biological Systems) and FROC and THSP (PHEROBANK) These lures are mostly used in Europe but there are plans for the release of these or similar products in Australasia in the near future Field and glasshouse trapping experiments and wind tunnel and Ytube olfactometer studies in several countries have shown that methyl isonicotinate has activity against at least 10 thrips species including several important pest species not found in New Zealand Methyl isonicotinate in LUREMTR FROC and THSP is primarily used as a lure with coloured sticky traps for enhanced monitoring of thrips in greenhouses Recent research indicates that methyl isonicotinate has the potential to be used for other thrips management strategies such as mass trapping lure and kill lure and infect and as a behavioural synergist in conjunction with insecticides in a range of indoor and outdoor crops

Validating the Resource-Management Inventory (ReMI)

2020 ◽  
Vol 36 (5) ◽  
pp. 777-786 ◽  
Author(s):  
Julia Waldeyer ◽  
Jens Fleischer ◽  
Joachim Wirth ◽  
Detlev Leutner
Keyword(s):  
Higher Education ◽  
Academic Achievement ◽  
Resource Management ◽  
Measurement Invariance ◽  
Factor Structure ◽  
Management Strategies ◽  
Group Analysis ◽  
Management Skills ◽  
First Year Students ◽  
Management Competency

Abstract. There is substantial evidence that students in higher education who have sophisticated resource-management skills are more successful in their studies. Nevertheless, research shows that students are often not adequately prepared to use resource-management strategies effectively. It is thus crucial to screen and identify students who are at risk of poor resource management (and consequently, reduced academic achievement) to provide them with appropriate support. For this purpose, we extend the validation of a situational-judgment-based instrument called Resource-Management Inventory (ReMI), which assesses resource-management competency (including knowledge of resource-management strategies and the self-reported ability to use this knowledge in learning situations). We evaluated the ReMI regarding factor structure, measurement invariance, and its impact on academic achievement in different study domains in a sample of German first-year students ( N = 380). The results confirm the five-factor structure that has been found in a previous study and indicate strong measurement invariance. Furthermore, taking cognitive covariates into account, the results confirm that the ReMI can predict students’ grades incrementally. Finally, a multi-group analysis shows that the findings can be generalized across different study domains. Overall, we provide evidence for a valid and efficient instrument for the assessment of resource-management competency in higher education.

scholarly journals Mitogenomic analysis of diversity of key whitefly pests in Kenya and its implication to their sustainable management

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Fathiya M. Khamis ◽  
Fidelis L. O. Ombura ◽  
Inusa J. Ajene ◽  
Komivi S. Akutse ◽  
Sevgan Subramanian ◽  
...  
Keyword(s):  
Sustainable Management ◽  
Management Strategies ◽  
Spatial Models ◽  
Abundant Species ◽  
Plant Viruses ◽  
Pest Species ◽  
Agricultural Pests ◽  
Protein Coding ◽  
Aleyrodes Proletella ◽  
Aleurodicus Dispersus

AbstractWhiteflies (Hemiptera: Aleyrodidae) are devastating agricultural pests of economic importance vectoring pathogenic plant viruses. Knowledge on their diversity and distribution in Kenya is scanty, limiting development of effective sustainable management strategies. The present study is aimed at identifying whitefly pest species present in Kenya across different agroecological zones and establish predictive models for the most abundant species in Africa. Whiteflies were sampled in Kenya from key crops known to be severely infested and identified using 16S rRNA markers and complete mitochondrial genomes. Four whitefly species were identified: Aleyrodes proletella, Aleurodicus dispersus, Bemisia afer and Trialeurodesvaporariorum, the latter being the most dominant species across all the agroecology. The assembly of complete mitogenomes and comparative analysis of all 13 protein coding genes confirmed the identities of the four species. Furthermore, prediction spatial models indicated high climatic suitability of T. vaporariorum in Africa, Europe, Central America, parts of Southern America, parts of Australia, New Zealand and Asia. Consequently, our findings provide information to guide biosecurity agencies on protocols to be adopted for precise identification of pest whitefly species in Kenya to serve as an early warning tool against T. vaporariorum invasion into unaffected areas and guide appropriate decision-making on their management.

