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All Journal Agrivet Jurnal Agro Wiralodra
Danar Wicaksono
Universitas Pembangunan Nasional "Veteran" Yogyakarta
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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THE EFFECT OF LIQUID ORGANIC FERTILIZER CONCENTRATION ON GROWTH AND RESULS OF VARIOUS SWEET CORN LINES IN MARGINAL LAND USING A DRIP IRRIGATION SYSTEM Bambang Supriyanta; Oktavia Sarhesti Padmini; Danar Wicaksono; Kundarto Kundarto
Jurnal Agrivet Vol 26, No 1 (2020): AGRIVET
Publisher : UNIVERSITAS PEMBANGUNAN NASIONAL ”VETERAN” YOGYAKARTA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/agrivet.v26i1.4305

Abstract

Utilization of the potential of marginal land with adequate water and nutrients is an important factor in increasing corn production. However, high porosity levels and low nutrient levels cause growth and production of corn is not optimal. The aim of this research is to obtain an irrigation technique combined with efficient fertilization in the sweet corn cultivation system in marginal land. The field research was carried out at Faculty of Agricultural Research Wedomartani, Depok Sleman Yogyakarta. The study was conducted from September 2019 to February 2020. The research aims to get best sweet corn line at various concentrations of liquid organic fertilizer in marginal land with a drip irrigation system.The research was arranged in a completely randomized design (CRD) with 3 replications. The first factor is sweet corn lines, which consists of 9 levels, namely, G1 (5042B), G2 (KD-11), G3 (KD-13), G4 (SB-11), G5 (SB-13), G6 (SB-14), G7 (SB-16), G8 (SB-21), and G9 (SB-22). While the second factor is the irrigation system combined with fertilization (fertigation) which consists of 3 levels, namely the drip irrigation system with a concentration of liquid supplement fertilizer 2 cc / L, 3 cc / L and 4 cc / L. The results showed that the drip fertigation system with a concentration of POC 3 cc / L was able to give a better effect on plant height and leaf length in sweet corn. SB / 1-3 lines was the best lines as prospective parents for making hybrid lines for plant height, leaf length, number of leaves and cob length.Keywords: lines, liquid organic fertilizer, sweet corn, marginal land, irrigation system
The Efficacy Of Encapsulated Castor (Ricinus communis) Leaf Extract Against Colletotrichum Sp. Causing Antracnose In Curly Red Chili Ratu Angkasawati Purboyo; Danar Wicaksono
Jurnal Agro Wiralodra Vol. 9 No. 1 (2026): Jurnal Agro Wiralodra
Publisher : Universitas Wiralodra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31943/agrowiralodra.v9i1.158

Abstract

Anthracnose disease, which attacks curly red chili, can be controlled with botanical plant extract pesticides; however, the liquid formulation is easily degraded, reducing its effectiveness. This study evaluated the efficacy of encapsulated Castor leaf extract against Colletotrichum sp. on curly red chili. The research was conducted from February to July 2025 at the Plant Protection Laboratory, Faculty of Agriculture, UPN “Veteran” Yogyakarta, and the encapsulation process was carried out at Pusat Studi Pangan dan Gizi Universitas Gadjah Mada. The method used was a completely randomized design, both in vitro and in vivo, with six treatments. Observation parameters included fungal colony diameter, percentage of inhibition, disease incidence, disease severity, Area Under the Disease Development Curve, and pesticide effectiveness. Observation data were analyzed using Analysis of Variance and followed by the Orthogonal Contrast Test at 5% significance level. In vitro assays demonstrated the highest effectiveness of the non-encapsulated extract at 1%. In contrast, in vivo evaluations showed that the encapsulated castor leaf extractdid not show a significant difference compared to the non-encapsulated extract in vivo . The efficacy of the 0.5% encapsulated extract was still lower than that of the synthetic fungicide Propineb 70%, yet it demonstrated considerable potential as an alternative for managing anthracnose in curly red chili.
Efficacy of Nano-Encapsulated Citronella Essential Oil Against Anthracnose on Bird’s Eye Chili (Colletotrichum spp.) Dian Utami; Danar Wicaksono
Jurnal Agro Wiralodra Vol. 9 No. 1 (2026): Jurnal Agro Wiralodra
Publisher : Universitas Wiralodra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31943/agrowiralodra.v9i1.159

Abstract

Anthracnose caused by Colletotrichum spp. leads to significant losses in bird’s eye chili (Capsicum frutescens L.) production, including reduced fruit quality, lower yield, and increased production costs. Although synthetic pesticides are widely used for disease management, their prolonged application raises concerns regarding environmental sustainability and food safety. This study aimed to evaluate the antifungal potential of citronella essential oil, in both free and nano-encapsulated forms, against Colletotrichum spp. Compared to the previous studies, this work uniquely evaluates and compares nano-encapsulated and non-encapsulated citronella essential oil against anthracnose in bird’s eye chili. The experiment was arranged in a Completely Randomized Design (CRD) with treatments consisting of citronella essential oil at concentrations of 0.125% and 0.063%, either encapsulated or non-encapsulated, tested under in vivo and in vitro conditions. Parameters observed were incubation period, disease intensity, inhibition percentage, colony appearance, and hyphal morphology. Data were analyzed using ANOVA at a 5% significance level, followed by Duncan’s Multiple Range Test (DMRT) when significant differences were detected. Application of 0.125% citronella essential oil effectively delayed incubation (6.05 DAI), resulting in a disease intensity of 45%, and achieved the highest in vitro inhibition (92.21%) until 10 DAI, outperforming Propineb 70 WP and other treatments. Colony morphology remained generally similar, but notable differences in hyphal fate were observed, including lysis, shrinkage, curling, and unbranched growth. These findings indicate that citronella essential oil is a promising natural candidate to reduce reliance on Propineb 70 WP. However, further field-scale evaluations are needed.
Co-Authors Bambang Supriyanta Dian Utami Kundarto Kundarto Oktavia Padmini, Oktavia Ratu Angkasawati Purboyo