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Aplikasi Antigen Bakteri Streptococcus Agalactiae Sebagai Kandidat Vaksin untuk Pencegahan Penyakit Streptococcosis pada Ikan Nila (Oreochromis Sp) Sri Dwi Hastuti
Jurnal Gamma Vol. 8 No. 2 (2013): Maret
Publisher : Jurnal Gamma

Show Abstract | Download Original | Original Source | Check in Google Scholar

Aplikasi Antigen Bakteri Streptococcus Agalactiae Sebagai Kandidat Vaksin untuk Pencegahan Penyakit Streptococcosis pada Ikan Nila (Oreochromis Sp)Applications bacteria Streptococcus agalactiae As Antigen Vaccine Candidate for Disease Prevention Streptococcosis in Tilapia (Oreochromis Sp)Sri Dwi HastutiJurusan Agribisnis, Fakultas Pertanian PeternakanUniversitas Muhammadiyah Malang Email: sridwihastuti@yahoo.comABSTRACTIn Indonesia, cases of disease caused by the bacterium Streptococcus sp attack many tilapia fish farming (Supriyadi, 2002), especially those caused by bacterial infection S, agalactiae. To cope with the bacterium Streptococcus infection in farmed fish are usually used antibiotics, but the continuous use of antibiotics and unwisely can lead to bacterial resistance and the impact on the environment. Therefore we need an alternative that is more effective disease control and safe is the vaccine development. During these existing vaccines are vaccines developed from bacterial cells inactivated with formalin or heating. The method used in this study is experimental, with a treatment method of vaccination by injection and orl. For the injection method of treatment dose vaccination 5 tested: 0, 50, 100, 150 and 200 mL / fish tail. As for the oral doses used were 0, 5, 10, 15 and 20 mL / fish. The design used was CRD with each of 3 replications. The results showed that the injection method is better in meproteksi fish against bacterial attack S.agalactiae, because it can provide up to 100% survival after challenge test. The highest antibody titers obtained in the method of injection at a dose of 50 mL, whereas hematocrit and best phagocytic activity at a dose of 200 mL, and the highest leukocrit at a dose of 100 mL. At oral methods can only protect from SR only up 46.67% were obtained at a dose of 20 mL, while for hematocrit and best phagocytic activity at doses of 10 mL, and leukocrit highest in the control treatment.Keywords: Streptococcus bacteria, vaccines, TilapiaABSTRAKDi Indonesia, kasus penyakit yang disebabkan oleh bakteri Streptococcus sp serangan budidaya ikan nila banyak (Supriyadi, 2002), terutama yang disebabkan oleh infeksi bakteri S, agalactiae. Untuk mengatasi infeksi bakteri Streptococcus pada ikan budidaya biasanya digunakan antibiotik, namun terus digunakan antibiotik dan tidak bijaksana dapat menyebabkan resistensi bakteri dan dampak terhadap lingkungan. Oleh karena itu kita perlu alternatif yang pengendalian penyakit yang lebih efektif dan aman adalah pengembangan vaksin. Selama ini vaksin yang ada vaksin yang dikembangkan dari sel-sel bakteri tidak aktif dengan formalin untuh atau pemanasan. Metode yang digunakan dalam penelitian ini adalah eksperimental, dengan metode pengobatan vaksinasi melalui suntikan dan ORL. Untuk metode injeksi pengobatan dosis vaksinasi 5 diuji: 0, 50, 100, 150 dan 200 mL / ekor ikan. Adapun dosis oral yang digunakan adalah 0, 5, 10, 15 dan 20 mL / ikan. Desain yang digunakan adalah acak lengkap dengan masing-masing 3 ulangan. Hasil penelitian menunjukkan bahwa metode injeksi yang lebih baik ikan meproteksi terhadap serangan bakteri S.agalactiae, karena dapat memberikan hingga 100% bertahan hidup setelah uji tantang. Titer antibodi tertinggi diperoleh pada metode injeksi dengan dosis 50 ml, sedangkan hematokrit dan aktivitas fagosit terbaik dengan dosis 200 mL, dan leukocrit tertinggi pada dosis 100 mL. Pada metode lisan hanya dapat melindungi dari SRnya hanya sampai 46.67% diperoleh dengan dosis 20 ml, sedangkan untuk hematokrit dan aktivitas fagosit terbaik pada dosis 10 ml, dan leukocrit tertinggi pada perlakuan kontrol.Kata kunci: bakteri Streptococcus, vaksin, nila

