Efficiency of Cyperus rotundus L. extract for control Spodoptera frugiperda (J.E. Smith)
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Abstract
Background and Objectives: Fall armyworm (Spodoptera frugiperda (Lepidoptera: Noctuidae)) is a polyphagous pest that causes damage to economically important crops. The primary method traditionally used to control this pest is chemical insecticides. However, fall armyworms often develop resistance to many insecticides. Our present study aimed to evaluate the insecticidal efficacy and the effects on development of S. frugiperda second instar larvae after being treated with Cyperus rotundus L. crude extracts under laboratory conditions.
Methodology: C. rotundus bulbs were dried and ground into powder, then extracted using hexane, dichloromethane, ethyl acetate, and methanol, respectively. The extracts were then tested on second instar S. frugiperda larvae to observe toxicity values and assess the impact on metamorphosis using topical application under laboratory conditions.
Main Results: The dichloromethane crude extract of C. rotundus exhibited the highest toxicity (LD50 = 4.58 μg/larvae) and influenced the metamorphosis of treated larvae, leading to abnormal pupation.
Conclusions: C. rotundus crude extracts demonstrated control over S. frugiperda in laboratory conditions and may serve as an alternative method for managing this pest in the future.
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References
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