Screening of Management Options and Efficacy Evaluations against Fall Armyworm (Spodoptera Frugiperda) (J. E. Smith) (Lepidoptera: Noctuidae) on Maize in Assosa, Ethiopia

Authors: Ahmed S

Volume 1, Issue 1

Abstract

Fall armyworm (FAW), Spodoptera frugiperda (Lepidoptera: Noctuidae), is a key pest of maize. Yield damages have been conveyed between 30 -70% in the Americas, 11 - 100% in Africa, and 32% in Ethiopia. In this study, we evaluated two types of bioassay and synthetic chemicals efficacy against fall armyworm during high infestation year under laboratory. Treatments contained dissimilar rules of insecticide applications that delivered defence damage against fall armyworms and recorded percent of larvae mortality within three consecutive days after application. In vitro, experiment and efficacy evaluations of different management options were tested seven types of plant extracts, seven types of synthetic chemicals, and two types of entomopathogenic fungi. Among chemicals as evaluated management options, Dursban 48%, Best 5EC, karate 5 EC, Dimethote, Radient, Cioragen and Bravo 5EC (80%-93.3%) caused the highest percentage of fall armyworm mortality after 72hrs. Among botanicals, Azadirachta indica, Jatropha carcus, Candle bush, Chenopodium ambrosoids, Eucalyptus globulus and Grewinia tenaxi were evaluated. Percent of larval mortality recorded (71.6%-85.0%) after 72hrs.The entomopathogenic fungi Matharazium aniospolioe and Beauveria basiana causing 70-81.6 % larval mortality after 72hrs.

Keywords: Fall Armyworm; Botanicals; Chemicals; Entomopathogen; Efficacy

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