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All Journal Biotika: Jurnal Ilmiah Biologi Cropsaver : Journal of Plant Protection
Rika Meliansyah
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology

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Bioactivity Formulation Of Leaf Extract Of Kalanchoe pinnata And Seed Of Azadirachta indica Against Spodoptera litura Hedi Paramita; Lindung Tri Puspasari; Yusup Hidayat; Rika Meliansyah; Danar Dono; Rani Maharani; Unang Supratman
CROPSAVER Vol 1, No 1 (2018)
Publisher : Departemen Hama dan Penyakit Tumbuhan Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (280.565 KB) | DOI: 10.24198/cs.v1i1.16995

Abstract

The aim of this research is to know the most effective concentration of liquid formulation of Kalanchoe pinnata leaf extract 50 EC and Azadirachta indica seed extract 50 EC against S. litura. The experiment was conducted at the Laboratory of Pesticides and Enviromental Toxicology, Department of Plant Pests and Diseases, Faculty of Agriculture, Universitas Padjadjaran. The concentration were tested of each formulation were 1%, 2%, 3 %, 4%,and control.  The experiment arranged in completely randomized design (CRD) and replicated three times. The results showed that the formulation of A. indica seed extract 50 EC at concentration of 2%, 3%, and 4% effective against S. Litura larvae with mortality of 76.7%, 86.7, and 93.3%  This formulation also causing a decrease in feeding activity, weight, and lenghten the development time of S.litura larvae. Unlike the case with liquid formulations of K. pinnata 50 EC extract which was less toxic and did not show significant differences in feed intake, weight of larvae, and development time of larvae compared control treatment.                Keywords: Toxicity, mortality, growth dearragement, botanical insecticide.
Bioactivity Fraction of Methanolic Seed Extract of Barringtonia asiatica L. (Kurz.) (Lecythidaceae) Against Spodoptera litura F. (Lepidoptera: Noctuidae) Teddy Budiyansyah; Danar Dono; Rika Meliansyah; Unang Supratman
CROPSAVER Vol 1, No 2 (2018)
Publisher : Departemen Hama dan Penyakit Tumbuhan Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (479.142 KB) | DOI: 10.24198/cs.v1i2.19755

Abstract

Water seed extract of Barringtonia asiatica was used as fish poison by traditional community. This study aims to determine the bioactivity of methanolic seed extract fraction of B. asiatica against S. litura. The extract tested was spread evenly on the leaf surface by using microsyringe. The experiment consisted of 12 treatments and 3 replications. Treatments were concentration of 0.3% and 0.1% of fraction 16, 17, 18, 19, 20 of methanolic seed extract of B. asiatica, and concentration of 0.264% methanolic seed extract of B. asiatica; and control. The results showed that the fraction 19 (20% EtOAc and 80% MeOH eluent) of methanol extract of B. asiatica seed has the highest bioactivity against the larvae of S. litura. The fraction 19 of methanolic seed extract of B. asiatica had LC50 value of 0.182% at 12 days after treatment. In addition, the 19 fraction of methanolic seed extract of B. asiatica decreased food intake, weight and lengthened development time of larvae.Keywords : Barringtonia asiatica, bioactivity, fraction, Spodoptera litura.
Effect of Neem Oil Formulation on the Population of Soil Fungi and Disease Intencity of Cercospora Leaf Spot (Cercospora capsici) on Chilli Plants (Capsicum annuum) Sri Hartati; Danar Dono; Rika Meliansyah; Mukhamad Agung Yusuf
CROPSAVER Vol 1, No 2 (2018)
Publisher : Departemen Hama dan Penyakit Tumbuhan Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (491.176 KB) | DOI: 10.24198/cs.v1i2.19753

Abstract

Soil fungi and cercospora leaf spot are soil inhabitants and plant disease, respectively, that usually occur on chilli grown area. Formulation of neem oil was reported to have a role as an environmentally friendly botanical pesticide. This research was objected to studying the effect of neem oil formulation on the population of soil fungi and its suppression on cercospora leaf spot intensity of chilli crop. The field experiment was arranged in the randomized complete block design. The treatments were the concentration of neem oil formulation, i.e. 0%, 1%, 1.25%, 1.50%, 1.75%, and 2.0%. In vitro experiment on the suppression of neem oil formulation on the predominant soil, fungi were arranged in the completely randomized design. The results showed that neem oil formulation did not affect the soil fungi population and cercospora leaf spot intensity. However,2.0% neem oil had the lowest soil population. Neem oil formulation at 1.75% caused the highest suppression on TMa01 isolate (49.81%), and 1.25%, 1.50%, 1.75% and 2.0% of neem oil formulation caused more than 50% suppression on TMf01 isolate in vitro. Neem oil formulation at 2.0% caused the highest suppression on cercospora leaf spot intensity (46.34%).Keywords: Azadirachta indica, botanical pesticide, neem oil
FLUKTUASI POPULASI HAMA WERENG BATANG COKLAT (Nilaparvata lugens Stal.) DAN SPESIES MUSUH ALAMINYA DI DATARAN MENENGAH KECAMATAN LELES KABUPATEN GARUT Martua Suhunan Sianipar; Rika Meliansyah; Alghif Aruni Nur Rukman
BIOTIKA Jurnal Ilmiah Biologi Vol 14, No 1 (2016): BIOTIKA JUNI 2016
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/bjib.v14i1.14412

Abstract

Wereng Batang Cokat (Nilaparvata lugens Stal.) merupakan hama utama tanaman padi.Penelitian ini bertujuan mempelajari ǃuktuasi populasi WBC dan spesies musuh alaminya pada tanaman padi di dataran menengah. Penelitian ini dilakukan dengan metode survei. Survei dilakukan pada tiga lahan percobaan yang bertempat di Kecamatan Leles Kabupaten Garut dan di rumah kaca Departemen Hama dan Penyakit Tumbuhan Fakultas Pertanian Universitas Padjadjaran. Metode pengambilan sampel dilakukan secara diagonal menggunakan perangkap kuning serta manual atau visual counting. Hasil penelitian menunjukkan suhu, kelembaban dan curah hujan tidak memberikan pengaruh yang signiƶkan terhadap ǃuktuasi populasi WBC. Hal ini ditunjukan dengan hasil analisis regresi masing-masing pada suhu (Y= -2,559 + 66,470 x ; R2=0,054 ; P = 0,519), kelembaban (Y= -1,378 + 105,347x ; R2=0,332 ; P = 0,081) dan curah hujan (Y= 0,175 + 4,803x ; R2=0,248 ; P = 0,143). Indeks keragaman musuh alami dari rendah sampai sedang.
Co-Authors Alghif Aruni Nur Rukman Danar Dono Hedi Paramita Lindung Tri Puspasari Martua Suhunan Sianipar Mukhamad Agung Yusuf Rani Maharani Sri Hartati Teddy Budiyansyah Unang Supratman Yusup Hidayat