Electronic Theses and Dissertation

Kata Kunci: Serai wangi, Chrysoideixis chalchites, mortalitas, perilaku
Chrysodeixis chalcites termasuk salah satu jenis hama yang merusak tanaman.
Pengendalian hama ini yang ramah lingkungan dapat menggunakan insektisida
nabati, salah satunya yaitu ampas daun serai wangi. Serai wangi (Cymbopogon
nardus) merupakan tumbuhan yang mengandung senyawa kimia yang dapat
menghambat dan mematikan hama tanaman. Tujuan penelitian ini untuk mengetahui
pengaruh pemberian ekstrak ampas daun serai wangi terhadap mortalitas Larva Instar
II Chrysodeixis chalcites, ektstrak ampas daun serai wangi, dan mengetahui
pegaruh pemberian ekstrak terhadap tingkah laku Larva Instar II Chrysodeixis
chalcites. Penelitian ini menggunakan metode eksperimen dengan pola Rancangan
Acak Lengkap (RAL), terdiri dari 6 perlakuan dan 4 ulangan. Perlakuan yang
digunakan adalah (kontrol negatif), (5000 ppm), (10000 ppm), (15000
ppm), (20000 ppm) dan (300 ppm decis/ kontrol positif). Penelitian ini
menggunakan 10 individu larva dalam setiap wadah penelitian dengan jumlah
seluruhnya 240 individu Larva. Data dianalisis menggunakan Analisis Varian
(ANAVA) dan dilakukan analisis lanjut berupa uji jarak nyata Duncan (JNTD) serta
dilakukan analisis regresi probit. Hasil penelitian menunjukkan bahwa nilai
> = 123 > 2,77 dengan menggunakan α = 0,05. Pemberian ekstrak
ampas daun serai wangi berpengaruh nyata terhadap mortalitas larva. Konsentrasi
ekstrak yang menyebabkan 50% larva mati adalah 10.000 ppm. Tingkah laku
bergerak larva memperlihatkan kegelisahan, yang sebelumnya aktif kemudian semakin
melambat, perubahan tingkah laku makan larva juga semakin melemah seiring
peningkatan konsentrasi. Simpulan penelitian ini adalah ekstrak ampas daun serai
wangi dapat menyebabkan mortalitas dan perubahan perilaku makan dan bergerak
Larva Instar II Chrysoideixis chalchites.

Keywords: Lemongrass, Chrysoideixis chalchites, mortality, behavior Chrysodeixis chalcites is one type of pest that damages plants. Environmentally friendly pest control can use insecticides vegetables, one of which is citronella leaf dregs. Lemon grass (Cymbopogon nardus) is a plant that contains chemical compounds that can inhibit and kill plant pests. The purpose of this research is to find out Effect of citronella leaf dregs extract on instar larvae mortality II Chrysodeixis chalcites, extract of citronella leaf dregs, and knowing the effect of extract administration on the behavior of second instar Chrysodeixis larvae chalcites. This study uses an experimental method with a design pattern Completely Randomized (CRD), consisting of 6 treatments and 4 replications. That treatment used were (negative control), (5000 ppm), (10000 ppm), (15000 ppm), (20000 ppm) and (300 ppm decis/positive control). This research using 10 individual larvae in each research container with the number a total of 240 individual larvae. Data were analyzed using Analysis of Variance (ANAVA) and further analysis was carried out in the form of Duncan's real range test (JNTD) as well probit regression analysis was performed. The research results show that the value > = 123 > 2.77 using α = 0.05. Giving extracts Citronella leaf pulp has a significant effect on larval mortality. Concentration extract that causes 50% of the larvae to die is 10,000 ppm. Behavior moving larvae show restlessness, which was previously active then increasingly slows down, the change in feeding behavior of the larvae also weakens along with it increased concentration. The conclusion of this study is the extract of lemongrass leaf pulp odor can cause mortality and changes in eating and moving behavior Instar II larvae of Chrysoideixis chalchites.