Percussion signals of Lygus rugulipennis Poppius (Heteroptera: Miridae)

2014 ◽  
Vol 9 (5) ◽  
pp. 543-549
Author(s):  
Sándor Koczor ◽  
Andrej Cokl
Keyword(s):  
Dominant Frequency ◽  
Laser Vibrometer ◽  
Pest Species ◽  
Adult Males ◽  
Tarnished Plant Bug ◽  
Lygus Rugulipennis ◽  
Important Pest ◽  
Low Pass ◽  
Males And Females ◽  
Study Laboratory

AbstractThe European tarnished plant bug (Lygus rugulipennis Poppius) is among the most serious pests in the family Miridae, and therefore there is increasing interest in understanding the behaviour of this species. In the present study, laboratory recordings were taken using a laser vibrometer on adult males and females to ascertain whether acoustic signals are involved in intraspecific communication. Recordings were both carried out on plant and loudspeaker membrane substrates. Males and females emitted vibratory signals and the present results indicate that these signals are important during courtship. The basic signal characteristics measured were the dominant frequency, pulse duration, repetition time and number of pulses per group within the signal. Male and female signals did not differ in respect to any of these characteristics. Plant recorded signals were longer because of different mechanical properties of substrates. Additionally, the high frequency components were attenuated due to the low-pass filtering properties of plants. As this is the first study on vibratory communication of the European tarnished plant bug, we believe these findings may contribute considerably to the better understanding of the mating behavior of this important pest species.

scholarly journals Farmer Knowledge in Potato Virus Epidemiology and Control in Kenya

2020 ◽  
Author(s):  
John Onditi ◽  
Nancy Ng’anga ◽  
Moses Nyongesa ◽  
René van der Vlugt
Keyword(s):  
Potato Virus ◽  
Management Strategies ◽  
Technical Information ◽  
Household Survey ◽  
Farmer Knowledge ◽  
Policy Makers ◽  
Virus Control ◽  
Modes Of Transmission ◽  
Potato Yields ◽  
And Control

AbstractPotato is an important food security crop in Kenya. High prevalence of potato viruses is one of the major causes of low potato yields. Implementation of effective virus management strategies requires information on farmers’ perceptions and practices on virus epidemiology and control. To better understand farmers’ knowledge and practices in virus control and set possible pathways for intervention, a household survey involving 147 respondents was conducted in two major potato-growing regions in Kenya. Lack of sufficient technical information on potato virus symptoms, vectors and modes of transmission was found to be the major hindrance to farmers’ efforts towards virus control. A spider diagram approach was therefore used to determine the aspect of virus control that required the highest prioritization for immediate intervention by policy makers. Use of virus-resistant cultivars was found to require the most urgent attention compared to other aspects of virus control and was expected to have greater impact in lowering virus prevalence. This study showed that enhancing farmer knowledge needs to be prioritised as this is a key determinant of the success of the virus control strategy to be selected for implementation.

State-shifts of lion prey selection in the Kruger National Park

2017 ◽  
Vol 44 (1) ◽  
pp. 28 ◽  
Author(s):  
N. T. Maruping-Mzileni ◽  
P. J. Funston ◽  
S. M. Ferreira
Keyword(s):  
National Park ◽  
Prey Selection ◽  
Management Strategies ◽  
Stable State ◽  
Kruger National Park ◽  
Ecological Processes ◽  
Policy Makers ◽  
Predator Prey ◽  
Key Indicator ◽  
Management Interventions

Aims Indicators of pending state-shifts carry value for policy makers. Predator–prey relations reflect key ecological processes that shape ecosystems. Variance in predator–prey relations may serve as a key indicator of future state-shifts. Methods Lion (Panthera leo) diet in the Kruger National Park was evaluated as such an indicator. Over the three-decade time span reviewed, variance in diet in relation to rainfall, prey abundance, management strategies and disease emergence were reviewed. Key results Rainfall patterns, both seasonal and cyclical, were identified as key drivers of predator–prey selection. However, the intensity of management in the form of artificial waterpoints overrode and confounded natural process. The results suggest that savanna systems are stable and punctuated by climatic events in the form of extreme above-average rainfall that temporarily destabilises the system. However, droughts are a cyclical part of the savanna system. Conclusion Lion prey selection did fluctuate with changing environmental conditions. Abrupt state shifts did occur; however, the ecosystem returned to a stable state. Implications State shifts in ecosystems pose key challenges to conservation managers. State shifts appear to be primarily associated with management interventions and environmental factors.