Suplementasi β-glucan dari ragi roti (Saccharomyces cerevisiae) dalam pakan terhadap aktivitas fagositosis, aktivitas NBT, total protein plasma dan aktivitas aglutinasi darah ikan nila (Orechromis niloticus) Sri Dwi Hastuti
Depik Vol 1, No 3 (2012): December 2012
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Abstract. Tilapia is an important fisheries comodity which intesively farmed in Indonesia. However, an intensive farming system of aquatic organism often lead to disease outbreak. Ones the disease emerged, it will be difficult to combat. The curing method by using antibiotics in aquatic organism will bring negative impacts, such as causing bacteria resistance and decline of aquatic environments. Therefore control of disease in aquatic organism should be done through preventive methods such as the use of β-glucan from baker’s yeast (Saccharomyces cerevisiae). It is widely known that yeast’ cell wall contain of immunostimulant substance namely β-glucan. This research was aimed to find the effect of different dose of β-glucan in diet toward the phagocytic activity, respiratory burst which is indicated by Nitroblue Tetrazolium (NBT) activity, total of protein plasm and agglutination activity of tilapia blood. Method used in this study was experiment by complete random design using five treatments triplicate. Those treatments were β-glucan 0; 2,5; 5; 7,5 and 10 ppmkg-1 diet. Result showed that the different dose of β-glucan in diet gave a significantly effect on the phagocytic activity and total of protein plasm, but not on respiratory burst (NBT activity). The highest phagocytic activity occured in treatment E (β-glucan 10 ppmkg-1 diet) with the value of phagocytic activity was 37,67%, whereas the highest of total of protein plasm was occured in treatment B (β-glucan 2,5 ppmkg-1 diet) with the value of 123,58 mgml-1. Keywords : Baker’s yeast, β-glucan, phagocytic and agglutination activity, NBT activity, total of protein plasm

Penggunaan berbagai asam organik dan bakteri asam laktat terhadap nilai nutrisi limbah ikan Hany Handajani; Sri Dwi Hastuti; Sujono .
Depik Vol 2, No 3 (2013): December 2013
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Abstract. Fish silage is a liquid product from fish by product preserved in acid, and could potentially be used as feedstuff. The fish sialge can be produced through both biological andchemical methods, however to date the the quality of result was low, therefore this study was crucially needed. The research objective was to acquire the right method to improve the nutritional quality of fish silage and produce cheap fish feed ingredients. The factorial completely randomized design was used in the study. The first treatment was the effect of various types of organic acids (formic acid, propionic acid, benzoic acid, sorbic acid, citric acid, acetic acid) and LAB (Lactobacillus casei) to fish silage quality. The second treatment was the effect fermentation time (3, 7 and 14 days) to fish silage quality. The results showed that the highest protein content (45.95%) was occured on treatment using L. casei with fermentation time of 14 days. The highest fat content (5.87%) wasfound on treatment using L. casei with fermentation time of 14 days. In addition, the lower protein content (30.02%) is occured on treatment using propionic acid with fermentation time of 3 days, while the lowest fat content (4.77%) was occured on treatment using benzoic acid with fermentation time of 3 days. It was concluded that the best quality of fish silage was occured on treatment using L. casei with fermentation time of 14 days.Keywords : fish silage; organic acid; LAB Abstrak. Silase ikan merupakan produk cair dari ikan-ikan yang terbuang/rucah yang diawetkan dalam suasana asam, dan berpotensi digunakan sebagai bahan baku pakan ikan. Pembuatan silase ikan dapat dilakukan dengan cara biologis maupun kimia, dan sampai saat ini belum didapatkan metode yang optimal, sehingga mendapatkan kualitas silase ikan yang tinggi. Tujuan penelitian adalah memperoleh teknologi yang tepat untuk meningkatkan kualitas nutrisi silase limbah ikan dan menghasilkan bahan baku pakan ikan yang murah, mudah didapat dan berkualitas. Rancangan percobaan yang digunakan adalah rancangan acak lengkap pola faktorial. Perlakuan pertama adalah pemberian berbagai jenis asam organik (asam formiat, asam propionat, asam benzoat, asam sorbat, asam sitrat, asam asetat) dan BAL (Lactobacillus casei). Perlakuan kedua adalah waktu fermentasi (3, 7 dan 14 hari). Hasil penelitian menunjukkan bahwa kandungan protein tertinggi (45,95%) pada silase ikan menggunakan L. casei, waktu fermentasi 14 hari. Kandungan lemak tertinggi (5,87%) pada silase ikan menggunakan L. casei, waktu fermentasi 14 hari. Kandungan protein terendah (30,02%) pada silase ikan dengan menggunakan asam propionat waktu fermentasi 3 hari, kandungan lemak terendah (4,77%) pada silase ikan menggunakan asam benzoat waktu fermentasi 3 hari. Pembuatan silase ikan yang terbaik adalah dengan cara biologis menggunakan BAL (L. casei) dan waktu fermentasi 14 hari.Kata kunci :silase ikan; asam organik; BAL

