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EFEKTIVITAS FORMULASI BIOHERBISIDA EKSTRAK BUAH LERAK DENGAN PENAMBAHAN ADJUVAN TERHADAP PERKECAMBAHAN GULMA Ludwigia octovalvis Pujisiswanto, Hidayat; Sunyoto, Sunyoto; Sriyani, Nanik; Pratiwi, Melinda Tri
JURNAL AGROTROPIKA Vol 19, No 2 (2020): JURNAL AGROTROPIKA VOL.19 NO. 2, Oktober 2020
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/ja.v19i2.4546

The abundance of weeds in cultivated land can directly inhibit competition of plants growth. Weed control using bioherbicides is one of eco-friendly alternative. This research aims to determine the bioherbicide formulation of lerak fruit extract with the addition of adjuvants which can inhibit the germination of Ludwigia octovalvis. The research was conducted at the Weed Laboratory of the Faculty of Agriculture, University of Lampung in December 2019 - March 2020. The researcher used Complete Randomized Design (CRD) with four replications.Â The research treatments consisted of lerak fruit extract + KAO adjuvant, lerak fruit extract + VCO, lerak fruit extract + Tween, pure lerak fruit extract, and control (aquades).Â The results showed that the application of 50% (500 g / l) lerak fruit extract with the addition of VCO, KAO, and Tween adjuvants at a concentration of 2% (20 ml/l) was able to inhibit weed germination Ludwigia octovalvis by 95%-100%. The application of lerak fruit extract with the addition of a 2% concentration of VCO adjuvant was the most effective in inhibiting weed germination Ludwigia octovalvis.Â Keywords : adjuvants, Bioherbicide, Sapindus rarak, Ludwigia octovalvis, weed

PENGARUH PUPUK KANDANG KAMBING DAN SAPI TERHADAP PERTUMBUHAN Azolla microphylla Arif, Faiz Al; Susanto, Herry; Pujisiswanto, Hidayat
JURNAL AGROTROPIKA Vol 20, No 1 (2021): Jurnal Agrotropika Vol 20 No 1, Mei 2021
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/ja.v20i1.4740

Azolla microphyllais a type of small fern that lives in the waters. One of the benefits of this plant is as an organic fertilizer in lowland rice cultivation. Considering its population in nature is decreasing while the use is increasing, it is necessary to conduct a research how to increase the growth and population of A. microphylla. The research was conducted at the Greenhouse and Weed Science Laboratory of the Faculty of Agriculture, University of Lampung from March to April 2020. The study used a completely randomized design (CRD) with four replications and six treatments so that there were 24 experimental units. As growing media, soil and 10.5 liters of water are filled in a tray measuring 30 cm x 35 cm. The treatments were KO = without manure, K1 = goat manure 42 g, K2 = goat manure 31,5 g plus cattle manure 10,5 g, K3 = goat manure 21 g plus cattle manure 21 g, K4 = goat manure 10,5 g plus cattle manure 31,5 g, and K5 cattle manure 42 g that added in 10,5 liters of water. Homogeneity of data was tested using the Bartlett test, the additivity was tested with the Tukey test. The mean was tested with the least significant difference (LSD) at 5% level. The results showed that the use of goat and cattle manures and the its mixture increased the growth and development of Azolla microphylla. The mixture of goat manure 21 g and cattle manure 21 g / 10.5 liters water is the best treatment for population growth of Azolla microphylla. Â Keywords: Azolla microphylla, growth, manure, mixture, population

Pengaruh Ekstrak Buah Lerak (Sapindus rarak) dan Beberapa Adjuvan terhadap Perkecambahan Gulma Fimbristylis miliacea Pujisiswanto, Hidayat; Nurmiaty, Yayuk; Sriyani, Nanik; Efrima, Annisa
JURNAL AGROTROPIKA Vol 20, No 2 (2021): Oktober 2021
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/ja.v20i2.5205

