scholarly journals Ulat Bulu Orgyia sp. (Lepidoptera: Erebidae), Hama Potensial pada Tanaman Kelapa Sawit [Hairy Caterpillar, Orgyia sp. (Lepidoptera: Erebidae), Potential Pest on Oil Palm]

Buletin Palma ◽  
2017 ◽  
Vol 18 (1) ◽  
pp. 33
Author(s):  
Meldy L.A. Hosang ◽  
Jelfina C. Alouw ◽  
Fadjry Djufry
Keyword(s):  
Natural Enemies ◽  
Oil Palm ◽  
Leaf Damage ◽  
Pest Population ◽  
Palm Trees ◽  
West Papua ◽  
Foliar Damage ◽  
Potential Pest ◽  
Papua Barat

<p>The outbreaks of hairy caterpillar pests on oil palm plants that are quite severe in one of the estate oil palm plantations in West Papua occurred in 2016. Species of hairy caterpillar and the level of its damage are not known yet for certain. The purposes of this research were to identify the pest causing oil palm damage and to determine the level of palm damage, pest population and their natural enemies. Three locations were selected on the Marmare Sub District, Manokwari, West Papua. In each location, 30 plants were selected randomly in the area of the pest attack and the leaf damage was estimated. Identification result of the pest that attack young oil palm trees in PT Yongjing Investindo, West Papua was the hairy caterpillar called tusock moth, Orgyia sp. The pest caused low (5-20%) and moderate (30-40%) level of foliar damage found in 81.1% (73 plants) and 18.9% (17 plants) palm population respectively. Since palm damage potentially reduced oil palm production, regularly monitoring pest populations are needed to prevent pest outbreak.</p><p>ABSTRAK</p><p>Ledakan serangan hama ulat bulu pada tanaman kelapa sawit, cukup parah di salah satu perkebunan sawit swasta di Papua Barat terjadi pada tahun 2016. Jenis ulat bulu dan tingkat kerusakannya belum diketahui secara pasti. Penelitian ini bertujuan untuk mengidentifikasi jenis hama ulat bulu, tingkat kerusakan, populasi hama, dan musuh alaminya. Survei hama dilakukan di tiga lokasi di Distrik Marmare, Kabupaten Manokwari, Papua Barat. Pada masing-masing lokasi dipilih 30 pohon contoh secara acak pada lokasi serangan hama kemudian diestimasi tingkat kerusakan. Hasil identifikasi menunjukkan bahwa jenis ulat yang menyerang tanaman kelapa sawit muda di PT Yongjing Investindo, Papua Barat adalah ulat bulu Orgyia sp. Dari 90 tanaman contoh, kerusakan ringan (5-20%) akibat serangan Orgyia sp. dapat mencapai 81,1% (73 tanaman) dan sebanyak 18,9% (17 tanaman), termasuk tingkat serangan sedang (30-40%). Serangan ulat bulu Orgyia sp. pada perkebunan sawit masih terbatas di Distrik Marmare, tetapi berpotensi meluas ke areal pertanaman sawit lainnya. Oleh karena itu, perlu dilakukan tindakan monitoring dan pengendalian di lapangan untuk mencegah kerusakan lebih parah.</p>

scholarly journals Sexava nubila (Orthoptera: Tettigoniidae): Ledakan dan Kerusakannya pada Tanaman Kelapa Sawit / Sexava nubila (Orthoptera: Tettigoniidae): Outbreak and Its Damage on Oil palm

Buletin Palma ◽  
2017 ◽  
Vol 17 (2) ◽  
pp. 97 ◽  
Author(s):  
Jelfina C. Alouw ◽  
Meldy L.A. Hosang
Keyword(s):  
Oil Palm ◽  
Elaeis Guineensis ◽  
Cocos Nucifera ◽  
Insect Pest ◽  
Egg Parasitoid ◽  
Leaf Damage ◽  
Oecophylla Smaragdina ◽  
Damage Level ◽  
West Papua ◽  
Papua Barat

