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Jurnal Sains Teh dan Kina
Published by Pusat Penelitian Teh dan Kina
ISSN : -     EISSN : 29622034     DOI : -
Core Subject : Science, Agriculture, Social, Engineering,
Agriculture, Biological Sciences & Forestry Computer Science & IT Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering
Jurnal Penelitian Teh dan Kina is a national journal providing rapid publication of peer-reviewed articles concerned with tea and cinchona commodities based on the aspects, agronomy, plant breeding, soil science, crop protection, postharvest technology and social economy. Papers dealing with result of original research on the above aspects are welcomed with no page charge.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)
Articles 226 Documents
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The effectiveness of lamtoro(Leucaena sp.) leaf extract on the growth of weed in young tea Sobar Darana
Jurnal Penelitian Teh dan Kina Vol 14 No 1 (2011)
Publisher : Research Institute for Tea and Cinchona

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/pptk.jur.jptk.v14i1.8

Abstract

A research to determine the effectiveness of lamtoro leaf extract on the growth of weeds in young tea plan­tation was carried out in Pasir Sarongge Experimental Garden and Plant Pro­tec­tion Laboratory RITC Gambung from June to December 2009. Researches on the effective­ness of lamtoro leaf extracts on the germination of weed’s seed, and on the growth of weeds in the field, were conducted. Lamtoro leaf extract treat­­ment at various concentrations tried, suppressed the germination of seeds of broad­leaf weeds (hareuga and babadotan) in the laboratory. In general, the germination supp­ression were increases with increasing the concentration of the extracts tested. Spraying of lamtoro leaf extract (Leucaena sp.) starting at concentration of 7.50% resul­ted better control effect and significantly different compared to controls. In addition, spraying treatment of lamtoro leaf extract could reduce the number of weed species.
Influence of biological control agents Helicoverpa armigera nuclear polyhedrosis virus (HaNPV) on mortality twig caterpillar (Ectropis bhurmitra Wlk.) Joko Santoso; Merry Antralina
Jurnal Penelitian Teh dan Kina Vol 14 No 2 (2011)
Publisher : Research Institute for Tea and Cinchona

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/pptk.jur.jptk.v14i2.9

Abstract

The objective of this research was evaluate effectiveness of Helicoverpa armigera Nuclear Virus Polyhedrosis virus (HaNPV) on twig caterpillar (Ectropis bhurmitra Wlk) mortality. The experiment was conducted at the Research Institute for Tea and Cinchona, Gambung, Bandung, elevation of + 1.300 m asl, from March 2011 till June of 2011. A completely randomized design was used with 12 treatments and replicated twice. Aplication of four level concentrations of HaNPV on three stadia of the twig caterpillar larvae were performed. The HaNPV concentrations were 4 x 106 PIB/mI, 4 x 104 PIB/ml, 4 x 102 PIB/ml and 0 PIB/ml, and stadia of the twig caterpillar larvae were 2, 3, and 4. The results indicated that direct application of HaNPV on twig caterpillar larvae had similar effect in mortality of the larvae, either in the laboratorium or in the greenhouse, with level of mortality was 70% within four to ten days periode. Laboratory expe­rimentation indicated that 4 x 102 PIB/ml concentration of HaNPV applied directly on stadia 3 and 4 was effective in suppressing Ectropis bhurmitra Wlk. larva population while for larvae stadium 2 the effective concentration was 4 x 104 PIB/ml. In greenhouse experiment revealed that 4 x 102 PIB/ml concentration of HaNPV was effective in suppressing larvae of stadium 2 and stadium 4, while until the end of the experiment no indication of maksimum mortality in stadium 3 population.
The effectiveness of formulation of Lantana camara-based insecticides on looper caterpillar (Hyposidra talaca, Ectropis bhurmitra, Biston suppressaria) on tea plant Dini Jamia Rayati
Jurnal Penelitian Teh dan Kina Vol 14 No 2 (2011)
Publisher : Research Institute for Tea and Cinchona

