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All Journal BIOTROPIA - The Southeast Asian Journal of Tropical Biology Jurnal Perlindungan Tanaman Indonesia Jurnal Penyuluhan Pertanian
Tasrif, Arifin
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Immunology & microbiology Languange, Linguistic, Communication & Media Social Sciences Veterinary Other

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MOTIVATION OF RICE FARMERS IN USING PLANT GROWTH PROMOTING RHIZOBACTERIA AT SEKAYU DISTRICT, MUSI BANYUASIN REGENCY Supriyadi, Didik; Tasrif, Arifin; Kisworo, Arif Nindyo
Jurnal Penyuluhan Pertanian Vol 18 No 2 (2023)
Publisher : Politeknik Pembangunan Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51852/jpp.v18i2.690

Abstract

One of the most common problems in agriculture today is the decline in soil fertility on agricultural land due to the excessive use of chemical fertilizers and pesticide residues and processing of land with agricultural machinery. This study was to determine the level of motivation for using PGPR in lowland rice cultivation, what factors influence the level of motivation, as well as developing a strategy for applying motivation using PGPR in lowland rice cultivation. This research was conducted from April to June in Sekayu District, Musi Banyuasin Regency. The method used is descriptive method and multiple linear regression. Respondents were taken as many as 97 people who were determined purposively (purposive sampling). The results show that the level of motivation is included in the high category. Factors that have a significant effect on farmer motivation are the age of the farmer, the role of extension workers, the availability of facilities and infrastructure, the availability of agricultural information. Based on the multiple linear regression analysis test, it was found that the most critical indicator of farmer motivation was the availability of facilities and infrastructure. From these results an agricultural extension strategy was providing counseling on making PGPR independently in farmer groups.
Potential Antagonists Trichoderma viride as Biofungicide, Plant Spacing, and Agricultural Lime Application to Suppress Anthracnose on Chili Tasrif, Arifin; Yuliar, Yuliar; Sulistyowati, Dwiwanti; Krisnawati, Endang; Adirianto, Bayu; Sugiharti, Dwi
Jurnal Perlindungan Tanaman Indonesia Vol 28, No 1 (2024)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.87342

Abstract

Anthracnose caused by Colletotrichum capsici and C. gloesporium on chili is a disease that can reduce chili yields up to 80%. Control with fungicide has not been able to provide maximum results, because Colletotrichum can spread due to splashing of water, especially in the rainy season. The use of antagonistic fungi against Colletotrichum spp. has been widely published but is still limited to the laboratory and greenhouse scale, while field conditions are unpredictable. This study aims to identify the potency of Trichoderma viride that can be used as a biofungicide to control anthracnose in chili and to determine aspects of agronomic that can reduce the risk of anthracnose in chili. Samples of infected plants of stems, leaves, and fruits were collected from experimental farm of Bogor Agricultural Development Polytechnic. The experiment was conducted using Randomized Complete Design and Randomized Complete Block Design. The percentage of disease intensity of the fungus C capsici and the intensity of anthracnose in chili both under screen house and open fields. While testing the effect of cultivation aspects using different types of fertilizer on plant height, fruit weight, number of fruits, and the percentage of disease intensity of Colletotrichum spp. were analyzed. The results of this study shown that four isolates of fungi have been identified such as Penicillium sp., Aspergillus flavus, T. viride, and C. capsici. In vitro analysis shown the ability of T. viride to suppress the growth of the C. capsici  up to 71%. The fungus T. viride with a density of 7×106 CFU/mL can suppress the development of anthracnose by 59 to 87% under screen house conditions. However, under field conditions, the fungus T. viride was not able to suppress the development of anthracnose. Agronomic aspects such as plant height, number of fruits and production, and productivity of chili were not significantly effect on anthracnose.
PHYTOTOXICITY AND FIELD EFFICACY OF EXSEROHILUM LONGIROSTRA JC/MIN THE CONTROL OF BARNYARDGRASS ECOTYPES (ECHINOCHLOA CRUS-GALLI VAR. CRUS-GALLI(L.) BEAUV) JURAIMI, ABDUL SHUKOR; TASRIF, ARIFIN; KADIR, JUGAH; NAPIS, SUHAIMI; SASTROUTOMO, SOETIKNO SLAMET
BIOTROPIA No. 24 (2005)
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (368.348 KB) | DOI: 10.11598/btb.2005.0.24.172