<p>Oil palm (Elaeis guineensis) is one of the major estate crops in West Papua in terms of total area and production. Thousand hectares of oil palm plantations in Manokwari, West Papua Province, have inflicted serious leaflets damage that only the midrib of the frond remains as reported by The Provincial Estate Crop Agency. The objectives of the research were to determine insect pest causing the leaf damage and its damage level on the oil palm plantations of West Papua Province.  The research was conducted in June 2016 at the oil palm estate of PT Yongjing Investindo and PT. Medco Papua Hijau Selaras, West Papua.  Field observation and identification in the laboratory showed that the causative agent is Sexava nubila (Orthoptera: Tettigoniidae).  S. nubila known as the main pest attacking coconut palm (Cocos nucifera) in several locations in Eastern Indonesia, has invaded oil  palms and causing severe damage, 20 to 100% of leaflet damage. Natural enemies found in the Sexava-attacking areas including crow, ant (Oecophylla smaragdina), praying mantids (Orthopthera: Mantidae), and egg parasitoid (Leefmansia bicolor).This is the first report on the invasion of S. nubila to oil palm plantation. Serious attention is urgently needed to prevent further economic yield losses due to the pest on oil palm plantations in West Papua Province. </p><p><strong>ABSTRAK</strong></p><p>Kelapa sawit (Elaeis guineensis) merupakan salah satu komoditas perkebunan unggulan di Provinsi Papua Barat berdasarkan luas areal dan produksinya. Ribuan hektar tanaman kelapa sawit yang berumur sekitar 25 tahun dilaporkan oleh Dinas Perkebunan Provinsi Papua Barat mengalami kerusakan berat, yaitu daunnya tinggal lidi-lidi.  Diduga kerusakan tersebut akibat serangan hama. Penelitian ini bertujuan untuk mengidentifikasi jenis hama dan tingkat kerusakannya pada pertanaman kelapa sawit di Provinsi Papua Barat.  Penelitian dilakukan pada Bulan Juni 2016 di perkebunan kelapa sawit milik PT. Yongjing Investindo dan PT. Medco Papua Hijau Selaras. Kegiatan survei dilakukan untuk mendapatkan sampel serangga hama dan mengestimasi tingkat kerusakannya, serta mengoleksi jenis musuh alami yang berasosiasi dengan target hama, dilanjutkan dengan kegiatan laboratorium untuk mengkonfirmasi hasil identifikasi hama dan jenis musuh alaminya. Hasil survei menunjukkan bahwa  penyebab kerusakan pada kelapa sawit di PT Yongjing Investindo dan PT. Medco Papua Hijau Selaras, Papua Barat adalah belalang Sexava nubila Stal. (Orthoptera: Tettigoniidae).  S. nubila merupakan hama kelapa (Cocos nucifera) yang sudah lama ada di beberapa daerah di Papua Barat.  S. nubila merusak  daun kelapa sawit dengan tingkat kerusakan mencapai  20-100% sehingga kerusakannya dikategorikan sangat merusak. Musuh-musuh alami S. nubila yang banyak ditemukan di lapangan adalah burung gagak, semut rangrang (Oecophylla smaragdina), belalang sembah (Orthopthera: Mantidae), dan parasitoid telur (Leefmansia bicolor).  Hasil penelitian ini merupakan  laporan pertama tentang serangan hama S. nubila pada tanaman kelapa sawit.  Perlu upaya  serius dan tindakan pengendalian yang segera  untuk menghindari kerugian ekonomi yang besar pada pertanaman sawit di Papua Barat.</p><p> </p><br />Kelapa sawit (Elaeis guineensis) merupakan salah satu komoditas perkebunan unggulan di Provinsi Papua Barat berdasarkan luas areal dan produksinya. Ribuan hektar tanaman kelapa sawit yang berumur sekitar 25 tahun dilaporkan oleh Dinas Perkebunan Provinsi Papua Barat mengalami kerusakan berat, yaitu daunnya tinggal lidi-lidi.  Diduga kerusakan tersebut akibat serangan hama. Penelitian ini bertujuan untuk mengidentifikasi jenis hama dan tingkat kerusakannya pada pertanaman kelapa sawit di Provinsi Papua Barat.  Penelitian dilakukan pada Bulan Juni 2016 di perkebunan kelapa sawit milik PT. Yongjing Investindo dan PT. Medco Papua Hijau Selaras. Kegiatan survei dilakukan untuk mendapatkan sampel serangga hama dan mengestimasi tingkat kerusakannya, serta mengoleksi jenis musuh alami yang berasosiasi dengan target hama, dilanjutkan dengan kegiatan laboratorium untuk mengkonfirmasi hasil identifikasi hama dan jenis musuh alaminya. Hasil survei menunjukkan bahwa  penyebab kerusakan pada kelapa sawit di PT Yongjing Investindo dan PT. Medco Papua Hijau Selaras, Papua Barat adalah belalang Sexava nubila Stal. (Orthoptera: Tettigoniidae).  S. nubila merupakan hama kelapa (Cocos nucifera) yang sudah lama ada di beberapa daerah di Papua Barat.  S. nubila merusak  daun kelapa sawit dengan tingkat kerusakan mencapai  20-100% sehingga kerusakannya dikategorikan sangat merusak. Musuh-musuh alami S. nubila yang banyak ditemukan di lapangan adalah burung gagak, semut rangrang (Oecophylla smaragdina), belalang sembah (Orthopthera: Mantidae), dan parasitoid telur (Leefmansia bicolor).  Hasil penelitian ini merupakan  laporan pertama tentang serangan hama S. nubila pada tanaman kelapa sawit.  Perlu upaya  serius dan tindakan pengendalian yang segera  untuk menghindari kerugian ekonomi yang besar pada pertanaman sawit di Papua Barat.