Suplementasi β-glucan dari ragi roti (Saccharomyces cerevisiae) dalam pakan terhadap aktivitas fagositosis, aktivitas NBT, total protein plasma dan aktivitas aglutinasi darah ikan nila (Orechromis niloticus) Sri Dwi Hastuti
Depik Vol 1, No 3 (2012): December 2012
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.1.3.102

Abstract. Tilapia is an important fisheries comodity which intesively farmed in Indonesia. However, an intensive farming system of aquatic organism often lead to disease outbreak. Ones the disease emerged, it will be difficult to combat. The curing method by using antibiotics in aquatic organism will bring negative impacts, such as causing bacteria resistance and decline of aquatic environments. Therefore control of disease in aquatic organism should be done through preventive methods such as the use of β-glucan from baker’s yeast (Saccharomyces cerevisiae). It is widely known that yeast’ cell wall contain of immunostimulant substance namely β-glucan. This research was aimed to find the effect of different dose of β-glucan in diet toward the phagocytic activity, respiratory burst which is indicated by Nitroblue Tetrazolium (NBT) activity, total of protein plasm and agglutination activity of tilapia blood. Method used in this study was experiment by complete random design using five treatments triplicate. Those treatments were β-glucan 0; 2,5; 5; 7,5 and 10 ppmkg-1 diet. Result showed that the different dose of β-glucan in diet gave a significantly effect on the phagocytic activity and total of protein plasm, but not on respiratory burst (NBT activity). The highest phagocytic activity occured in treatment E (β-glucan 10 ppmkg-1 diet) with the value of phagocytic activity was 37,67%, whereas the highest of total of protein plasm was occured in treatment B (β-glucan 2,5 ppmkg-1 diet) with the value of 123,58 mgml-1. Keywords : Baker’s yeast, β-glucan, phagocytic and agglutination activity, NBT activity, total of protein plasm

Penggunaan berbagai asam organik dan bakteri asam laktat terhadap nilai nutrisi limbah ikan Hany Handajani; Sri Dwi Hastuti; Sujono .
Depik Vol 2, No 3 (2013): December 2013
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.2.3.968

