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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 1 (2011)
5
Articles
The effective control using biopesticide insects glue against the main pest Empoasca on tea plant

Sucherman, Odih

Jurnal Penelitian Teh dan Kina Vol 14, No 1 (2011)
Publisher : Research Institute for Tea and Cinchona

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Abstract

The observation of the  control of bio-diversity the main pest Empoasca on tea plantation effective, efficient and neighborly environment has been undertaken testing insects glue as biodiversity control to main pests Empoasca in the field. The research done in the Pasir Sarongge Experimental Garden (1.100 m asl), Cianjur, West Java. Testing designed in random block design (RBD) with 5 treatment and 5 replication. Treatment tested were: (1) formulation of glue M-5; (2) formulation of glue M-10; (3) formu­lation of glue M-15; (4) formulation of glue comparator; (5) untreated. All the treatment of glue was applied by means of smeared on mineral water bottle (600 ml), every plot installed 5 bottle. Parameters in the observations were the population Empoasca trapped in glue, and intensity attack Empoasca. Research results in a laboratory pointed out that glue M-5 more effectively entraps pests Empoasca when compared to another formu­lation, and comparator glua, as well untreated. Whereas the results of observation in the overall pointed out that the use of formulation of glue M-5 which is formulation lowest have enough effectively to catch pests Empoasca in the field was 19,83 head trap or the equivalent to the 79,32 head any every plot in the area plot 50 m2. The arrest shall taller when experiments was undertaken in dry season.

The effectiveness of lamtoro(Leucaena sp.) leaf extract on the growth of weed in young tea

Darana, Sobar

Jurnal Penelitian Teh dan Kina Vol 14, No 1 (2011)
Publisher : Research Institute for Tea and Cinchona

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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.

The effect of permanent shade tree at mature tea area on microclimate, the population of pest insects and natural enemies, and tea shoot production

Widayat, Wahyu, Rayati, Dini Jamia

Jurnal Penelitian Teh dan Kina Vol 14, No 1 (2011)
Publisher : Research Institute for Tea and Cinchona

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Abstract

A study to know the effect of permanent shade trees at mature tea area on microclimate, the population of pest insects and natural enemies, as well as tea shoot production was carried out at Blok B-4 Afdeling Gambung Selatan (1.300 m asl) of Research Insitute for Tea and Cinchona, Bandung, West Java, from January up to December 2009. The study carried out using experimental observation method with two treatments, viz. mature tea area with and without permanent shade tree, silver oak (Grevillea robusta). The parameters of microclimate: temperature, relative humidity, and sunshine intensity, the population of various pest insects and natural enemies, as well as tea shoot production were observed regularly during dry and rainy seasons at the two experimental plots. The results showed that the existence of permanent shade trees Grevillea robusta at mature tea area could maintain the temperature, relative humidity (RH), and sunshine intensity suitable for tea growth at dry season, suppress the population of pest insects, and on the contrary increase the population of natural enemies, as well as increase  the tea shoot production, up to 21% at rainy season, and up to 55% at dry season.

The effectiveness of various biological control agents on blister blight disease (Exobasidium vexans Massee) on tea

Rayati, Dini Jamia

Jurnal Penelitian Teh dan Kina Vol 14, No 1 (2011)
Publisher : Research Institute for Tea and Cinchona

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Abstract

In order to obtain an effective, efficient, and environmentally sound biological control method of blister blight disease (Exobasidium vexans Massee) on tea, a field trial has been conducted to know the effectiveness of various antagonistic microorganisms as biological control agents, on blister blight disease. The trial was carried out at Ciliwung Tea Plantation (1.400 m asl), Bogor, West Java, designed in randomized complete block (RCB), with 7 treatments and 3 replications. The treatments tested comprised 2 filamentous fungi (molds): Verticillium sp. and JD (unidentified); yeast: Rhodotorula rubra; 2 bacteria: B5 (unidentified) and Bacillus subtilis; copper-chemical fungicide as a standard treatment; and control. The biological control agents and fungicide were sprayed 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 (disease intensity index higher than 50%), only yeast Rhodotorula rubra which was effective in suppressing blister blight disease intensity on tea, up to 22%. Meanwhile, the others treatments of antagonistic microorganisms could not suppress the disease intensity, even the copper-chemical fungicide as a standard treatment was no longer effective too.

The control of penny fern in tea through pruning and herbicides

Darana, Sobar

Jurnal Penelitian Teh dan Kina Vol 14, No 1 (2011)
Publisher : Research Institute for Tea and Cinchona

Show Abstract | Original Source | Check in Google Scholar | Full PDF (277.91 KB)

Abstract

Study on the control of penny fern in tea through pruning and herbicides was con­duct­ed in Pasir Sarongge Experimental Garden, 1.100 m asl from August to November 2010. Experimental design used was split plot design, consisted of three main plots and six subplots. The main plot (pruning height) consisted of (A) 40 cm pruning height, (B) 55 cm pruning height, and (C) 70 cm pruning height. The subplot (method of weed control), consisted of: (1) glyphosate herbicide at 6 liters/ha, (2) paraquat dichloride herbicide, at 4 liters/ha, (3) 2,4-D herbicide, at 3-3 liters/ha, (4) a com­bination of glyphosate herbicide + 2,4-D at 6 liters/ha, (5) a combination of glyphosate and picloram herbicides, at 4 liters/ha, and (6) manual con­trol of the fern. The total treatment combination was 18 treatments. Each treatment was repeated twice. Observations were made on weed biomass and the growth of tea plants. Weed biomass were observed 3 times with 2-weeks interval, starting at 2 weeks after treatment of weed control.  The growth of tea plants was observed  trought the number of primary shoots. The results showed that  the 40 cm as well as 55 cm pruning height were provided better effectivity compared to 70 cm pruning height. At the third observation, the effectiveness of manual control was similar to the treatment of chemical control, except the treatment of  single 2,4-D. The number of primary shoots  grew on bush after 70 cm pruning height were higher and significantly different compared to the 40 cm pruning height as well as 55 cm pruning height. In every observations, the highest number of primary shoots per bush were consistently obtained from the treatment of combination of  glyphosate and 2,4-D herbicides.