Study on the butterflies diversity was conducted in Selabintana Resort, Gunung Gede Pangrango National Park. This study was aimed to obtain information on the diversity of butterflies in Selabintana Resort as one of the indicators for ecological change and to improve the management of Gunung Gede Pangrango National Park in utilizing its nature resource, particularly for research activities. The result showed that the diversity of butterflies was high enough with the total of 17 butterfly species of 6 families found from the area. The dominant family was Nymphalidae which were mostly found in the buffer area.
ABSTRAKGanoderma sp. adalah cendawan patogen yang dapat menyebabkan penyakit busuk akar pada tanaman sengon (Falcataria mollucana). Ganoderma sp. sulit dideteksi karena gejalanya mirip dengan gejala penyakit akar lainnya. Penelitian dilaksanakan di Laboratorium Fakultas Kehutanan IPB yang bertujuan untuk mengetahui laju pertumbuhan diameter koloni Ganoderma sp. dan Trichoderma spp. dan mempelajari kemampuan Trichoderma spp. dalam menghambat pertumbuhan koloni isolat Ganoderma sp. pada media PDA dan MEA secara in vitro. Hasil penelitian menunjukkan bahwa pertumbuhan diameter koloni isolat Ganoderma sp. pada media PDA (7,09 mm/hari) lebih cepat daripada pertumbuhan pada media MEA (5,41 mm/hari). Laju pertumbuhan diameter koloni isolat Trichoderma spp. pada media PDA diperoleh nilai rata-rata secara berturut-turut yaitu T. viride (69,67 mm/hari), T. harzianum (56,49 mm/hari), dan T. pseudokoningii (42,04 mm/hari). Sedangkan pada media MEA diperoleh nilai rata-rata tertinggi dari pertumbuhan diameter koloni isolat berturut-turut untuk T. T.pseudokoningii (59,76%) and T.viride (46,47%).
Seedlings of nyatoh (Palaquium sp.) in nursery of Pamalayan Village, Ciamis have been attacked by leaf spot disease. Symptom of the disease is common on each plant attacked, which is the appearance of dead area of leaf (necrocis ABSTRAKBibit nyatoh (Palaquium sp.) di persemaian Desa Pamalayan, Ciamis terserang penyakit bercak daun. Ciri dan gejala penyakit bercak daun pada umumnya sama pada setiap tanaman yaitu terbentuknya daerah yang mati pada daun (nekrosis). Bercak berwarna coklat dengan tepi agak kekuning-kuningan dan kemudian berubah menjadi merah kehitam-hitaman. Letak bercak pada permukaan daun dimulai dari tepi menuju ke bagian tengah daun. Apabila daun yang terserang disentuh, maka daun tersebut gugur, apabila dibiarkan lama kelamaan daun menjadi kering dan rontok. Penelitian ini bertujuan untuk mengetahui jenis patogen penyebab penyakit, informasi yang diperoleh merupakan proses awal untuk mengambil tindakan pengendalian penyakit. Dari hasil uji "Postulat Koch" dan identifikasi, ternyata penyebab penyakit bercak daun bibit nyatoh adalah fungi Colletotrichum sp. Persentase rata-rata kejadian penyakit bercak daun pada bibit nyatoh pada plot pengarnatan I sebesar 96%, plot I I sebesar 96% dan plot III mencapai 100%. Sedangkan rata-rata intensitas serangan penyakit pada plot pengamatan I sebesar 24,60%, plot II sebesar 28,87% dan plot III sebesar 31,45%.Kata kunci : Colletotrichum sp., Nyatoh (Palaquium sp.), penyakit bercak daun
75 PENINGKATAN KUALITAS BIBIT NYAMPLUNG (Calophyllum inophyllum L.) DAN MALAPARI (Pongamia pinnata L.) DENGAN APLIKASI MIKORIZA DANTrichoderma spp. Quality improvement of nyamplung (Calophyllum inophyllum L.) and malapari (Pongamia pinnata L.) seedlings by Trichoderma spp. and mycorrhizal applications ABSTRACT Nyamplung and malapari are potential bioenergy crops on marginal land to be developed on the coastal land. The constraints of the coastal land is the limited water and soil nutrient. Input technology is needed in order to suceed the crop planting such as by using bio fertilizer. Mycorrhizae plays an essential role in helping plants to absorb phosphate and increase the resistance to drought. Trichoderma spp. involves in producing beneficial hormones for metabolism and helps break down organic matter. Utilization of biofertilizer is still rarely used as treatment in bioenergy plant seedlings. This study aimed to determine the quality of nyamplung and malapari seedlings after mycorrhizal and Trichoderma spp. application in the nursery. Experiments were arranged in a complete randomized block design (RCBD). The treatments of media include: soil as control (T), soil + organic fertilizer with ratio of 3:1(TK), soil + organic fertilizer + mycorhizae 10 g (TKM), soil + organic fertilizer + Trichoderma spp. 10 g (TKT), soil + organic fertilizer + mycorrhizal 10 g + Trichoderma spp. 10 g (TC). The treatments were applied when the seedlings reached one month old. Biofertilizer was sown around seedling roots. Each treatment consisted of 50 samples and 3 replications so the total seedlings were 750 seedlings. The results showed that after 6 and 12 months, treatment in malapari with organic fertilizer + mikoriza + TC gained 67.5% taller and 427% larger on dry weight of leaf than the control, whereas in nyamplung seedlings, TC treatment resulted in better growth with diameter 8% larger, root length 78.56% longer, and total dry weight 7.88% heavier compared to control. ABSTRAKNyamplung dan malapari merupakan tanaman penghasil bioenergi yang potensial untuk dikembangkan di lahan marginal. Salah satu kendala dalam pengembangan lahan pantai adalah ketersediaan air dan kesuburan tanah yang rendah. Teknologi untuk meningkatkan keberhasilan penanaman salah satunya dengan pemanfaatan pupuk hayati. Penelitian ini bertujuan untuk mengetahui pengaruh pemberian mikoriza dan Trichoderma spp. pada media pembibitan bibit malapari dan nyamplung di persemaian. Pengamatan menggunakan metode rancangan acak kelompok lengkap (RAKL). Rancangan penelitian perbedaan media tanam bibit yaitu: tanah sebagai kontrol (T), tanah + pupuk organik perbandingan 3:1 (TK), tanah + pupuk organik + mikoriza perbandingan 3:1:10 gram per polybag (TKM), tanah + pupuk organik + Trichoderma spp. perbandingan 3:1:10 gram per polybag (TKT), tanah + pupuk organik + mikoriza 10 gr + Trichoderma spp. 10 gr per polybag (TC). Aplikasi dilakukan pada saat bibit berumur 1 (satu) bulan dengan cara ditaburkan di sekitar perakaran bibit. Setiap perlakuan terdiri dari 50 sampe...
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