Adjuvant is an ingredient added in a formulation to increase the effectiveness of lerak fruit in inhibiting weeds. This study aims to determine the type of adjuvant in lerak fruit extract that can increase the inhibition of germination of Fimbristylis miliacea and to determine the type of adjuvant in lerak fruit extract that is most effective in inhibiting the germination of F. miliacea. The research was conducted from December 2019 to March 2020 in the Weed Laboratory, Faculty of Agriculture, University of Lampung. This study used a Completely Randomized Design (CRD) to determine the type of adjuvant given to lerak fruit extract on F. miliacea germination with 4 replications. The treatments consisted of lerak fruit extract, lerak fruit extract + VCO adjuvant, lerak fruit extract + KAO adjuvant, lerak fruit extract + Polysorbate 80 adjuvant, and control. The Bartlett test was used to test the homogeneity of variance, if the assumptions of the analysis of variance were met, then the mean value of the treatment was continued with the Least Significant Difference (LSD) test at the 5% level. The results showed that adjuvants and without adjuvants added to lerak fruit extract at a concentration of 50% (500 g/l) were able to suppress the percentage of germination and the speed of germination of Fimbristylis miliace seeds.Keywords: adjuvants, lerak fruit extract, Fimbristylis miliacea, weed

Efikasi Herbisida Parakuat Diklorida terhadap Gulma pada Kebun Kelapa Sawit (Elaeis guineensis Jack.) Belum Menghasilkan (TBM) Pujisiswanto, Hidayat; Putri, Athmarratu Wintani; Evizal, Rusdi; Sriyani, Nanik
JURNAL AGROTROPIKA Vol 22, No 2 (2023): Jurnal Agrotropika Vol 22 No 2, Oktober 2023
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/ja.v22i2.7686

Pertumbuhan gulma pada kebun kelapa sawit (Elaeis guineensis Jacq.) dapat merugikan pertumbuhan tanaman sehingga perlu dilakukan pengendalian. Salah satu alternatif untuk mengendalikan gulma dengan menggunakan herbisida parakuat diklorida. Penelitian ini bertujuan untuk mengetahui efikasi herbisida parakuat diklorida terhadap gulma pada tanaman kelapa sawit. Penelitian dilaksanakan pada bulan September-November 2022 di Desa Sido Mukti, Kecamatan Natar, Kabupaten Lampung Selatan dan Laboratorium Ilmu Gulma Universitas Lampung. Penelitian menggunakan Rancangan Acak Kelompok (RAK) dengan 6 perlakuan dan 4 ulangan. Perlakuan yang ditetapkan yaitu Parakuat diklorida 276 g/l dosis 621 g/ha, Parakuat diklorida 276 g/l dosis 828 g/ha, Parakuat diklorida 276 g/l dosis 1.035 g/ha, Parakuat diklorida 276 g/l dosis 1.242 g/ha, penyiangan manual dan Kontrol (tanpa pengendalian gulma). Uji homogenitas ragam data dilakukan dengan uji Barlett, uji aditivitas dengan menggunakan uji Tukey. Jika syarat asumsi memenuhi, maka data dianalisis dengan sidik ragam dan untuk menguji perbedaan nilai tengah dilakukan dengan uji Beda Nyata Terkecil (BNT) pada taraf 5%. Hasil penelitian menunjukkan Herbisida parakuat diklorida pada dosis 621 g/ha – 1.242 g/ha efektif mengendalikan pertumbuhan gulma total, gulma golongan daun lebar, gulma dominan Praxelis clematidea, Borreria alata, dan Paspalum conjugatum. Sedangkan pada taraf dosis 828 g/ha – 1.242 g/ha efektif mengendalikan gulma golongan rumput, gulma dominan Digitaria ciliaris, dan Eleusine indica. Koefisien komunitas (C) pada 4 dan 8 minggu setelah aplikasi menunjukkan nilai < 75% yang menunjukkan perbedaan antar komunitas perlakuan. Aplikasi herbisida parakuat diklorida pada piringan tanaman kelapa sawit belum menghasilkan tidak menimbulkan keracunan pada tanaman kelapa sawit. Kata kunci: Fitotoksisitas, herbisida, parakuat diklorida, gulma, kelapa sawit

Efikasi Herbisida Metil Metsulfuron terhadap Pertumbuhan Gulma pada Budidaya Kelapa Sawit (Elaeis guineensis Jacq.) Tanaman Belum Menghasilkan (TBM) Villian, Jimmy; Pujisiswanto, Hidayat; Evizal, Rusdi; Sriyani, Nanik
JURNAL AGROTROPIKA Vol 23, No 2 (2024): Jurnal Agrotropika Vol 23 No 2, Oktober 2024
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/ja.v23i2.7833

