Sokoine University of Agriculture

Studies on biological control of fall armyworm, spodoptera frugiperda (j.e. smith) attacking maize in Eastern Central, Tanzania

Show simple item record Ngangambe, M. H. 2020-10-05T06:38:31Z 2020-10-05T06:38:31Z 2019
dc.description M.Sc. Dissertation en_US
dc.description.abstract Fall armyworm (FAW), Spodoptera frugiperda (J. E. Smith) was reported for the first time in Africa in 2016 from America. FAW is widely distributed in Tanzania, causing significant damage to maize. Two factor, cropping systems and biopesticides were tested in Randomized Completely Block Design arranged in a two - way factorial experiment with three replications for their efficacy against FAW and associated parasitoids on maize field at Crop Museum of Sokoine University of Agriculture (SUA). Cropping systems tested included maize sole crop, maize + cowpea, and maize + desmodium and napier grass (push pull system). Biopesticides tested included Metarhizium anisopliae and Beauveria bassiana. The insecticide flubendamide was applied as a positive control, between August 2018 - December 2018 and December 2018 - March 2019 cropping seasons. In the laboratory sampled FAW egg masses and larvae were reared, emerged parasitoids were recorded. Three species of parasitoids (Chelonus bifoveolatus, Coccygidium luteum and Cotesia sp) were recovered. Results showed that C. bifoveolatus was mostly dominant parasitoids. However, highest parasitism rates were in Cotesia sp in push pull plots treated with M. anisapliae in season 1 and 2 (13.7% ± 0.14 and 14.5% ± 0.17 ) respectively. Abundance of parasitoids was significantly affected by cropping systems (p ˂ 0.01) and sampling weeks (p ˂ 0.001 for season 1 and p ˂ 0.01 for season 2) and percept damaged maize plants by FAW was significantly affected by cropping systems (p ˂ 0.001) pesticides (p ˂ 0.001) and cropping systems x pesticides application (p ˂ 0.01). Furthermore, highest maize grain yields and cost benefit ratio were estimated in push pull and cowpea + maize cropping systems compared to sole maize. These results prove that, biological control are effective and involves conservation of natural enemies for sustainable control of FAW. en_US
dc.language.iso en en_US
dc.publisher Sokoine University of Agriculture en_US
dc.subject Biological control en_US
dc.subject Fall armyworm en_US
dc.subject Maize en_US
dc.subject Eastern Central en_US
dc.subject Tanzania en_US
dc.subject Spodoptera frugiperda en_US
dc.title Studies on biological control of fall armyworm, spodoptera frugiperda (j.e. smith) attacking maize in Eastern Central, Tanzania en_US
dc.type Thesis en_US

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