Identification of Local Bioactive Plants as a Source of Natural Insecticides against Fall Armyworm: An Ethno Botanical Approach

Atnafu Wondimu, Beyene Petros, Yitbarek Woldehawariat, Zemede Asfaw

Abstract


Africans have very rich indigenous knowledges of bioactive plants that are important in alleviating problems related to animal and plant diseases, and the pests. The fall armyworm /FAW/ (Spodoptera frugiperda, J.E Smith; Lepidoptera, Noctudea) is an American originated insect pest of food crops that is re-centy widely dispersed almost worldwide. This study aimed at surveying locally grown plants as ecofriendlybotanical solution to the fall armyworm infestation especially in Ethiopia. Ethiopian farmers have very rich indigenous knowledge of alleviating animal and plant pests. In the study, selected bioactive plants were identified by applying rapid ethno-botanical survey method, and simple laboratory tests were conducted using crude extracts to examine the efficacies of the extracts by applying mortality tests on fall armyworm lar-vae. Six local plants were suggested by respondents during the survey. Two of the six suggested plant species (i.e Agarista salicifolia (Ericaceae), and Melia azedarach (Meliaceae) were found to be best bioactive. The study findings proved that the risks associated with use of chemical insecticides to control the FAWs can significantly (p≤0.05) be minimized by applying extracts from bioactive botanicals

Keywords


Fall armyworm; crude extract; Melia azedarach; Agarista salicifolia; Mortality test.

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