The oil palm plant which has the Latin name Elaeis guineensis Jacq. is one of the main plantation commodities in Indonesia. The growth of weeds on oil palm cultivation land causes competition for growth facilities and affects the growth of oil palm plants (TBM). One of the active ingredients of herbicides used to control weeds in TBM oil palm plantations is metsulfuron methyl herbicide. This study aims to determine the effective dose of 20% metsulfuron methyl herbicide in suppressing weed growth in TBM oil palm plants, to determine changes in the composition of weed species that grow after the application of metsulfuron methyl herbicide, to determine the effect of phytotoxicity on TBM oil palm plants due to herbicide application. This research was conducted in an oil palm plantation in Braja Lebah Village, Braja Selebah District, East Lampung Regency and the Laboratory of Weed Science, Faculty of Agriculture, University of Lampung from August to December 2022. This study used a Randomized Block Design (RAK) with 6 treatments 6 and 4 replications with metsulfuron methyl dose as follows 15; 20; 25; 30g/ha; mechanical weeding and control. The homogeneity of the variance of the data was tested by Barlett's test and the additivity of the data was tested by using the Tukey test and the difference in the mean treatment was tested by the Least Significant Difference (LSD) test at the 5% level. The research results show that; (1) The herbicide methyl metsulfuron 20% at a dose of 15 – 30 g/ha is effective in controlling the growth of total weeds, the dominant weeds Asystasia gangetica and Praxelis climatidea, Boreria alata, Melastoma malabathricum and Richardia brasiliensis up to 12 MSA; (2) Metsulfuron Methyl Herbicide 20% at a dose of 15 – 30 g/ha caused a change in weed composition at 4, 8, and 12 MSA; (3) The application of 20% metsulfuron methyl herbicide at a dose of 15–30 g/ha does not cause poisoning in TBM oil palm plants. Keywords : efficacy, herbicide, oil palm, metsulfuron methyl

Efikasi Herbisida Isopropil Amina Glifosat 480 g/l Terhadap Gulma Pada Persiapan Lahan Sawah Dengan Sistem Tanpa Olah Tanah Dan Pengaruhnya Terhadap Tanaman Padi Rifa'i, Thaher; Susanto, Herry; Nurmauli, Niar; Pujisiswanto, Hidayat
JURNAL AGROTROPIKA Vol 22, No 2 (2023): Jurnal Agrotropika Vol 22 No 2, Oktober 2023
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/ja.v22i2.7689

One of the efforts to control weeds in preparing land for lowland rice cultivation with the No-Tillage system one of which uses isopropylamineglyphosate herbicide. The purpose of this study was to determine the dose of glyphosate herbicide that effectively controls weeds for preparation of lowland rice planting with the no tillage system, to determine changes in weed composition in lowland rice after the application of glyphosate herbicide, and to determine the effect of the no tillage system after the application of glyphosate herbicide on growth and paddy yields. Data collection was carried out from June to September 2022 in the rice fields of Trimurjo District, Central Lampung Regency and the Weed Science Laboratory, Faculty of Agriculture, University of Lampung. The treatment was arranged using a randomized block design with 4 replications and 6 treatments consisting of the glyphosate herbicide doses (1,080; 1,440; 1,800; 2,160 g/ha) + no tillage, manual weeding, and intensive tillage system. Homogeneity of variance was tested by Barlett's test and then analyzed for variance. Separation of the mean was carried out using the least significant difference test (LSD) at the 5% level. The results showed that the herbicide isopropylamine glyphosate doses of 1,800 and 2,160 g/ha of the no tillage system could be used to replace the intensive tillage system because it was effective in controlling total weeds, sedges, grasses, and broad leaf groups, dominant weed Fimbristylis miliacea, Echinochloa colonum, Ludwigia octovalvis and Monochoria vaginalis up to 6 WAP, causing a change in the composition of weed species from Echinochloa colonum become monochoria vaginalis at 3 WAP, and from Echinochloa colonum become Ludwigia octovalvis at 6 WAP. The growth is not stunted and yield of lowland rice plants is equivalent to the intensive tillage system with grain yields per hectare of 5.14 - 5.49 t/ha. Key words : weeds, isopropylamine glyphosate, paddy field, no tillage

EFIKASI HERBISIDA PARAKUAT DIKLORIDA 276 g/l TERHADAP PENGENDALIAN GULMA PADA BUDIDAYA KAKAO BELUM MENGHASILKAN Susanto, Herry; Aslamiah, Aslamiah; Evizal, Rusdi; Pujisiswanto, Hidayat
JURNAL AGROTROPIKA Vol 24, No 1 (2025): Jurnal Agrotropika Vol 24 No 1, Mei 2025
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/ja.v24i1.10495

