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All Journal Agrotrop : Journal on Agriculture Science E-Jurnal Agroekoteknologi Tropika (Journal of Tropical Agroecotechnology)
DWI WIDANINGSIH
Jurusan/Prodi Agroekoteknologi Fakultas Pertanian Universitas Udayana
Agriculture, Biological Sciences & Forestry

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Asosiasi Lalat Buah (Bactrocera spp.) (Diptera : Tephritidae) dan Parasitoidnya pada Tanaman Jambu Biji Kristal (Psidium guajava L.) yang Dibudidayakan di Bali I WAYAN DEDI ADNYANA; NI NENGAH DARMIATI; DWI WIDANINGSIH
Agrotrop : Journal on Agriculture Science Vol 9 No 2 (2019)
Publisher : Fakultas Pertanian Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (392.706 KB) | DOI: 10.24843/AJoAS.2019.v09.i02.p01

Abstract

Association of Fruit Flies (Bactrocera spp.) (Diptera: Tephritidae) and Their Parasitoid on Guava (Psidium guajava L.) Cultivated in Bali. The study on the association of fruit flies (Bactrocera spp.) (Diptera: Tephritidae) and their parasitoid on guava (Psidium guajava L.) cultivated in Bali was conduted in order to know the abundance, attacks percentage and the species of parasitoid associated on guava, cultivated in Bali. The sampling was done intentionally by taking attacked fruit in Musi Village, Buleleng Regency; Pelaga Village, Badung Regency; and Tiga Village, Bangli Regency. The results showed that 3 species of fruit flies were found, namely B. carambolae, B. papayae and B. albistrigata. The percentage and number of adult insect emergence in Musi Village were B. papayae (50.87% ; 2772 imago), B. carambolae (35.18% ; 1803 imago) and B. albistrigata (13.94% ; 741 imago). In Pelaga Village B. carambolae (61.31% ; 2864 imago) dominates and B. papayae only 38.69% and 1801 imago. B. carambolae is also found dominant in Tiga Village (59.08% ; 2303 imago) and B. papayae only 40.92% and 1603 imago. Percentage of damage to guava is 24.27% on average. There are three species of parasitoids found that are associated with fruit flies on guava in Bali, namely Fopius arisanus, Diachasmimorpha sp. and Opius sp. The average parasitic rate is 6.76%. The highest parasitic rate is in Musi Village, Buleleng while the lowest is in Tiga Village, Bangli.
Keragaman Jamur yang Mengkontaminasi Beras dan Jagung di Pasar Tradisional Denpasar I GUSTI NGURAH BAGUS; DWI WIDANINGSIH; I MADE SUDARMA
Agrotrop : Journal on Agriculture Science Vol 7 No 1 (2017)
Publisher : Fakultas Pertanian Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (235.02 KB) | DOI: 10.24843/AJoAS.2017.v07.i01.p10

Abstract

The diversity of fungi that contaminate rice and corn in the traditional market of Denpasar. Rice and corn are food commodities consumed daily by the public, but the rice and corn has been contaminated by a fungus, during the process of transportation and storage of experience. So it appears the author wishes to examine how big fungus has contaminated rice and corn in the traditional market town of Denpasar. Research conducted at the Laboratory of Plant Pathology, from April to June 2016. Research carried out consisted of: (1) isolating fungi that contaminate the rice and corn, and identify microscopy morphological, and (2) determine the diversity index and dominance index, as well prevaliensi fungal contamination. Identify the genera level, using reference books Samson et al., 1981; Pitt dan Hocking, 1997; Barnett dan Hunter, 1998; dan Indrawati et al., 1999. The results showed that the fungus can contaminate both the rice and corn in the market Kereneng, Agung, Badung and Ketapaian were Aspergillus flavus, Aspergillus niger and Aspergillus spp. The highest prevalence of fungi that contaminate both the rice and maize are the A. flavus, 73.61 % and 92.96 % respectively. Index of diversity in rice and corn amounting to 0.742 0,302. Index of dominance in rice and maize respectively 0.581 and 0.867. Aflatoxins were found to have not reached the threshold tolerated (20 ppb) is in the rice at 0 ppb, while the largest corn at 2,133 ppb in Kereneng market.
Distribusi dan Kemampuan Adaptasi Spodoptera frugiperda (J. E Smith) (Lepidoptera: Noctuidae) Terhadap Tanaman Inang pada Beberapa Ketinggian Tempat di Bali PUTU SUSY LISTYAWATI; I NYOMAN WIJAYA; DWI WIDANINGSIH; I WAYAN SUPARTHA
Agrotrop : Journal on Agriculture Science Vol 12 No 1 (2022)
Publisher : Fakultas Pertanian Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/AJoAS.2022.v12.i01.p10

