Reducing the negative impact of using synthetic insecticides in a friendly manner. The alternative is to use a bioinsecticide. Ujung Atap (Baeckea frutescens L.) essential oil is one of them that has the potential as a bioinsecticide. Distillation of fresh leaves and dry leaves. Aedes aegypti larvicide mortality test on the resulting essential oil. A. aegypti mosquitoes that cause dengue fever. Analyze the essential oil content of B. frutescens L. by GC-MS. The Dried Leaf Distillation of B. Frutescens L. produces more and better essential oil than fresh leaves. Dried leaf essential oil is more deadly against larvicides than fresh leaf essential oil of B. frutescens L. Larvacide activity is classified as toxic. There are 25 compounds found in essential oils of fresh leaves and 23 compounds in dry leaves. The compound which is a gastric poison for insects is Limonene.
The existence of the wood needs to be considered so that the use of wood for a particular use needs to pay attention to the quality of wood, both for wood for building materials, furniture, panels, crafts and so on. The weakness of wood compared to substitutes such as metal and concrete is its hygroscopic nature. The aim of this study was to determinethe effect of wood parts treatment on axial direction and sticker thickness on natural drying time on changes in the physical properties of gerunggang wood (Cratoxylon arborescens Bl.). While the expected benefits are as information material for the wood processing industry and wood users to be able to dry the wood properly. The research was conducted at the Forest Products Technology Laboratory for 3 months. Cutting is done by dividing the length of the stem into 3 (three) equal parts in the axial position, namely the base (a1), middle (a2) and end (a3), each cut length ± 2 m for the board (example drying test) ) with ± 2 cm thick and ± 15 cm long for example test of moisture content, specific gravity and shrinkage. The results showed that the average value of fresh water content, saturated point moisture content, and air dry water content had a tendency to decrease in value from the base to the end of the stem. The natural dryingtime has an average tendency to dry more quickly from the base to the end of the stem, with drying times ranging from 28-40 days or an average of 33 days. The end of the wood with a thickness of 3,5 cm sticker dries faster (25 days) with a defect 1 broken edge. Parts of wood with a sticker thickness of 3,5 cm dries faster than the thickness of the stickers 2,5 cm and 1,5 cm. The results of measurements of (BJ) density of gerunggang wood averaged 0,55 including the medium group (BJ 0,4-0,6). Specific gravity has a tendency to increase in value from the base to the end of the rod with an uneven pattern including type 3. The tangential and radial direction shrinkage ratio of 1,88 is included in the medium classification, then gerunggang wood can be used for boards and lightweight construction under the roof, crates, furniture, plywood andconcrete molds. It is recommended to conduct further research on the possibility of using gerunggang wood for artificial boards.Keywords: drying, wood parts, physical properties, gerunggang.
Penelitian ini bertujuan untuk mengetahui dan menganalisis perilaku harian rusa sambar yang meliputi aktivitas berjalan, makan, minum, istirahat, sosial (grooming), bermain sendiri, dan bab/defaksi. Penelitian ini dilaksanakan pada bulan maret 2021 selama 10 hari di penangkaran rusa sambar Kabupaten Lamandau dengan metode pengambilan sampel menggunakan purposive sampling, dan metode scan sampling dengan jumlah sampel 12 rusa sambar dengan interval waktu 10 menit. Analisis kuantitatif sebagai perhitungan persentase, analisis deskriptif, dan uji kruskal wallis untuk menguji apa ada perbedaan yang signifikan antar kelompok variabel indevenden dan variabel dependen, dari hasil yang didapat dari tujuh (7) aktivitas rusa sambar yaitu aktivitas berjalan 10.37, istirahat 8.21, minum 12.65, makan 10.16, sosial (Grooming) 12.45, bermain sendiri 6.44, dan defekasi (BAB) 12.56. Dari hasil penelitian diketahui bahwa terdapat aktivitas rusa sambar melakukan aktivitas makan, aktivitas berjalan, aktivitas istirahat, aktivitas defekasi, aktivitas grooming, aktivitas minum, dan aktivitas bermain sendiri.
Perlindungan bangunan rumah berbahan kayu dari serangan rayap dan organisme perusak kayu lainnya, dapat dilakukan saat tahap pra-konstruksi maupun saat pasca konstruksi. Pemilihan jenis obat pencegah atau pembasmi serangan rayap haruslah ditentukan dan diterapkan dengan seksama, agar mendapatkan hasil yang optimal. Salah satu pengawet kayu terhadap serangan rayap yang bisa dipilih adalah Latrex 400 EC. Penelitian ini bertujuan untuk mengetahui pengaruh besarnya pemberian konsentrasi bahan pengawet Latrex 400 EC dan lamanya perendaman terhadap retensi dan penetrasi bahan pengawet ke dalam kayu, sehingga meningkatkan keawetan kayu karet. Metode analisis yang digunakan adalah rancangan acak lengkap faktorial dimana faktor A merupakan faktor perlakuan konsentrasi bahan pengawet Latrex 400 EC dengan 3 level dan faktor B merupakan perlakuan lama perendaman dengan 3 level. Setiap kombinasi perlakuan dilakukan dengan 3 ulangan. Jadi total sampel pengamatan adalah 27 satuan pengamatan. Hasil penelitian menunjukkan bahwa perlakuan konsentrasi bahan pengawet Latrex 400 EC bahwa perlakuan lama perendaman (B) berpengaruh sangat nyata, sedangkan perlakuan konsentrasi (A) dan interaksi (AB) tidak menunjukkan pengaruh nyata terhadap retensi dan penetrasi bahan pengawet pada kayu karet. Perlakuan konsentarsi dan lama perendaman terbaik terhadap retensi dan penetrasi bahan pengawet Latrex 400 EC ke dalam kayu karet terjadi pada perlakuan konsentrasi 3% (a3) dan lama perendaman 7 hari (b3) dengan retensi sebanyak 0,4774 kg/m3 dan penetrasi 4,624 mm, namun penetrasi ini belum memenuhi standar yang ditetapkan, yakni sedalam 5 mm untuk penggunaan dalam ruangan dan luar ruangan. Standar penetrasi bahan pengawet 5 mm ke dalam kayu karet diharapkan dapat dicapai dengan eksperimen kombinasi peningkatan konsentrasi bahan pengawet dan lama perendaman yang sesuai.
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