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/pptk.jur.jptk.v14i2.10

Abstract

To obtain an environmentally sound control method of looper caterpillar (Hyposidra talaca, Ectropis bhurmitra, Biston suppressaria) as an alternative to reduce the use of chemical insecticide in tea estate, a study to evaluate the effect of the formulation of L. camara-based insecticide against looper caterpillar on tea plant has been conducted at Pasir Sarongge Experimental Garden (1,100 m asl), Cianjur, West Java. The trial was arranged in a randomized complete block design with six treatments, replicated four times. The treatments comprised: Formulation WP of L. camara-based insecticide with two doses, 1,5 kg/ha and 3,0 kg/ha; Formulation EC of L. camara-based insecticide with two doses, 1,5 l/ha and 3,0 l/ha; Standard chemical insecticide, Decis 25 EC (delta­metrin) at 300 m/ha; and control. The L. camara-based insecticide and chemical insecticide were sprayed three times with one week interval, one day after plucking. The intensity of looper caterpillar attack was measured every week after spraying at the time of plucking. Results showed that all of the L. camara-based insecticide formulation treatments were effective against tea-looper caterpillar. The effectiveness in reducing the intensity of looper caterpillar attack were not significantly different each others, and were comparable to the standard chemical insecticide. The effectiveness level were relatively high, with the average of 45,25%. Based on these results it could be concluded that both formulation of WP and EC of  L. camara-based insecticide could be used for controlling tea-looper caterpillar at lower dose, i.e. 1,5 kg/ha and 1,5 l/ha for the formulation of WP and EC, respectively.
Various non-chemical control methods: their effectiveness on blister blight disease (Exobasidium vexans Massee) on tea Dini Jamia Rayati
Jurnal Penelitian Teh dan Kina Vol 14 No 2 (2011)
Publisher : Research Institute for Tea and Cinchona

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/pptk.jur.jptk.v14i2.11

Abstract

Chemical control method of blister blight disease (Exobasidium vexans Massee) on tea could inflict various negative impacts. In order to obtain an environmentally sound control method of blister blight disease, a field trial has been conducted to know the effectiveness of various non-chemical control methods on blister blight disease. The trial was carried out at Ciliwung Tea Plantation (1.400 m asl), Bogor, West Java, designed in a randomized complete block, with eight treatments and three replications. The treatments tested comprised: the application of an antagonistic fungus (Verticillium sp.) on two level of doses, 2 and 3 kg/ha; the application of nutrient (mollases 2% + urea 1%); the application of the combination of the antagonistic fungus and nutrient (Verticillium sp. 2 kg/ha + mollases 2% + urea 1%); the application of compost tea with and without aeration system; the application of copper-chemical fungicide as standard treatment; and control. All of the treatments were applied by spraying on tea bushes infected by blister blight disease, and the parameter observed was blister blight disease intensity, which was formulated in percentage of disease intensity index (DII). The results showed that in heavy-attack condition (DII higher than 50%), only the treatments of compost tea application which were effective in suppressing the intensity of blister blight disease. Meanwhile, other treatments of non-chemical control methods could not suppress the disease intensity, even the copper-chemical fungicide as a standard treatment was no longer effective too.  The results also showed that the use of aeration system in making compost tea could increase the effectiveness of compost tea in controlling blister blight disease. The effectiveness level of aerated compost tea (42.9%) was higher than non-aerated compost tea (29.5%).
Superior sinensis tea clones release of GMBS 1, GMBS 2, GMBS 3, GMBS 4, and GMBS 5 Bambang Sriyadi
Jurnal Penelitian Teh dan Kina Vol 14 No 2 (2011)
Publisher : Research Institute for Tea and Cinchona