Abstract

Distribution and Adaptability of Fall Army Worm, Spodoptera frugiperda (J.E Smith) (Lepidoptera: Noctuidae) Against Host Plants at Several Altitudes in Bali. The armyworm pest (Spodoptera frugiperda J.E. Smith) was first discovered attacking maize plants in Sumatra in 2019.These pests move very quickly from a wide range of altitude and host plant, while in Bali only discovered this pest attack maize plants at an altitude <500 meters above sea level (masl). The purpose of this study was to determine the distribution map of S. frugiperda, to determine the population and host plants in the field and to determine the attack of S. frugiperda at several altitudes in Bali. This study used purposive survey method. Plant sampling was carried out in all regencies of Bali Province by means of diagonal sampling. The size of unit sample was2 x 2 m and the number of plants observed was 20 plants. The results showed that the pest S. frugiperda had spread in the highland up to (> 1000 masl) which attacked maize and sorghum in Bali. The distribution area of the pest are Tabanan, Badung, Gianyar, Klungkung, Karangasem, Bangli, Buleleng, Jembrana and Denpasar. The population of S. frugiperda was found until the highland (> 1000 masl) with a population of host plants is still low and spread at 5 altitude with type host plants found, sweet corn, glutinous corn, corn pipil, local corn and sorghum. he percentage of S. frugiperda attacks at 5 altitudes in Bali is 11.71% to 35.13%.
Kelimpahan Populasi Liriomyza spp. (Diptera: Agromyzidae) pada Sentra Tanaman Tomat dan Kentang di Bali GUSTI AYU INTAN ARI LESTARI; I NYOMAN WIJAYA; DWI WIDANINGSIH
Agrotrop : Journal on Agriculture Science Vol 13 No 2 (2023)
Publisher : Fakultas Pertanian Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/AJoAS.2023.v13.i02.p07

Abstract

Population Abundance of Liriomyza spp. (Diptera: Agromyzidae) at the Tomato and Potato Center in Bali. The study aims to understand the structure of the community, population, and to determine the relationship between population groups of Liriomyza spp. on tomato and potato plants in Bali. The research was conducted from September 2021 to February 2, 2022, at an altitude of 750-1250 masl, located in Tabanan Regency, Buleleng Regency, Badung Regency and Bangli Regency. The sampling method was purposive and the number of samples taken was 150-250 leaves per location. Identification of Liriomyza spp. carried out in the Laboratory of Integrated Pest Management, Faculty of Agriculture, Udayana University. The results showed that the population of Liriomyza spp. on various tomato and potato crops in the medium and highlands of Bali. The community structure of Liriomyza spp. varied on each plant in the medium and highlands in Bali, with a species diversity index and a low population index and moderate dominance index. The results showed that the population relationship of Liriomyza spp. on tomato and potato plants in Bali from the results of the Paired Sample T Test showed that the population of liriomyza spp. higher in tomato plants than in potato plants.
Pengaruh Pemberian Ekstrak Umbi Bawang Putih (Allium sativum L.) dan Pupuk Kascing Cair terhadap Serangan Hama pada Tanaman Kailan (Brassica oleracea var. Alboglabra) Saputra, Kelvin Indra; Adnyana, I Made Mega; Widaningsih, Dwi
Agrotrop : Journal on Agriculture Science Vol 14 No 2 (2024)
Publisher : Fakultas Pertanian Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/AJoAS.2024.v14.i02.p05

