Electronic Theses and Dissertation

Penelitian ini bertujuan untuk mengetahui efektivitas senyawa bioherbisida ekstrak n-heksana babadotan (ageratum conyzoides l.) subfraksi a pada beberapa konsentrasi terhadap pertumbuhan gulma bayam duri (amaranthus spinosus). rancangan yang digunakan pada penelitian ini adalah rancangan acak lengkap pola nonfaktorial dan kemudian dianalisis dengan uji annova. konsentrasi ekstrak senyawa babadotan yang digunakan pada penelitian ini adalah 2%, 4%, 6%, 8% dan 10%, dengan perlakuan kontrol positif (herbisida 2,4-d) dan kontrol negatif (aquades). aplikasi senyawa bioherbisida ekstrak n-heksana babadotan subfraksi a berpengaruh terhadap tinggi, diameter batang dan luas daun bayam duri. ekstrak n-heksana babadotan subfraksi a pada konsentrasi 8% dan 10% dapat menghambat tinggi, diameter batang dan luas daun bayam duri. berdasarkan hasil kromatografi gas spektometri massa (kg-sm) diperoleh 8 senyawa mayor yaitu caryophyllene, precocene i, cis-ß-farnesene, (3r,3ar,7r,8as)-3,8,8-trimethyl-6,methy-leneoctahydro-1h-3a,7-,methanoazulene, caryophyllene oxide, 2h-1-benzopyran, 6,7-dimethoxy-2,2-dimethyl, phytol, squalene. kata kunci: babadotan, ekstrak, n-heksana, konsentrasi, senyawa

This study aims to determine the effectiveness of the bioherbicide compound extract of n-hexane babadotan (Ageratum conyzoides L.) subfraction A at several concentrations on the growth of weeds of spinach thorn (Amaranthus spinosus). The design used in this study was a completely randomized design with a non-factorial pattern and then analyzed by the annova test. The concentrations of babadotan extract used in this study were 2%, 4%, 6%, 8% and 10%, with positive control treatment (2.4-D herbicide) and negative control (aquades). Application of bioherbicide compound extract of n-hexane babadotan subfraction A affected the height, stem diameter and leaf area of thorn spinach. Extracts of n-hexane babadotan subfraction A at concentrations of 8% and 10% can inhibit the height, stem diameter and leaf area of thorn spinach. Based on the results of Gas Chromatography Mass Spectrometry (KG-SM) obtained 8 major compounds namely Caryophyllene, Precocene I, cis-ß-Farnesene, (3R,3aR,7R,8aS)-3,8,8-Trimethyl-6,methy-leneoctahydro -1H-3a,7-,methanoazulene, Caryophyllene oxide, 2H-1-Benzopyran, 6,7-dimethoxy-2,2-dimethyl, Phytol, Squalene. Keywords: Babadotan, Extract, n-Hexane, Concentration, Compound