Browsing by Author "Mwatawala, Maulid"

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    An economic comparison of biological and conventional control Strategies for insect pests in cashew and mango Plantations in Tanzania
    Juma George, William; Hella, Joseph; Esbjerg, Lars; Mwatawala, Maulid; Rwegasira, Gration
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    An economic comparison of biological and conventional control Strategies for insect pests in cashew and mango Plantations in Tanzania
    (2013) Juma George, William; Hella, Joseph; Esbjerg, Lars; Mwatawala, Maulid; Rwegasira, Gration
    This study was undertaken to compare alternative methods of pest control for insect pests in order to determine which methods has the highest efficacy against insect pests and the least detrimental side effects, while maintaining production and profits. The analysis was based on the experimental trials for three treatments: weaver ants, chemical insecticides and control. Data on yields, quantities and prices of inputs and output were collected and analyzed using inferential statistics (t-test), partial budgetary technique and marginal analysis involving dominance analysis. The results of partial budget analysis shows that a change from chemical insecticides treatment to weaver ants returned net benefits greater than zero by Tsh. 692 923 and Tsh.1019665 in cashew and mango plantations respectively. Similarly, positive net benefits was obtained when growers change from control to weaver ants treatment by Tsh. 504 989 and Tsh. 891 297 in cashew and mango plantations. The dominance and MRRanalyses shows that if cashew and mango growers change from conventional agricultural practices to weaver ants, they would earn MRR of 1621% which is above minimum acceptable rate of return (MARR) of 100%. The t-test analyses show that weaver ant treatment is superior over conventional agricultural practices. The study concludes that weaver ant treatment was economically feasible and financially undertaking. Further field experimental trials will be repeated in the next two growing seasons to confirm results obtained in
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    Dynamics of infestation and losses of stored maize due to the larger grain borer (Prostephanus truncatus Horn) and maize weevils (Sitophilus zeamais Motschulsky)
    Makundi, Rhodes H.; Swila, Ntuli N.; Misangu, Robert N; Reuben, Shazia W.M.; Mwatawala, Maulid; Sikira, Anna; Kilonzo, Bukhet S; Lyimo, H.; Massawe, Apia W.; Ishengoma, Christine
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    Host use of bactrocera latifrons, a new invasive tephritid species in Tanzania
    (Entomological Society of America) Makundi, Rhodes H; Mziray, Hendry A; Mwatawala, Maulid; Maerere, Amon; Meyer, Marc DE
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    Host use of bactrocera latifrons, a new invasive tephritid species in Tanzania
    (Entomological Society of America, 2010-02) Makundi, Rhodes H; Mziray, Hendry A; Mwatawala, Maulid; Maerere, Amon; Meyer, Marc DE
    Bactrocera latifrons (Hendel) is a pest of Asian origin, Þrst detected in Africa in 2006. We assessed the host utilization of this quarantine pest in Morogoro region, eastern central Tanzania, by collecting a wide range of cultivated and wild host plants of species belonging to Solanaceae and Cucurbitaceae from April 2007 to April 2008. Fruit were collected from 29 plant species and varieties (16 Solanaceae and 13 Cucurbitaceae) in all agroecological zones of Morogoro region. Twelve solanaceous fruit species yielded B. latifrons of which four are new host records: Capsicum annuum L. cov. longum A. DC., Capsicum chinense Jacq., Solanum sodomeum L., and Solanum scabrum Mill. Similarly, three cucurbitaceous fruit species provided positive rearings and are new host records: Citrullus lanatus (Thunb.) Matsum & Nakai, Cucumis dipsaceus L., and Momordica cf trifoliata L. The infestation rate and incidence of the pest was mainly high in the solanaceous hosts of nightshades (Solanum nigrum L. and Solanum scabrum) and African eggplants (Solanum aethiopicum Lam. and Solanum anguivi). In a host preference study involving limited number of cultivated solanaceous crops, S. scabrum was recorded as the most preferred host. The pest has been found to outnumber Bactrocera invadens (Drew et al.), Bactrocera cucurbitae (Coquillett), and Ceratitis capitata (Wiedemann) in most of the common solanaceous hosts.