The growth of weeds in immature cocoa plants is highly susceptible to competition for water, nutrients, and light, which can disrupt the growth of cocoa plants. Efforts to manage cocoa cultivation include weed control using the chemical herbicide paraquat dichloride, a non-selective contact herbicide. This study aimed to determine the effective dosage of paraquat dichloride for controlling weeds in immature cocoa plants, changes in weed composition, and phytotoxicity on immature cocoa plants following the application of paraquat dichloride. The study was conducted in Talang Sepuh Village, Talang Padang Sub-district, Tanggamus Regency, from March–May 2024. The research employed a Randomized Complete Block Design (RCBD) with six treatments and four replications. Treatments included paraquat dichloride at doses of 414 g/ha, 552 g/ha, 690 g/ha, 828 g/ha, mechanical weeding, and a control group (no weed control). Data variance homogeneity was tested using Bartlett's test, and data additivity was evaluated with Tukey's test. If the assumptions were met, the mean difference was analyzed using the Least Significant Difference (LSD) test at a 5% significance level. The results indicated that paraquat dichloride at doses of 414–828 g/ha effectively controlled total weeds, broadleaf weeds, and dominant weeds (Eleusine indica, Praxelis clematidea, and Synedrella nodiflora). Meanwhile, doses of 552–828 g/ha were effective in controlling grass weeds and dominant weeds (Ottochloa nodosa and Asystasia gangetica). The application of paraquat dichloride did not alter weed composition and did not cause phytotoxic effects on immature cocoa plants..Keywords : Herbicide, Paraquat dichloride, Weed, Immature cocoa.

Pengaruh Ekstrak Daun Senduduk Bulu (Clidemia hirta L.) terhadap Perkecambahan dan Pertumbuhan Gulma (Praxelis clematidea) Lestari, Andriani Dwi; Pujisiswanto, Hidayat; Susanto, Herry; Sriyani, Nanik
JURNAL AGROTROPIKA Vol. 22 No. 1 (2023): Jurnal Agrotropika Vol 22 No 1, Mei 2023
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/ja.v22i1.7370

Weeds are plants whose existence is not expected by farmers because they interfere with cultivated plants. But there are weeds that can produce phenolic compounds such as Clidemia hirta L which can be used as bioherbicides. This study aims to determine the effect of Clidemia hirta L. leaf extract on the germination and growth of Praxelis clematidea weeds. The research was carried out from June 2021 to September 2021 at the Weed Science Laboratory and Integrated Field Laboratory, Faculty of Agriculture, University of Lampung. This study used a completely randomized design (CRD) method with 6 treatments with concentrations of Clidemia hirta L leaf extract, namely 0; 1.5; 3.0; 4.5; 6.0; and 7.5%. Each treatment was repeated 6 times to obtain 72 experimental units. The observed variables are germination, crown height, root length, dry weight, and weed poisoning level. The data obtained were analyzed by analysis of variance and continued with the Least Significant Difference Test (LSD) at the 5% level. The results showed that the germination of Praxelis clematidea weed was significantly inhibited by the treatment of Clidemia hirta L leaf extract with a concentration of 1.5; 3.0; 4.5; 6.0; and 7.5%. While concentrations of 3.0%, 4.5%, 6.0%, and 7.5% Clidemia hirta L. leaf extract inhibited the growth of Praxelis clematidea weeds in the greenhouse. Key words: Clidemia hirta L., extract, Praxelis clematidea, germination, growth

Efikasi Herbisida Parakuat Diklorida terhadap Gulma pada Kebun Kelapa Sawit (Elaeis guineensis Jack.) Belum Menghasilkan (TBM) Pujisiswanto, Hidayat; Putri, Athmarratu Wintani; Evizal, Rusdi; Sriyani, Nanik
JURNAL AGROTROPIKA Vol. 22 No. 2 (2023): Jurnal Agrotropika Vol 22 No 2, Oktober 2023
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/ja.v22i2.7686