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/pptk.jur.jptk.v14i2.12

Abstract

Developing of Indonesian green tea with international standards must be supported by availability of exellence sinensis tea plant materials with hight yielding and good quality. Selection mother bush using genetic plant materials of seedling sinensis tea plants at Pasir Sarongge were found 42 exellence mother bushes or 1,35 % from 31.104 bushes collection, but three clones were poor in rooting ability and 11 clones were succeptible to blister blight. We found 28 potential clones with hight yielding, good rooting ability, and resistance to blister blight. Testing material indicated that 15 clones with high yield, good quality, and  good taste. Multi-location tests in three years showed that I.2.167; II.1.1; II.1.46; II.2.157; and II.3.109 clones were high in yielding ability and with good stability in performance and broad adaptability. These clones were officialy release by The Evaluation and Variety Release Committee of the Department of Agriculture on its meeting on March 5, 2009 followed by minister decrees of release of these clones as follows: decree number 1979/Kpts/SR.120/4/2009 concern­ing release of GMBS 1 clones, 1980/Kpts/SR.120/4­/2009 concerning release of GMBS 2 clones: 1981/Kpts/SR.120/4/­2009 concerning release of GMBS 3, 1982/Kpts/SR.120/4/ 2009 concerning release of GMBS 4 clones, and 1983/Kpts/SR.120/4/2009 concerning release of GMBS 5.
Variability and early selection for tea plant population derived from artificial crossings Heri Syahrian Khomaeni; Bambang Sriyadi
Jurnal Penelitian Teh dan Kina Vol 14 No 2 (2011)
Publisher : Research Institute for Tea and Cinchona

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/pptk.jur.jptk.v14i2.13

Abstract

The purpose of tea breeding is to develope new elite clones. Artificial crossings is the method for developing a new population with high genetic variability in respective traits followed by selection process. Genetic variability information is important in selection method. A hundred and five F1 plants were planted in 1991. These F1 plant were selected from F1 generations of several parental cross combinations between PS 1, PS 354, TRI 777, TRI 2024, TRI 2025, Kiara 8, KP 4, and Cin 143. The crosses were made in 1989. Observed variables were yield per bush, number of pekoe, number of dormant shoot (banji), weight of p+3 (pekoe with three leafs below), weight of p+2 (pekoe with two leafs below), and weight of banji. Phenotypic variance and standard deviation were made. The level of variability of all characters were evaluated. All plants with performance level greater than general mean plus one and a half standard deviation were selected for respective traits. Results showed that yield per bush, number of pekoe, and number of banji had wide variability. The variability of p+3, p+2, and banji had narrow variability. Eight bushes were selected with yield potential ranging from 4,290 kg/ha/year and 6,261 kg/ha/year.
Selection of superior assamica tea clones with high yield potential and high catechine contents Bambang Sriyadi
Jurnal Penelitian Teh dan Kina Vol 15 No 1 (2012)
Publisher : Research Institute for Tea and Cinchona

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/pptk.jur.jptk.v15i1.15

Abstract

Selection of superior assamica tea clones with high yielding potential and high catechine contents, was conducted using plant materials of selected mothers bushes from F1 polyclonal seed field with a clone composition of Kiara 8, TRI 777, TRI 2024, TRI 2025, and PS 1. The selected bushes had a minimum 100 g per bush. This research was conducted in Pasir Sarongge Experimental Garden, representing medium elevation and Gambung Experimental Garden, representing high elevation. Experimental design in each location was a randomized complete block design with three replications. Twenty five selected clones were used in this research with one high yielding GMB 7 as a check. Plot contained 15 bushes with plant distant of 120 x 80 cm. Shoot yield were observed in September to November 2010 on six years old plant of third prunning stages with plucking cycle seven days. Catechine content of clone were observed by extracting dry tea shoot in boilling water, followed by deluting in ethyl acetate and HPLC readings. The results showed that in medium elevation clone number of II.32.15 had similar yielding potential with GMB 7 clone with catechine content 16,44%, and at high elevation clones number of II.6.10, III.28.4, III.35.3, and III.36.15 had high yielding potential and catechine content of 15,35%; 16,13%; 16,03%; and 13,14% respectively
The effectiveness of the formulation of Leucaena leucocephala-based botanical fungicides on blister blight disease (Exobasidium vexans Massee) on tea plant Dini Jamia Rayati
Jurnal Penelitian Teh dan Kina Vol 15 No 1 (2012)
Publisher : Research Institute for Tea and Cinchona

