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All Journal Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Prosiding SNPBS (Seminar Nasional Pendidikan Biologi dan Saintek)
Wagiman, Rejo
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Engineering Environmental Science

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The Effect of Various Concentrations of Both Lime Juice and Synthetic Citric Acid Solutions to Protect Capsicum frutescens L. against Yellow Leaf Curl Disease Wagiman, Rejo; Agus, Yohanes Hendro; Simanjuntak, Bistok Hasiholan
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 12 No. 3 (2023): September 2023
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v12i3.676-683

Abstract

The yellow leaf curl (YLC) disease is one of plant disease generally found in chili pepper. The aim of the research was to know various concentrations of lime juice and synthetic citric acids to protect chili pepper (Capsicum frutescens L.) against YLC disease. The research used a randomized completely block design using seven treatments and three replications. The treatments tested were spraying lime juice of 0.1%, 0.2%, and 0.3% volume per volume (v/v); citric acid solution of 0.1%, 0.2%, and 0.3 % weight per volume (w/v). Control was used water only. The data result were analyzed using the honestly significant different test at the 95% confidence level. The treatment of both lime juice and citric acid solutions 0.2% and 0.3% could decreased whitefly population on chili pepper compared with control. The lime juice and citric acid solutions 0.3% was able to reduce the incidence and intensity of YLC disease. Lime juice and citric acid solution of 0.2% and 0.3% increased fruit numbers and fruit weights compared with control. The lower whitefly population decreased disease incidence of YLC (with regression Y = 5.7505x – 48.029). Intensity of YLC disease decreased fruit numbers and fruit weight (correlation value of -0.949 and -0.912). Keywords:  Citric acid, Chili pepper, Gemini virus diseases, Whitefly.
Penkajian Fosil Cangkang Siput dari Lempung Hitam Formasi Pucangan, Situs Purbakala Sangiran, Jawa Tengah Gintu, Agung R.; Salenussa, Marchelia Welma; Amanda, Andrea; Wagiman, Rejo; Pramono, Dwi
Prosiding SNPBS (Seminar Nasional Pendidikan Biologi dan Saintek) 2022: Prosiding SNPBS (Seminar Nasional Pendidikan Biologi dan Saintek)
Publisher : Universitas Muhammadiyah Surakarta

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Abstract

Daerah Lempung Hitam merupakan bagian dari formasi Pucangan dan menyimpan banyak fosil cangkang Mollusca. Pada penelitian ini dilakukan karakterisasi terhadap 2 species fosil siput T. tarebra dan F. javanica dari Lempung Hitam. Hasil karakterisasi fisikokimia menunjukkan cangkang T. tarebra mengandung kadar Air 0,48 ± 0,0037%; Abu 0,9885 ± 0,0039g/g; Karbon 0,0064 ± 0,0023g/g; Silikon 0,0922 ± 0,0002g/g; Kalsium 0,4181 ± 0,0395g/g; Potasium 0,0005 ± 0,000g/g; Fosfor0,5710 ± 0,0671g/g; dan Porositas 33,9874 ± 0,0013%. Cangkang F.javanica menunjukkan kadar Air 0,50 ± 0,00%; Abu 0,9748 ± 0,0048g/g; Karbon 0,0146 ± 0,0028; Silikon 0,0836 ± 0,0009g/g; Kalsium 0,2693 ± 0,0145g/g; 0,00047 ± 0,000g/g; Fosfor 0,6589 ± 0,1272g/g; dan Porositas 33,9684 ± 0,000%. Hasil karakterisasi sangat dibutuhkan untuk diinput sebagai database untuk menjelaskan atau untuk pendekatan mekanisme kimiawi selama proses fosilisasi.
Co-Authors Agus, Yohanes Hendro Amanda, Andrea Bistok Hasiholan Simanjuntak Dwi Pramono Gintu, Agung R. Salenussa, Marchelia Welma