Abstract

Five selected ecotypes of bamyardgrass (Echinochloa crus-galli var. crus-gatti) from several rice growing areas in Malaysia and Indonesia were tested for their susceptibility  to the potential bioherbicide  (Exserohilum longirostratum). Bamyardgrass seedlings at the 2-3-lcaf stage were treated with 2.5xl07 conidia/ml from E. longirostratum  at different application frequencies (single, double and triple). In addition, aqueous extract assays were evaluated for the presence of a phytotoxic compound responsible for the virulence of the bioherbicide. Results of the study showed that disease severity significantly increased 20 days after treatment and resulted in mortality of the seedlings. Ecotypes from Perak and Lampung were most susceptible to the bioherbicide upon triple applications. Percentage dry weight reductions were 86.34 and 83.14%, respectively. Other ecotypes (Melaka, Banten and South Sulawesi) were observed to have a relatively similar response. Moreover, aqueous extracts of E. longirostratum  increased mortality up to 92.50% of bamyardgrass seedlings. These findings suggest that regular (double and triple) applications of E. longirostratum at a concentration of 2.5xl07 conidia/ml significantly increased mortality among bamyardgrass ecotypes. Mortality of the seedlings was attributed to the presence of a secondary phytotoxic metabolite. Key words :    Field efficacy / Phytotoxicity / Exserohilum longirostratum I Echinochloa crus-galli var. crusgalli I ecotypes.
MORPHOLOGICAL VARIATION OF THE ECOTYPES OF Echinochloa crus-galli var crus-galli (L). Beauv (Barnyard grass: Poaceae) IN MALAYSIA and INDONESIA SASTROUTOMO, SOET1KNO S; JURAIMI, ABDUL SHUKOR; KADIR, JUGAH; NAPIS, SUHAIMI; TASRIF, ARIFIN
BIOTROPIA No. 22 (2004)
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (667.039 KB) | DOI: 10.11598/btb.2004.0.22.206

Abstract

Greenhouse experiments were conducted to examine the morphological traits of barnyard grass ecotypes from diverse geographic origin. Seeds (caryopsis) were collected from 17 locations of  rice fields throughout Malaysia (11 states) and Indonesia (six provinces) and were grown in pots each  containing 10 kg of paddy field soil. The experiments were arranged using completely randomized design (CRD) with five  replicates. Mean separation was calculated using Duncan multiple range test at 5% probability level. Unweighted pair-group method of arithmetic averages (UPGMA) was performed to determine the individual relationship within ecotypes of barnyard grass. Twelve morphological traits such as culm, panicle, leaf, and spikelet traits were measured. The growth characters such as emergence date, heading time, and growth duration were also evaluated. The average of emergence date, heading time, and growth duration of barnyard grass collected from Perils, Kedah, Penang, and Johor were relatively earlier than other ecotypes. Six groups were classified based on the cluster analysis of Malaysian ecotypes of barnyard grass. Principal component  indicated that group six was found to be highly variable compared to others. While three groups were identified in Indonesian ecotypes of barnyard grass. Group one was observed to be highly variable. Results demonstrated that morphological variation among  ecotypes of barnyard grass showing differences between the two regions illustrate the role of geographic variation. Key words : Variation / ecotypes / paddy field weeds / barnyard grass.
Co-Authors Adirianto, Bayu Arif Nindyo Kisworo ENDANG KRISNAWATI Juraimi, Abdul Shukor KADIR, JUGAH SASTROUTOMO, SOET1KNO S SASTROUTOMO, SOETIKNO SLAMET Siswahyudianto Sugiharti, Dwi Suhaimi Napis Sulistyowati, Dwiwanti Yuliar Yuliar