Wood vinegar (WV) was obtained from charcoal production byproducts. The increase in demand for WV as an alternative pesticide requires more production of WV independent of conventional charcoal production. This research was intended to commence the production of WV from available furniture wood waste. The study included the following: (i) the preparation and performance of a pyrolysis kiln; and (ii) the application of the produced WV as a plant growth regulator of papaya plants in the nursery and as a pest insect repellent during maize storage. These experiments were arranged in a randomized block design. The observed variables included pyrolysis rate, the effect of WV on papaya growth in nursery, and the effect of WV in controlling infestation of maize weevils. The data were analyzed using analysis of variance and continued with Duncan's multiple difference test. The results showed that while the production of WV continuously occurred until the 90 th min, the maximum (139 mL) was reached at the 10 th min. Pyrolysis of 1,000 g of chips of wood-planer's waste yielded WV, tar, bio-oil, and char in quantities of 487.67 mL, 41.76 g, 2.93 mL, and 222 g respectively. The treatment using WV (50 mL/L) increased the diameter of papaya stems in the nursery. Mixing and fuming application of 5 mL of WV as a pest insect repellent on 200 g of maize on the storage could increase the number of the dead maize weevil and reduce the damage maize kernel.

Development of high quality palm tree is needed for fulfilling the raw material of palm sugar and other products based on palm tree. This study aims to analyze the sap water yield and palm sugar quality in Tasikmalaya District. The method used in this study was survey and direct measurement of water content, pH, colour, texture, smell, taste, and performance. The geographical indication approach was used to determine the location of the study. The result showed that the average of sap water for palm sugar was 14.13% or 1 kg palm sugar equivalent to 7 litre of sap water, meanwhile 1 kg palm sugar powder equivalent to 7.6 litre of sap water (13.07%). The water content of palm sugar and palm sugar powder were 3.5% and 2.2% respectively.

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Tanaman tomat (Solanum lycopersicum L.) merupakan salah satu komoditas hortikultura yang rentan terserang penyakit. Penyakit yang dapat menyebabkan tanaman tomat kehilangan hasil hingga mencapai 86% adalah penyakit bercak coklat yang disebabkan oleh cendawan patogen Alternaria solani. Penelitian ini bertujuan untuk mengetahui pengaruh minyak daun cengkeh dalam menghambat pertumbuhan cendawan A. solani. Percobaan dilaksanakan pada bulan Agustus 2020 sampai Januari 2021 di Laboratorium Fakultas Pertanian Universitas Siliwangi. Metode yang digunakan yaitu metode eksperimen dengan menggunakan Rancangan Acak Lengkap (RAL) yang terdiri dari 5 perlakuan dan diulang sebanyak 5 kali. Hasil uji pendahuluan menunjukkan bahwa perlakuan minyak daun cengkeh dengan konsentrasi 0,065%, 0,08%, dan 0,095% dapat menghambat pertumbuhan miselium cendawan A. solani dengan persentase penghambatan sebesar 100%, sedangkan untuk perlakuan ekstrak daun pepaya pada konsentrasi 15%, 30% dan 45% secara berturut-turut menunjukkan nilai persentase penghambatan sebesar -9%, 9%, dan 40%. Minyak daun cengkeh dengan konsentrasi 0,065% menunjukkan penghambatan tertinggi terhadap pertumbuhan miselium cendawan A. solani dibandingkan dengan perlakuan konsentrasi yang lain.

Javanese ginseng (Talinum paniculatum Gaertn) is one of the medicinal plants which its roots (tubers) and leaves can be used as a medicine. The productivity of javanese ginseng is influenced by the availability of water. The purpose of this study was to determine the growth of javanese ginseng under the differences of watering volume. Watering volume treatment consisted of 7 treatments with 4 replications using a Randomized Block Design (RBD). Watering volume treatment consisted of 80% of field capacity (control), 50% of field capacity, 60% of field capacity, 70% of field capacity, 90 of field capacity, 100% of field capacity and 110% of field capacity. Watering volume treatment on javanese ginseng gave significantly different effect on plant height, number of leaves, root length, wet weight, and chlorophyll content, while the insignificant difference was shown in the number of stomata and relative moisture content. The best growth for plant height, number of leaves, root length, wet weight and chlorophyll content of javanese ginseng was shown in the treatment of watering volume of 50% of field capacity.