Abstract. Fish silage is a liquid product from fish by product preserved in acid, and could potentially be used as feedstuff. The fish sialge can be produced through both biological andchemical methods, however to date the the quality of result was low, therefore this study was crucially needed. The research objective was to acquire the right method to improve the nutritional quality of fish silage and produce cheap fish feed ingredients. The factorial completely randomized design was used in the study. The first treatment was the effect of various types of organic acids (formic acid, propionic acid, benzoic acid, sorbic acid, citric acid, acetic acid) and LAB (Lactobacillus casei) to fish silage quality. The second treatment was the effect fermentation time (3, 7 and 14 days) to fish silage quality. The results showed that the highest protein content (45.95%) was occured on treatment using L. casei with fermentation time of 14 days. The highest fat content (5.87%) wasfound on treatment using L. casei with fermentation time of 14 days. In addition, the lower protein content (30.02%) is occured on treatment using propionic acid with fermentation time of 3 days, while the lowest fat content (4.77%) was occured on treatment using benzoic acid with fermentation time of 3 days. It was concluded that the best quality of fish silage was occured on treatment using L. casei with fermentation time of 14 days.Keywords : fish silage; organic acid; LAB Abstrak. Silase ikan merupakan produk cair dari ikan-ikan yang terbuang/rucah yang diawetkan dalam suasana asam, dan berpotensi digunakan sebagai bahan baku pakan ikan. Pembuatan silase ikan dapat dilakukan dengan cara biologis maupun kimia, dan sampai saat ini belum didapatkan metode yang optimal, sehingga mendapatkan kualitas silase ikan yang tinggi. Tujuan penelitian adalah memperoleh teknologi yang tepat untuk meningkatkan kualitas nutrisi silase limbah ikan dan menghasilkan bahan baku pakan ikan yang murah, mudah didapat dan berkualitas. Rancangan percobaan yang digunakan adalah rancangan acak lengkap pola faktorial. Perlakuan pertama adalah pemberian berbagai jenis asam organik (asam formiat, asam propionat, asam benzoat, asam sorbat, asam sitrat, asam asetat) dan BAL (Lactobacillus casei). Perlakuan kedua adalah waktu fermentasi (3, 7 dan 14 hari). Hasil penelitian menunjukkan bahwa kandungan protein tertinggi (45,95%) pada silase ikan menggunakan L. casei, waktu fermentasi 14 hari. Kandungan lemak tertinggi (5,87%) pada silase ikan menggunakan L. casei, waktu fermentasi 14 hari. Kandungan protein terendah (30,02%) pada silase ikan dengan menggunakan asam propionat waktu fermentasi 3 hari, kandungan lemak terendah (4,77%) pada silase ikan menggunakan asam benzoat waktu fermentasi 3 hari. Pembuatan silase ikan yang terbaik adalah dengan cara biologis menggunakan BAL (L. casei) dan waktu fermentasi 14 hari.Kata kunci :silase ikan; asam organik; BAL

Suplementasi β-glucan dari ragi roti (Saccharomyces cerevisiae) dalam pakan terhadap aktivitas fagositosis, aktivitas NBT, total protein plasma dan aktivitas aglutinasi darah ikan nila (Orechromis niloticus) Sri Dwi Hastuti
Depik Vol 1, No 3 (2012): December 2012
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.1.3.102

Abstract. Tilapia is an important fisheries comodity which intesively farmed in Indonesia. However, an intensive farming system of aquatic organism often lead to disease outbreak. Ones the disease emerged, it will be difficult to combat. The curing method by using antibiotics in aquatic organism will bring negative impacts, such as causing bacteria resistance and decline of aquatic environments. Therefore control of disease in aquatic organism should be done through preventive methods such as the use of β-glucan from baker’s yeast (Saccharomyces cerevisiae). It is widely known that yeast’ cell wall contain of immunostimulant substance namely β-glucan. This research was aimed to find the effect of different dose of β-glucan in diet toward the phagocytic activity, respiratory burst which is indicated by Nitroblue Tetrazolium (NBT) activity, total of protein plasm and agglutination activity of tilapia blood. Method used in this study was experiment by complete random design using five treatments triplicate. Those treatments were β-glucan 0; 2,5; 5; 7,5 and 10 ppmkg-1 diet. Result showed that the different dose of β-glucan in diet gave a significantly effect on the phagocytic activity and total of protein plasm, but not on respiratory burst (NBT activity). The highest phagocytic activity occured in treatment E (β-glucan 10 ppmkg-1 diet) with the value of phagocytic activity was 37,67%, whereas the highest of total of protein plasm was occured in treatment B (β-glucan 2,5 ppmkg-1 diet) with the value of 123,58 mgml-1. Keywords : Baker’s yeast, β-glucan, phagocytic and agglutination activity, NBT activity, total of protein plasm

