I Wayan Supartha
Department Of Agroecotechnology, Faculty Of Agriculture, Udayana University, Indonesia

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Insidensi Serangan dan Perkembangan Populasi Hama Invasif, Spodoptera frugiperda (J. E Smith) (Lepidoptera: Noctuidae) pada Tanaman Jagung dan Sorgum di Bali CRISTINE LAURINE SIMANJUNTAK; I KETUT SUMIARTHA; KETUT AYU YULIADHI; 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.p01

Abstract

Incidence of Attacks and Population Development of Invasive Pests, Spodoptera frugiperda (J.E Smith) (Lepidoptera: Noctuidae) on Corn and Sorghum Crops in Bali. Spodoptera frugiperda is known as an invasive pest which now become important pest on corn crops in Indonesia and Bali in particular, but in this study the Spodoptera frugiperda was also found to attack sorghum. This study used purposive survey method and on land that had been fixed. Plant sampling was carried out in all regencies of Bali Province by means of diagonal sampling. The size of unit sample was 2 x 2m and the number of plants observed was 20 plants. The results of this study showed that the incidence of S. frugiperda attack has been observed on plant beds in all districts/cities in Bali which is indicated by symptoms of attack and abundance of S. frugiperda population on corn and sorghum in the field. The highest abundance of S. frugiperda larvae population was in sweet corn in Klungkung Regency as much as 38.67 heads, and the lowest was in sorghum numbu in Tabanan Regency as many as 27.00 individuals per observation plot. Population development of egg groups was found in plants aged 1 (MST) while larvae of S. frugiperda showed the same pattern in sweet corn, sticky rice and pipil plants and the peak of larval population occurred in plants aged 4 WATS respectively. While the peak population of larvae in sorghum plants occurred at 5 WAP and imago populations in sweet corn were found in sweet corn plants at 2 WAP and glutinous corn at 4 WAP. The highest percentage of S. frugiperda attack was on sweet corn with an average attack of 43% per observation plot and the lowest on sorghum numbu with an average of 25% per observation plot.
Tanggap Parasitoid Braconidae (Hymenoptera) Terhadap Hama Invasif Liriomyza trifolii (Burgess) (Diptera: Agromyzidae) pada Tanaman Sayuran dan Hias di Bali TIA GUNAWAN SARI; A. A. AYU AGUNG SRI SUNARI; 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.p11

Abstract

Response of Braconid Parasitoid Against Invasive Pest, Liriomyza trifolii (Burgess) (Diptera: Agromyzidae) on Vegetable and Ornamental Crops in Bali. Research on the respopnse of Braconid parasitoids to the invasive pest, Liriomyza trifolii that attacks ornamental plants and vegetables in Bali, was carried out from September 2020 to March 2021. This study aimed to determine the type and abundance of parasitoid populations that responded to Liriomyza trifolii on host plants in the field. In addition, this study also aims to evaluate the level of parasitization of each parasitoid against L. trifolii. This study used a purposive sampling method by taking leaf samples that showed active symptoms of Liriomyza larvae in the leaves of plants. The research focused on vegetables and ornamental plants cultivated in lowlands <500 meters above sea level (masl), mediumlands 500-1000 meters above sea level and highlands> 1000 meters above sea level. The results showed that there were two species of Braconid parasitoids that responded to Liriomyza trifolii in the field, namely Opius dissitus and Opius cromatomiyae. The relative abundance and degree of parasitization of the two parasitoids showed variation between host plant species and altitude. The relative abundance of O. dissituse was high in chrysanthemum (10.81%) at an altitude of >1000 masl and low in long beans (0.53%) at an altitude of <500 masl. The highest relative abundance of O. cromatomiyae was in marigold flowers (51.18%) at an altitude of <500 masl and the lowest was in chrysanthemum (44.83%) at an altitude of > 1000 masl. The highest level of parasitization of O. dissitus was found in pakcoy plants (50.00%) at an altitude of >1000 masl and the lowest was in mustard plants (6.06%) at an altitude of <500 masl. The highest level of parasitization of O. cromatomiyae was in celery (33.33%) at an altitude <500 masl and the lowest was in tomato plants (25.00%) at an altitude> 1000 masl. Both species of Braconid parasitoids have high potential as biological control agents for L. trifolii as indicated by their relative abundance and high levels of parasitization against these invasive pests.
Kemampuan Adaptasi Liriomyza trifolii (Burgess) (Diptera: Agromyzidae) terhadap Berbagai Famili Tanaman Inang pada Musim Kemarau dan Hujan di Bali AGNESIA KURNIAWATI; I WAYAN SUPARTHA; I NYOMAN WIJAYA
Agrotrop : Journal on Agriculture Science Vol 13 No 1 (2023)
Publisher : Fakultas Pertanian Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/AJoAS.2023.v13.i01.p08

