Assessment Of Possible Integrated Management Alternatives For Fall Armyworm (spodoptera Frugiperda Smith Lepidoptera Nocutidae) On Maize At Melkassa

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Maize is an important crop that is produced in Ethiopia but still falls short of its potential due to biotic and abiotic factors. Fall armyworm (Spodoptera frugiperda Smith) has been one of the yield limiting factors in Ethiopia since its introduction in 2017. This experiment was conducted at Melkasa Research Centre to asses an integrated management of fall armyworm during the 2020 rainy season. The experimental design was split plot design where the two maize varieties (Melkassa 2 and Melkasa 4) were main plot treatments, while different control options were sub-plot treatments which include T1 (Sole maize), T2 (Neem), T3 (Avaunt 150 SC), T4 (intercropping with haricot bean), T5 (Neem +intercropping with haricot bean), T6 (Avaunt 150 SC + intercropping with haricot bean), T7 (Avaunt 150 SC +Neem and T8 (Avaunt 150 SC +Neem + intercropping with haricot bean). The result obtained indicated that there was no significant difference (P>0.05) between the maize varieties in all measured parameters across all maize growth stages. Treatments such as T3, T6, T7 and T8 which contain Avaunt were effective in reducing egg and larval densities of S. frugiperda. In terms of percent infestation, plant score damage and cob damage score, treatments which also contain Avaunt had the least infested, less damaged maize plants and cobs. In a field survey for natural enemies, lady bird beetles and ear wigs were detected. Earwigs were only found from seedling to tasseling stages, while lady bird beetles were detected throughout the growth stages. In laboratory analysis the parasitoids Telenomus remeus Nixon (Platygastridae) (egg parasitoid) and Cotesia icipe Fiaboe, Fernández-Triana, Nyamu, & Agbodzavu (Braconidae) (larval parasitoid) were found at seedling stage, while C. icipe and Charops ater Szépligeti (Ichneumonidae) both larval parasitoid were found at vegetative stage. The highest yield was obtained in T7 (Avant +neem) with the yield of 7555.08 Kg/ha, followed by T3 (Avaunt) which was 7208.4Kg/ha. From the study, it can be concluded that all control measures with Avaunt (T3, T6, T7 & T8) can be used as S. frugiperda control methods and Avaunt (indoxcarb) 150 SC can be recommended to be farmers to integrated with other controls alterenatives.

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Assessment Of Possible Integrated Management Alternatives For Fall Armyworm (spodoptera Frugiperda Smith Lepidoptera Nocutidae) On Maize At Melkassa

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