Penggunaan berbagai asam organik dan bakteri asam laktat terhadap nilai nutrisi limbah ikan Hany Handajani; Sri Dwi Hastuti; Sujono .
Depik Vol 2, No 3 (2013): December 2013
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.2.3.968

Abstract. Fish silage is a liquid product from fish by product preserved in acid, and could potentially be used as feedstuff. The fish sialge can be produced through both biological andchemical methods, however to date the the quality of result was low, therefore this study was crucially needed. The research objective was to acquire the right method to improve the nutritional quality of fish silage and produce cheap fish feed ingredients. The factorial completely randomized design was used in the study. The first treatment was the effect of various types of organic acids (formic acid, propionic acid, benzoic acid, sorbic acid, citric acid, acetic acid) and LAB (Lactobacillus casei) to fish silage quality. The second treatment was the effect fermentation time (3, 7 and 14 days) to fish silage quality. The results showed that the highest protein content (45.95%) was occured on treatment using L. casei with fermentation time of 14 days. The highest fat content (5.87%) wasfound on treatment using L. casei with fermentation time of 14 days. In addition, the lower protein content (30.02%) is occured on treatment using propionic acid with fermentation time of 3 days, while the lowest fat content (4.77%) was occured on treatment using benzoic acid with fermentation time of 3 days. It was concluded that the best quality of fish silage was occured on treatment using L. casei with fermentation time of 14 days.Keywords : fish silage; organic acid; LAB Abstrak. Silase ikan merupakan produk cair dari ikan-ikan yang terbuang/rucah yang diawetkan dalam suasana asam, dan berpotensi digunakan sebagai bahan baku pakan ikan. Pembuatan silase ikan dapat dilakukan dengan cara biologis maupun kimia, dan sampai saat ini belum didapatkan metode yang optimal, sehingga mendapatkan kualitas silase ikan yang tinggi. Tujuan penelitian adalah memperoleh teknologi yang tepat untuk meningkatkan kualitas nutrisi silase limbah ikan dan menghasilkan bahan baku pakan ikan yang murah, mudah didapat dan berkualitas. Rancangan percobaan yang digunakan adalah rancangan acak lengkap pola faktorial. Perlakuan pertama adalah pemberian berbagai jenis asam organik (asam formiat, asam propionat, asam benzoat, asam sorbat, asam sitrat, asam asetat) dan BAL (Lactobacillus casei). Perlakuan kedua adalah waktu fermentasi (3, 7 dan 14 hari). Hasil penelitian menunjukkan bahwa kandungan protein tertinggi (45,95%) pada silase ikan menggunakan L. casei, waktu fermentasi 14 hari. Kandungan lemak tertinggi (5,87%) pada silase ikan menggunakan L. casei, waktu fermentasi 14 hari. Kandungan protein terendah (30,02%) pada silase ikan dengan menggunakan asam propionat waktu fermentasi 3 hari, kandungan lemak terendah (4,77%) pada silase ikan menggunakan asam benzoat waktu fermentasi 3 hari. Pembuatan silase ikan yang terbaik adalah dengan cara biologis menggunakan BAL (L. casei) dan waktu fermentasi 14 hari.Kata kunci :silase ikan; asam organik; BAL

Potential of Nematophagous Fungi from Kutalimbaru, North Sumatra, Indonesia, as Biological Control Agents to Manage Root Knot Nematodes, Meloidogyne incognita Simanjuntak, Wira Risa Lina; Hastuti, Liana Dwi Sri; Yurnaliza, Yurnaliza
Jurnal Proteksi Tanaman (Journal of Plant Protection) Vol. 9 No. 1 (2025): June 2025
Publisher : Plant Protection Department, Faculty of Agriculture, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jpt.9.1.26-37.2025

