PhD Dissertation Defence By Tarekegn Fite


The Due Date : 2020-06-25
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PhD Dissertation Defense using Microsoft office 365.

  1. POPULATION GENETICS AND MANAGEMENT OPTIONS OF Helicoverpaarmigera (HUBNER) (LEPIDOPTERA: NOCTUIDAE) IN ETHIOPIA

Pod borer, Helicoverpa armigera is the most destructive pest of chickpea in Ethiopia. We conducted detailed studies to understand farmer’s perceptions, population genetics and management options of H. armigera. Most farmers responded that H. armigera is the most prevalent insect pests of chickpea that should be controlled. Conventional insecticides were commonly used to manage the pest. Genetic diversity of H. armigera indicates high haplotype and low nucleotide diversity in six populations of H. armigera with high gene flow. High percentages of variation within populations were also evident. Funnel-botrack was effective in capturing moths and could be used for infestation detections and population monitoring. Two population peaks were recorded in Dandi district using funnel-botrack and funnel-femtrack. Five larval parasitoids (four tachinid and one ichneumonid) were identified. Beauveria bassiana (APPRC9604) and Bacillus thurengiensis showed potential as biological control agents of H. armigera. Aqueous extracts of M. ferruginea and A. indica at 5 % concentration either individually or in combinations at 2.5 % concentration of each was more effective in reducing H. armigera infestaions. 

By: Tarekegn Fite1,2*, Tadele Tefera1, Mulugeta Negeri2, Tebekew Damte3 and Waktole Sori4
1International Centre of Insect Physiology and Ecology (ICIPE), Addis Ababa, Ethiopia; 2Department of Plant Sciences, Ambo University College of Agriculture and Veterinary Science, Ambo, Ethiopia; 3Debre Zeit Agricultural Research Center, Bishoftu, Ethiopia; and 4Ethiopian Horticulture Producer Exporters Association, Addis Ababa, Ethiopia

Modified By: Ambo University, 2020-06-22

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