Spider mites of agricultural importance in China, with focus on species composition during the last decade (2008–2017) 

2018 ◽  
Vol 23 (11) ◽  
pp. 2087 ◽  
Author(s):  
Peng-Yu Jin ◽  
Lu Tian ◽  
Lei Chen ◽  
Xiao-Yue Hong
Keyword(s):  
Species Composition ◽  
Dominant Species ◽  
Integrated Management ◽  
Management Strategies ◽  
Spider Mites ◽  
Management Program ◽  
Pest Species ◽  
Panonychus Citri ◽  
Important Species ◽  
River Region

Understanding pest species composition and their geographic distribution of important spider mites is fundamental and indispensable to establish an integrated pest management program. From a long-term survey during 2008–2017 in mainland China, we found that Tetranychus truncatus was the most frequently sampled Tetranychus spider mite (48.5%), followed by T. pueraricola (21.2%), T. kanzawai (12.5%), T. urticae (red) (5.7%) and T. urticae (green) (4.5%). Among them, T. truncatus was the major mite pest in the north of China. T. kanzawai was the dominant species in the Middle and Lower Reaches of the Yangtze River Region and T. pueraricola was the most important species in the southwest region. Other common and serious pests include Amphitetranychus viennensis (6.8%) and Panonychus citri (3.8%). This pattern was largely different from that in 2002–2004, when T. urticae (green and red) was believed to be the most serious mite pest. The factors involved in the change of species composition are not clear and need more exploration. We suggested that the increasing corn planting range may be partly responsible for the conversion of dominant species from other spider mites to T. truncatus. Further research on the mechanisms underlying the change of dominant species will help develop integrated management strategies.

Befriending Anxiety to Reach Potential: Strategies to Empower Our Gifted Youth

2018 ◽  
Vol 41 (4) ◽  
pp. 186-195 ◽  
Author(s):  
Amy H. Gaesser
Keyword(s):  
Learning Process ◽  
Classroom Environment ◽  
Management Strategies ◽  
Gifted Students ◽  
Management Skills ◽  
Anxiety Management ◽  
Management Intervention ◽  
Emotional Freedom Techniques ◽  
Gifted Youth ◽  
Evidenced Based

Gifted students can encounter anxiety-provoking stressors throughout their day. Developing effective anxiety management skills allows them to better navigate these challenges. Concepts from neuroscience help us better understand responses to anxiety and can assist gifted youth and those working with them in recognizing how and when to best apply anxiety management strategies. This article reviews these concepts and integrating them into the classroom environment to assist with this learning process. In addition, it examines an evidenced-based anxiety management intervention that has been found to be efficacious for gifted youth, Emotional Freedom Techniques (EFT). Results of recent EFT research are reviewed and the steps to learning EFT are outlined.

Interactionist Tools for Assessing Community Resilience

2021 ◽  
Author(s):  
Braden Leap
Keyword(s):  
Climate Change ◽  
Symbolic Interaction ◽  
Ecological Resilience ◽  
Resilience Theory ◽  
Ecological Processes ◽  
Policy Makers ◽  
Approaches To Studying ◽  
Human Interactions ◽  
Economic Downturns ◽  
Policies And Programs

This chapter contends that classic and contemporary research by symbolic interactionists, and those in closely related theoretical traditions, can provide an effective toolkit for enriching assessments of how resilience unfolds in practice. This is especially important if we hope to develop and implement policies and programs that have a greater potential for enhancing communities' abilities to effectively respond to socio-ecological disruptions. The chapter discusses resilience theory before addressing how interactionist work on institutions as well as interactions between humans and nonhumans—what can be referred to as (non)human interactions—can enrich considerations of resilience. Socio-ecological resilience theory has increasingly been utilized by scholars, development officials, and policy makers to assess whether and how communities can be sustained in response to disruptions related to a range of socio-ecological processes such as floods, epidemics, climate change, and economic downturns. Paralleling others who advocate employing multiple theoretical traditions to better assess the intricate complexities of resilience, instead of arguing that symbolic interaction should supplant other approaches to studying resilience, the chapter emphasizes that symbolic interactionism can complement and extend existing research on resilience.

Labour Observatories for Agricultural Policymaking and Sustainable Development

2014 ◽  
pp. 56-63
Keyword(s):  
Sustainable Development ◽  
Developing Countries ◽  
Agricultural Practices ◽  
Relevant Information ◽  
Developed Countries ◽  
Agricultural Policies ◽  
Policy Makers ◽  
The Sustainable Development ◽  
Crop Varieties ◽  
The Right

Assimilation of relevant information within a labour observatory is a key to success of an observatory. Management of such relevant information and its dissemination to the right audience at the right time is also important. In this regard, a labour observatory plays a very important role for successful operationalization of agricultural policies within developing countries. Historical information regarding soil, crop varieties, agricultural practices, and skill of agricultural labourers needs to be maintained by a labour observatory. Information from the observatory has to be communicated to policy makers for making a pragmatic decision in developing countries with large agriculturally dependent populations. These decisions can impact the lives of this population and can impact the sustainable development of these countries. Initiatives related to labour observatory started more than a decade back in developed countries. It has now begun in parts of Africa, too. The chapter highlights these developments and contextualizes the association between these observatories, agricultural policymaking, and sustainable development.

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