Article Per Year (5 Year)
p-Index From 2020 - 2025
0
P-Index
This Author published in this journals
All Journal Jurnal Sains Teh dan Kina
Dini Jamia Rayati, Dini Jamia
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Computer Science & IT Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering

Published : 5 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 5 Documents
Search

 1 
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

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.
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (280.395 KB) | DOI: 10.22302/pptk.jur.jptk.v14i1.4

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 the formulation of Leucaena leucocephala-based botanical fungicides on blister blight disease (Exobasidium vexans Massee) on tea plant Rayati, Dini Jamia
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 | Full PDF (593.606 KB) | 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%.
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (601.033 KB) | 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%).
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (411.963 KB) | DOI: 10.22302/pptk.jur.jptk.v14i1.5

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.
Co-Authors wahyu widayat