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Sobar Darana, Sobar
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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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (423.137 KB) | 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.
The effectiveness of botanical insect glue Surawung langit (Salvinia hyspanica) and mass controlling application technique on Empoasca in tea plant Sucherman, Odih; Harianto, Sugeng; Darana, Sobar
Jurnal Penelitian Teh dan Kina Vol 19, No 1 (2016)
Publisher : Research Institute for Tea and Cinchona

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (226.772 KB) | DOI: 10.22302/pptk.jur.jptk.v19i1.98

Abstract

Empoasca (Empoasca flavescens) is a major pest of tea plant in almost all elevations and can lead of lost production more than 40%.  Chemical insecticide is still use to control this pest. In a long term, this  could be increase the cost as well as environmental damage. To support an environmentally sound control method, an experiment has been conducted by using active ingredient of surawung langit leaf extract and using of mass controlling tool. The experiment was carried out at a productive tea plant of two years prunning, clone GMB-7, block B4, Pasir Sarongge Experimental Garden, Cianjur.   The experiment was arra­nged in a factorial randomized block design with eight treatments, and replicated three times. The aim the experiment was to evaluate the effectiveness of botanical insect glue surawing langit (salvinia hyspanica) and mass controlling application technique on empoasca in tea plant. Result showed that botanical insect glue surawing langit at 10 and 20% applied using mass controlling tool with two blowers were effective in catching of Empoasca as swell as its attack intensity and shoot production. 
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 | Download Original | Original Source | Check in Google Scholar | Full PDF (277.91 KB) | DOI: 10.22302/pptk.jur.jptk.v14i1.6

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.
Co-Authors Odih Sucherman, Odih SUGENG HARIANTO