Abstract

The adaptability of Liriomyza trifolii (Burgess) (Diptera: Agromyzidae) to various host families in the dry and rainy seasons in Bali. Leafminer fly Liriomyza trifolii (Burgess) (Diptera: Agromyzidae) is a newly introduced invasive spec thatthatd attacks various types of host plants in Bali. This study aims to determine the adaptability of L. trifolii (Diptera: Agromyzidae) to various host plants during the dry and rainy seasons in Bali. This research was conducted in all regencies/cities in Bali in September 2020-March 2021 using a survey method starting from the lowlands <500 masl, medium plains 500-1000 masl, and highlands > 1000 masl. Sampling was carried out by purposive sampling by taking 100-150 plant leaves showing symptoms of leaf damage by L. trifolii at the study site. The results showed that L. trifolii was able to adapt to damage 10 types of host plants from the Asteraceae family, namely Gumitir flowers, Chrysanthemums and Zinia flowers, Fabaceae family, namely long beans, squat beans, and green beans, Brassicaceae family, namely Pak Choyy and mustard greens, Solanaceae family, namely tomatoes. and the Cucurbitaceae family, namely cucumbers in two growing seasons from the lowlands to the highlands. Gumitir and long bean flowers are the host plants that get the highest attack frequency from L. trifolii during the dry and rainy seasons in Bali, both in the lowlands and in the middle. Gumitir and long bean flowers were indicated as the most selected host plants by L. trifolii in the field. The novel results of this study indicate that L. trifolii is a new invasive pest in Bali that has broad adaptability to host plant families during the rainy and dry seasons in low, medium, and high altitudes.
Evaluation of the Community Structure Leafminer Fly, Liriomyza spp. (Diptera: Agromyzidae) and Their Parasitoids on Various Host Plant Families in Bali Province I Wayan Supartha; I Wayan Susila; Aunu Rauf; B. Merle Shepard; I Wayan Eka Karya Utama; I Wayan Sandikayasa; I Kadek Wisma Yudha; Putu Angga Wiradana
HAYATI Journal of Biosciences Vol. 30 No. 3 (2023): May 2023
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.30.3.432-444

Abstract

Leaf miners, Liriomyza spp., have developed as a severe pest in recent years, reducing the production of several ornamental and crops in Indonesia. As a result, monitoring and control mechanisms have been proposed. This research aimed to investigate community structure and identify Liriomyza spp., which impacts crops and natural parasitoids in Bali Province. Leaf samples of vegetables, ornamental plants, and related species were collected in all regencies/cities of Bali Province in 2019 and 2020 and preserved in the laboratory for observation and counting of leaf miners and related parasitoids. The findings revealed that four Liriomyza spp. were detected in host plants, namely Liriomyza sativae Blanchard (Diptera: Agromyzidae), Liriomyza huidobrensis Blanchard (Diptera: Agromyzidae), Liriomyza chinensis Kato (Diptera: Agromyzidae), and Liriomyza trifolii Burgess (Diptera: Agromyzidae). Asteraceae species were the most common host plants attacked by leaf miners in the field. The same occurrence was discovered at both heights (high and lowlands). The dry season is the most crucial component in the abundance of Liriomyza spp. In addition, parasitoids of the type Opius cromatomiyae Belokobylskij and Wharton (Hymenoptera: Braconidae) and Hemiptarsenun varicornis Girault (Hymenoptera: Eulophidae) were identified in abundance in Asteraceae plants. Similarly, the parasitization rate of the two parasitoids was found to be high in plants of the Asteraceae and Brassicae families. This approach highlights the decision-making process for controlling Liriomyza spp. on diverse host plant families by developing ecologically beneficial and sustainable parasitoids.