Aktivitas Insektisida Botani Piper aduncum 20 EC terhadap Ulat Grayak (Spodoptera litura Fabricius (Lepidoptera : Noctuidae)

Pika, Gustari (2023) Aktivitas Insektisida Botani Piper aduncum 20 EC terhadap Ulat Grayak (Spodoptera litura Fabricius (Lepidoptera : Noctuidae). Diploma thesis, Universitas Andalas.

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Abstract

BOTANICAL INSECTICIDE ACTIVITIES Piper aduncum 20 EC AGAINST GRAYERS (Spodoptera lituraFabricius) (LEPIDOPTERA : NOCTUIDAE) ABSTRACT Armyworm (Spodoptera litura Fabricius) is an important pest that can attack various cultivated plants, especially soybeans. Yield losses due to pest attacks can reach 80%, and can even cause crop failure if control is not carried out. This study aims to determine the activity of the botanical insecticide formulation Piper aduncum 20 EC against armyworm (Spodoptera litura) (Lepidoptera : Noctuidae). The research design used was a completely randomized design (CRD) with an experimental method consisting of two tests, namely the preliminary test and follow-up test. The preliminary test consisted of testing the 20 EC Piper aduncum and 20 WP Piper aduncum formulations. The follow-up test consisted of testing the 20 EC formulation which consisted of six treatments and six replications. The biological test used the leaf dip method with second instar larvae of the test insect Spodoptera litura. Parameters observed included mortality, antifeedant activity, duration of larval development, pupa formation, emergence of imago, sex ratio of male and female imago. Observational data were analyzed using ANOVA and if significantly different were further tested with Least Significant Different (LSD) at 5% level. In general, the Piper aduncum 20 EC formulation has low insecticidal activity against the test insect Spodoptera litura. Besides that, it has an influence on mortality, feeding activity, development time, pupa formation, imago appearing and the sex ratio of male and female imago of the Spodoptera litura test insect. The relationship between the concentration of the Piper aduncum 20 EC formulation and the percentage of mortality of the test larvae showed that the LC50 value was 5,89% and the LC95 value was 19,84%. Keywords : Pest, Concentration, Control, Attack

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