CD Skripsi
Uji Beberapa Konsentrasi Ekstrak Akar Tuba (Derris Elliptica Benth) Untuk Mengendalikan Hama Ulat Grayak (Spodoptera Frugiperda J. E. Smith) Di Laboratorium
ABSTRACT
Spodoptera frugiperda J. E. Smith is the main pest attacking maize crops.
The usual control is the use of synthetic insecticides, but the continuous or unwise
use of synthetic insecticides will have a negative impact on humans and the
environment, therefore an alternative insecticide that is safe and environmentally
friendly, such as tuba roots (Derris elliptica Benth) is needed. The purpose of this
study was to obtain an effective extract concentration of Derris elliptica Benth
to control S. frugiperda. The research was conducted at the Plant Pest Laboratory
of the Faculty of Agriculture, Riau University, Pekanbaru from February
to April 2020. The concentration treatments used were 0 g.l-1 water, 25 g.l-1 water,
50 g.l-1 water, 75 g.l-1 water and 100 g.l-1 water. The experiment used a
completely randomized design (CRD) with 5 treatments and 4 replications.
The results showed that the concentration of 50 gl-1 water was able to control the
pest of S. frugiperda and could cause total mortality of 80% with an initial time of
death of 7,00 hours after application, and LT50 26,00 hours after application.
Keywords: Spodoptera frugiperda J. E. Smith, tuba root (Derris elliptica Benth),
botanical insecticide, concentration
Tidak tersedia versi lain