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Jurnal Penelitian Teh dan Kina
Jurnal Penelitian Teh dan Kina is an 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.
Articles by issue : Vol 14, No 2 (2011)
5
Articles
Influence of biological control agents Helicoverpa armigera nuclear polyhedrosis virus (HaNPV) on mortality twig caterpillar (Ectropis bhurmitra Wlk.)

Santoso, Joko, Antralina, Merry

Jurnal Penelitian Teh dan Kina Vol 14, No 2 (2011)
Publisher : Research Institute for Tea and Cinchona

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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

Rayati, Dini Jamia

Jurnal Penelitian Teh dan Kina Vol 14, No 2 (2011)
Publisher : Research Institute for Tea and Cinchona

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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

Rayati, Dini Jamia

Jurnal Penelitian Teh dan Kina Vol 14, No 2 (2011)
Publisher : Research Institute for Tea and Cinchona

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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

Sriyadi, Bambang

Jurnal Penelitian Teh dan Kina Vol 14, No 2 (2011)
Publisher : Research Institute for Tea and Cinchona

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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

Khomaeni, Heri Syahrian, Sriyadi, Bambang

Jurnal Penelitian Teh dan Kina Vol 14, No 2 (2011)
Publisher : Research Institute for Tea and Cinchona

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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.