Pertumbuhan gulma pada kebun kelapa sawit (Elaeis guineensis Jacq.) dapat merugikan pertumbuhan tanaman sehingga perlu dilakukan pengendalian. Salah satu alternatif untuk mengendalikan gulma dengan menggunakan herbisida parakuat diklorida. Penelitian ini bertujuan untuk mengetahui efikasi herbisida parakuat diklorida terhadap gulma pada tanaman kelapa sawit. Penelitian dilaksanakan pada bulan September-November 2022 di Desa Sido Mukti, Kecamatan Natar, Kabupaten Lampung Selatan dan Laboratorium Ilmu Gulma Universitas Lampung. Penelitian menggunakan Rancangan Acak Kelompok (RAK) dengan 6 perlakuan dan 4 ulangan. Perlakuan yang ditetapkan yaitu Parakuat diklorida 276 g/l dosis 621 g/ha, Parakuat diklorida 276 g/l dosis 828 g/ha, Parakuat diklorida 276 g/l dosis 1.035 g/ha, Parakuat diklorida 276 g/l dosis 1.242 g/ha, penyiangan manual dan Kontrol (tanpa pengendalian gulma). Uji homogenitas ragam data dilakukan dengan uji Barlett, uji aditivitas dengan menggunakan uji Tukey. Jika syarat asumsi memenuhi, maka data dianalisis dengan sidik ragam dan untuk menguji perbedaan nilai tengah dilakukan dengan uji Beda Nyata Terkecil (BNT) pada taraf 5%. Hasil penelitian menunjukkan Herbisida parakuat diklorida pada dosis 621 g/ha – 1.242 g/ha efektif mengendalikan pertumbuhan gulma total, gulma golongan daun lebar, gulma dominan Praxelis clematidea, Borreria alata, dan Paspalum conjugatum. Sedangkan pada taraf dosis 828 g/ha – 1.242 g/ha efektif mengendalikan gulma golongan rumput, gulma dominan Digitaria ciliaris, dan Eleusine indica. Koefisien komunitas (C) pada 4 dan 8 minggu setelah aplikasi menunjukkan nilai < 75% yang menunjukkan perbedaan antar komunitas perlakuan. Aplikasi herbisida parakuat diklorida pada piringan tanaman kelapa sawit belum menghasilkan tidak menimbulkan keracunan pada tanaman kelapa sawit. Kata kunci: Fitotoksisitas, herbisida, parakuat diklorida, gulma, kelapa sawit

Efikasi Herbisida Isopropil Amina Glifosat 480 g/l Terhadap Gulma Pada Persiapan Lahan Sawah Dengan Sistem Tanpa Olah Tanah Dan Pengaruhnya Terhadap Tanaman Padi Rifa'i, Thaher; Susanto, Herry; Nurmauli, Niar; Pujisiswanto, Hidayat
JURNAL AGROTROPIKA Vol. 22 No. 2 (2023): Jurnal Agrotropika Vol 22 No 2, Oktober 2023
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/ja.v22i2.7689

One of the efforts to control weeds in preparing land for lowland rice cultivation with the No-Tillage system one of which uses isopropylamineglyphosate herbicide. The purpose of this study was to determine the dose of glyphosate herbicide that effectively controls weeds for preparation of lowland rice planting with the no tillage system, to determine changes in weed composition in lowland rice after the application of glyphosate herbicide, and to determine the effect of the no tillage system after the application of glyphosate herbicide on growth and paddy yields. Data collection was carried out from June to September 2022 in the rice fields of Trimurjo District, Central Lampung Regency and the Weed Science Laboratory, Faculty of Agriculture, University of Lampung. The treatment was arranged using a randomized block design with 4 replications and 6 treatments consisting of the glyphosate herbicide doses (1,080; 1,440; 1,800; 2,160 g/ha) + no tillage, manual weeding, and intensive tillage system. Homogeneity of variance was tested by Barlett's test and then analyzed for variance. Separation of the mean was carried out using the least significant difference test (LSD) at the 5% level. The results showed that the herbicide isopropylamine glyphosate doses of 1,800 and 2,160 g/ha of the no tillage system could be used to replace the intensive tillage system because it was effective in controlling total weeds, sedges, grasses, and broad leaf groups, dominant weed Fimbristylis miliacea, Echinochloa colonum, Ludwigia octovalvis and Monochoria vaginalis up to 6 WAP, causing a change in the composition of weed species from Echinochloa colonum become monochoria vaginalis at 3 WAP, and from Echinochloa colonum become Ludwigia octovalvis at 6 WAP. The growth is not stunted and yield of lowland rice plants is equivalent to the intensive tillage system with grain yields per hectare of 5.14 - 5.49 t/ha. Key words : weeds, isopropylamine glyphosate, paddy field, no tillage

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