Effectivity of organic extract of forest betel fruit (Piper aduncum L.) of Riau to fall armyworm (Spodoptera frugiperda JE Smith) in laboratory

Abstract

Abstract Spodoptera frugiperda is a new pest for maize in Indonesia. The research was aimed to obtain fruit organic extract of forest betel for S. frugiperda mortality in Laboratory. The research was conducted at Pest Laboratory, Faculty of Agriculture, Riau University,Bina Widya Campus, Pekanbaru, Riau Province, Indonesia from February to April 2022. Experiment in completely randomized design was used in the study. There were six treatments and four replicates. 10 larvae instar three of S. frugiperda were infested for each treatment by using spraying method. The treatment was organic extract concentration of forest betel as follows : A0 ( 0 % of organic extract of forest betel), A1 (0.2 % of organic extract of forest betel), A2 (0.4 % of organic extract of forest betel), A3 (0.6 % of organic extract of forest betel), A4 (0.8 % of organic extract of forest betel) and A5 (1.0 % of organic extract of forest betel). The result showed that concentration of 0.8% was the effective one to mortality of S. frugiperda. The total mortality was 82.50% with early lethal time of 2.5 hours after application and lethal time 50 at 31 hours after application. Concentration of 0.32% or 3.2 ml.l−1 was appropriate one to kill 50% of population and concentration of 1.34% or 13.4 ml.l−1 was appropriate to kill 95% of S. frugiperda larvae population