Root-knot nematodes (RKN), especially Meloidogyne incognita, are one of the most damaging and widespread plant-parasitic nematodes (PPNs) in cultivated plants worldwide. The intensive application of chemical nematicides in controlling these pests raises environmental and ecological concerns, prompting the need for sustainable alternatives. This study aimed to isolate and evaluate the predatory potential of indigenous nematode-trapping fungi (NTF) from the rhizosphere soils of healthy tomato plants against M. incognita under in vitro conditions. Soil samples were processed using the soil sprinkle technique, and fungal isolates capable of forming traps were screened by exposing them to second-stage juvenile (J2) of M. incognita. This study isolated 20 nematophagous fungi that have antagonistic activity against M. incognita from the rhizosphere soil of tomato plants. Among these, four isolates were identified as nematode-trapping fungi, with TRK 04 showing the highest predation efficacy, followed by TRK 07, TRK 09, and TRK 16. All four isolates were identified as part of the Arthrobotrys genus. These findings highlight the potential of indigenous nematophagous fungi as sustainable biocontrol agents for managing root-knot nematodes. Their application could support the development of environmentally friendly agricultural practices and reduce reliance on chemical nematicides. Further, in vivo studies are recommended to validate their efficacy under field conditions.

Skrining Actinomycetes Penghasil L-asparginase dari Pantai Olo, Sumatera Utara dan Uji Aktivitas Enzim Hartini, Martha Yeni Sry; Yurnaliza; Hastuti, Liana Dwi Sri
Bioscientist : Jurnal Ilmiah Biologi Vol. 13 No. 3 (2025): September
Publisher : Department of Biology Education, FSTT, Mandalika University of Education, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/bioscientist.v13i3.17133

This research aims to isolate actinomycetes that produce the enzyme L-asparaginase from Olo Beach and to determine the activity of the L-asparaginase enzyme produced. Actinomycetes producing the enzyme L-asparaginase were obtained through the following steps: isolation on SCA medium using the spread plate method; selection of L-asparaginase-producing actinomycetes on M-9 liquid medium with phenol red as a color indicator; production of L-asparaginase based on the principle of fermentation in production medium, followed by measurement of L-asparaginase activity and protein content. Protein content was determined using the Lowry method with Bovine Serum Albumin (BSA) as the standard. The data obtained were analyzed using ammonia and BSA standard curves. The results showed that 11 actinomycetes isolates from Olo Beach were capable of producing L-asparaginase. Qualitative selection showed a change in media color from yellow to pink, indicating the presence of L-asparaginase activity. Quantitatively, the highest L-asparaginase enzyme activity was 40.688 U/mL and the highest specific activity was 123,677 U/mg, found in isolate SPO 6. The lowest enzyme activity was 31,651 U/mL and the lowest specific activity was 25,874 U/mg. Specific activity is influenced by enzyme activity and protein content.

Ulitization of Oil Palm Empty Bunches Waste as a Growth Media for Straw Mushrooms Hastuti, Liana Dwi Sri; Munir, Erman; Tanjung, Rendra Syahputra; Ningrum, Iradani Yupita
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 6 No. 1 (2021): ABDIMAS TALENTA : Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Straw Mushroom (Volvariella volvaceae) as well asmushrooms edible otherhave been developed in Indonesia, including North Sumatra as a substitute for animal protein. Mushrooms or also known as button mushrooms are vegetables that are recognized to have high nutritional value, and are even believed to have medicinal properties for various types of diseases so that they have a fairly high selling value. Some studies report that in 100 grams of mushroom, only 0.17% fat is contained and even better, this fat is not bad fat. Seeing the high demand because of its nutritional value, and its rich content, its taste that is liked by many people, mushroom cultivation has a very promising market value. Basically until now the demand for mushroom continues to increase, but farmers have not been able to meet market needs. good quality start to be limited. Some farmers have started to switch to alternative planting media which is currently mostly practiced, namely oil palm pulp or empty palm oil bunches (TKKS). EFB is a waste that is very easy and is found mostly around palm oil processing factories, whose use has been limited so far as heating materials for boilers and particle wood, many empty bunches have not been utilized. This service aims to provide training in the form of mushroom cultivation using TKKS, as well as provide training in the form of post-harvest handling which is important given the lack of understanding of farmers in production and marketing activities.

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