Judul: Serangan Ganoderma sp. Penyebab Penyakit Akar Merah di Hutan Pendidikan Gunung Walat(HPGW), Sukabumi, Jawa Barat
Abstrak: Gunung Walat University Forest(GWUF) is known as education and research area. GWUF has a lot of homogen areas,therefore these area was attacked easily by disease, and of course this red root disease. Red root disease is caused by Ganoderma sp. and this disease can spread for plant to another plant in a lot of ways. The objectives of the study were to review the spreading of Ganoderma sp. that cause red root disease which attack the forest tree in GWUF and also to identified spesies of Ganoderma sp. in visual way. The results showed that there wereGanoderma sp. in GWUF which spread in a lot of areas and also there are 7 spesies of Ganoderma sp. in Agathis and Pinus bloks, 5 of them are attack Agathis blok and 2 another spesies are attack Pinus bloks. Each Ganoderma sp. of Ganoderma sp. has different characteristic of its morphology.
Keyword: red root disease, Pinus sp., GWUF, Ganoderma sp., Agathis sp

Judul: Potential of Biological Agents in Controlling Ganoderma sp. in Sengon Stands on Post Mining Land, North Kalimantan
Abstrak: Reklamasi menggunakan tanaman sengon pada lahan PT. Pesona Khatulistiwa Nusantara masih rentan terhadap serangan hama dan penyakit. Jenis penyakit yang umum ditemukan pada tanaman sengon adalah penyakit busuk akar merah yang disebabkan oleh cendawan patogen Ganoderma sp. Penelitian ini bertujuan menganalisis pengaruh agens hayati yaitu, cendawan Trichoderma sp. dan cendawan JakabaBHP01 dalam menghambat pertumbuhan cendawan Ganoderma sp. serta menganalisis pengaruh waktu dalam proses penghambatannya. Uji antagonis dilakukan dengan menggunakan metode kultur ganda antara cendawan patogen dan cendawan antagonis pada media Potato Dextrose Agar (PDA). Perlakuan pengaruh waktu dilakukan dengan dua cara : a) penumbuhan Ganoderma sp. dan cendawan antagonis secara bersamaan dan b) menumbuhkan terlebih dahulu Ganoderma sp. selama 7 hari sebelum diuji daya hambatnya terhadap cendawan antagonis. Hasil uji antagonis menunjukkan bahwa Trichoderma sp. dan JakabaBHP01 dapat menghambat pertumbuhan patogen dengan waktu peletakkan yang dilakukan bersamaan. Hasil penghambatan tertinggi pada Ganoderma sp. A1 adalah perlakuan dengan menggunakan Trichoderma sp. dengan persen penghambatan sebesar 95,63% dan pada Ganoderma sp. A2 perhambatan tertingginya juga dengan perlakuan Trichoderma sp. yaitu sebesar 98,74%. Mekanisme penghambatan pada Trichoderma sp. adalah mekanisme kompetisi dan pada JakabaBHP01 adalah mekanisme mikoparasitisme., Reclamation using sengon plants on PT. Pesona Khatulistiwa Nusantara was still vulnerable to pest and disease attacks. The type of disease commonly found in sengon plants was red root rot disease caused by the pathogenic fungus Ganoderma sp. This research aims to analyze the influence of biological agents, namely, the fungus Trichoderma sp. and the JakabaBHP01 fungus in inhibiting the growth of the Ganoderma sp fungus. and analyze the influence of time in the inhibition process. The antagonist test was carried out using a double culture method between pathogenic fungi and antagonist fungi on Potato Dextrose Agar (PDA) media. The influence of time was treated in two ways: a) growing Ganoderma sp. and antagonistic fungi simultaneously and b) grow Ganoderma sp. for 7 days before testing its inhibitory power against antagonistic fungi. Antagonist test results showed that Trichoderma sp. and JakabaBHP01 can inhibit the growth of pathogens with simultaneous laying times. The highest inhibition results on Ganoderma sp. A1 was a treatment using Trichoderma sp. with percent inhibition of 95.63% and in Ganoderma sp. A2 also had the highest inhibition with Trichoderma sp. namely 98.74%. Inhibitory mechanisms in Trichoderma sp. was a competition mechanism and in JakabaBHP01 it was a mycoparasitism mechanism.
Keyword: Trichoderma sp., antagonistic fungi, mechanism, JakabaBHP01

Judul: Elektrodeposisi Film Tipis Semikonduktor Cu2ZnSnS4 (CZTS) pada Substrat Kaca ITO
Abstrak: Semiconductor Cu2ZnSnS4 (CZTS) thin film that can be used as absorber layers on solar cell module was made via electrodeposition method. CZTS thin film was electrodeposited on the surface of a silicate glass coated with a thin layer of indium tin oxide (ITO). Deposition process was done using potentiostatic mode at room temperature with a potential of 1.05 V for 30, 45, and 60 minutes, followed with annealing the film at 2 different temperatures, 500 ºC using furnace and 180 ºC using hot plate, both treatments for 45 minutes in N2/H2S atmosphere. The X-ray difractograms were analyzed using Match 2 program and showed that the CZTS thin films had kesterit crystalline structure, with a low percentage of CZTS phase. The thin film also contained secondary phases such as Cu2S, ZnS, and SnS. The obtained CZTS thin films had a thickness between 1.039 and 1.676 μm. Absorption study showed that the band gap energy of CZTS thin films which was annealed using furnace ranged from 1.50 to 1.52 eV, whereas that annealed using the hot plate was not observed. The band gap energy value showed that CZTS thin films can be used as sunlight absorber layers on solar cell. The formation of CZTS crystal film on this investigation was effectively performed using furnace annealing process at a temperature of 500 ºC with deposition time of 45 minutes.
Keyword: Thin film, Electrodeposition, Cu2ZnSnS4