Abstract

The Influence of Garlic (Allium sativum L.) Extract and Liquid Vermicompost Fertilizer to the Attack of Insect on Kailan (Brassica oleracea var. Alboglabra) Plantation. Kailan plant (Brassica oleracea var. Alboglabra) known as Chinese broccoli is one of the vegetable cabbage (Brassicaceae) family. One of the factors is that reduce quantity and quality of kailan plants are a high of pest attacks. The aim of study is to determine the effect of garlic extract and liquid vermicompost fertilizer on the type and abundance of pest populations, index of diversity, intensity of damage and determine the most effective concentration of garlic (Allium sativum L.) and liquid vermicompost fertilizer. The research design as Randomized Block Design, with two treatment factors: garlic extract and liquid vermicompost fertilizer and level of concentration. Garlic extract was used as treatments, i.e 0g/l; 150g/l; and 300g/l. Liquid vermicompost fertilizer was used as treatments, i.e 0ml/plant; 10ml/plant; 20ml/plant; and 40ml/plant. Each treatment combination consists of 3 repetition so that there are 36 treatment of combination. The results showed that the dominant pests present in kailan plants are Atractomorpha crenulata and Plutella xylostella. The index of diversity in each treatment has a value of H<1 (Low). The treatments showed that as a single treatment has a significant effect. The treatments of 300g/l garlic extract and 40 ml/plant liquid vermicompodt fertilizer was the best concentration which gave on reduce the number of pest populations and intensity of damage also increased plant height and plant fresh weight, but there is no significant effect of interaction between both treatments.
Kelimpahan Populasi Hama Kutu Putih Phenacoccus manihoti Matile-Ferrero, Paracoccus marginatus Williams dan Granara De Willink (Hemiptera: Pseudococcidae) serta Kumbang Predator Scymnus Sp. (Mulsant) (Coleoptera: Coccinellidae) pada Ubi Kayu di Kabupaten Simare-Mare, Rut Megawati; Widaningsih, Dwi; Sunari, A. A. Ayu Agung Sri
Agrotrop : Journal on Agriculture Science Vol 13 No 3 (2023)
Publisher : Fakultas Pertanian Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/AJoAS.2023.v13.i03.p14

Abstract

Population of Mealybugs Phenacoccus manihoti Matile-Ferrero, Paracoccus marginatus Williams and Granara De Willink (Hemiptera: Pseudococcidae) and Predatory Beetle Scymnus sp. (Mulsant) (Coleoptera: Coccinellidae) on Cassava in Badung Regency. Cassava (Manihot esculenta Crantz) is a food crop commodity as an important carbohydrate source in Indonesia. This study aims to determine the population of mealybugs P. manihoti and P. marginatus and the population of predatory beetles as natural enemies of plants. cassava in Bali. The research was carried out from December 2021 to February 2022 in Badung Regency, Kuwum village, Mengwi sub-district, Bali Province. The method used in the sample is a purposive sampling with method diagonally. The results showed that the abundance of mealybugs P. marginatus and P. manihoti was quite high with a population abundance of 949.4 and 466.6. The abundance of predatory populations of scymnus sp. classified as low where 3 predators were found in the Adira 1 variety and 2.4 predators were found in the Malang variety 6. The functional relationship between the mealybug population P. marginatus, P. manihoti and the predator Scymnus sp. had a positive relationship and strong with a coefficient correlation interval was 0.9219 for P. marginatus and 0.995 for P. manihoti.
Co-Authors ADNYANA, I MADE MEGA DHEAR ANANDA SEMBIRING MAHA GUSTI AYU INTAN ARI LESTARI Gusti Ngurah Alit Susanta Wirya I GEDE AGUS ADI WIRADARMA I GEDE FEBRIANTO MAHA PUTRA I Gusti Ngurah Bagus I KETUT SUMIARTHA I MADE SUDARMA I MADE SUDARMA I MADE SUPARTHA UTAMA I NYOMAN WIJAYA I NYOMAN WIJAYA I PUTU BAWA ARIYANTA I Putu Sudiarta I WAYAN DEDI ADNYANA I Wayan Supartha KETUT AYU YULIADHI KORI’ ANGGRAINI MIFTAHUS SIROJUDDIN Ni Made Puspawati NI NENGAH DARMIATI NI NYOMAN PEBRIANI NI WAYAN SUNITI PUTU SUSY LISTYAWATI Saputra, Kelvin Indra Simare-Mare, Rut Megawati Sunari, A. A. Ayu Agung Sri WAYAN AGUS ANDI SULHAN WAYAN SUDIANTARA PUTRA