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/pptk.jur.jptk.v15i1.16

Abstract

A study to evaluate the effect of the formulation of L. leucocephala-based botanical fungicide against blister blight disease on tea plant has been conducted in laboratory and in field. In laboratory, the effect of formulation of L. leucocephala-based botanical fungicide was tested against spore germination of E. vexans. The experiment was designed in a randomized complete block (RCB) with ten treatments, replicated three times. The treatments comprised: L. leucocephala-based botanical fungicide in WP and EC formulations, each at concentrations of 0,25%; 0,50%; 1,00%; and 1,50%, standard chemical fungicide at the concentrations of 0,03%, and control. In field, effect of formulation of L. leucocephala-based botanical fungicide was tested against blister blight disease intensity. The trial was conducted at Pasir Sarongge Experimental Garden (1.100 m asl), Cianjur, West Java, designed in a randomized complete block (RCB) with six treatments, replicated fourtimes. The treatments comprised: L. leucocephala-based botanical fungicide in WP formulation at the concentrations of 1,0% and 1,5%, as well as  in EC formulation at the concentrations of 0,5% and 1,0%, standard chemical fungicide at the dose of 100 g/ha, and control. Results showed that L. leucocephala-based botanical fungicide was effective in inhibiting spore germination of E. vexans in laboratory at concentration of 1,5% for WP  formulation, and at the concentrations of 0,5%; 1,0%; and 1,5% for EC formulation. Their effectiveness were not significantly different to each others, and lower (21%) than standard chemical fungicide treatment (71%). In field, L. leucocephala-based botanical fungicide in WP formulation at concentration of 1,5% (Dose: 4,5 kg/ha) was effective in suppressing blister blight disease intensity after four times of application, and its effectiveness was comparable to standard chemical fungicide treatment, in average reached 31,29%.
Preservation of fish using instant extract of green and black tea Tutun Nugraha; Anthony Fernando; Pudjo Rahardjo
Jurnal Penelitian Teh dan Kina Vol 15 No 1 (2012)
Publisher : Research Institute for Tea and Cinchona

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/pptk.jur.jptk.v15i1.17

Abstract

The use of illegal and hazardous preservative agents such as formalin by traditional fishermen and trader has become a problem in Indonesia.  In this research, instant extract powder of green tea and black tea were used as natural preservatives for fish. Both substances are known for their anti-bacterial and anti-oxidative activities due to the presence of various types of polyphenols, particularly the catechin groups. The tea extract powder was produced  by drying  using a spray drying device. The two different tea extract powders were tested separately, and in combination. The tests were done by dipping pieces of fresh indian mackerel fish (Rastrelliger kanagurta), also known locally as kembung banjar, in the solution containing the tea extract. The microbial tests were done using total plate count (TPC) method. The result showed that instant green and black tea extracts was capable in suppressing bacterial growth in fish. When the two substances were mixed together, the preservation activities were found to be stronger than if they were used separately. In addition, histamine and total volatile base nitrogen (TVB-N) tests which are regularly used to test the freshness of fish also showed substantial improvement in the quality of the fish sample. The sensory tests also showed that the extracts were capable of improving the freshness of the fish sample. 
Antidiabetic activity of of green tea ethanol extract on white mouse Dadan Rohdiana; Adang Firmansyah; Anik Setiawati; Nuni Yunita
Jurnal Penelitian Teh dan Kina Vol 15 No 1 (2012)
Publisher : Research Institute for Tea and Cinchona

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/pptk.jur.jptk.v15i1.19

Abstract

In China, India, United State, and some small other countries, tea has been consumed to prevent various disease, such as diabetes mellitus. A number of recent research revealed that consumption of green tea has an impact on the ability of insulin sensitivity in reducing glucose content in human body. Research to know antidiabetic activity of ethanol extract of green tea on experimental rats has been conducted using glucose tolerance method on rats. Results showed that application of 720 mg/kg BW of ethanol extract of green tea at 120, 180, and 240 minutes after application could reduce glucose content in the body. While applications of 180 mg/kg BW and 360 mg/kg BW of ethanol extract of green tea reduced glucose content of the body at 180 and 240 minutes after application respectively.

Page 10 of 23 | Total Record : 226

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