scholarly journals Keragaman Fenotipe dan Genetik Kumbang Brontispa longissima (Coleoptera: Chrysomelidae) pada Tanaman Kelapa; The Genetic and Phenotypic Diversities of Brontispa longissima Beetle (Coleoptera: Chrysomelidae) on Coconut Palms

Buletin Palma ◽  
2018 ◽  
Vol 18 (2) ◽  
pp. 83
Author(s):  
Jelfina C. Alouw ◽  
Ismail Maskromo ◽  
Fadjry Djufry
Keyword(s):  
Rapd Markers ◽  
Rapd Marker ◽  
Leaf Damage ◽  
Yield Losses ◽  
North Sulawesi ◽  
South Sulawesi ◽  
Two Samples ◽  
West Papua ◽  
Papua Barat ◽  
Different Color

<p align="center"><strong>ABSTRAK</strong></p><p><em>Brontispa longissima </em>merupakan salah satu hama utama kelapa yang dapat menyebabkan kerusakan daun dan kehilangan hasil kelapa secara ekonomi. Terdapat variasi warna dan pola pewarnaan <em>elytra</em> <em>B. longissima</em> yang tersebar di Indonesia. Tujuan penelitian adalah untuk menganalisis keragaman fenotipe dan genetik hama <em>Brontispa longissima</em> yang berasal dari beberapa daerah dengan menggunakan marka RAPD. Analisis keragaman genetik berdasarkan marka RAPD dilakukan terhadap hama <em>B. longissima</em> yang dikoleksi dari Sulawesi Utara (Sulut), Sulawesi Selatan (Sulsel), Ambon/Seram, dan Papua Barat. Penelitian dilaksanakan di Laboratorium Terpadu Hama dan Penyakit Balai Penelitian Tanaman Palma (Balit Palma), dan Laboratorium Balai Besar Penelitian dan Pengembangan Bioteknologi dan Sumberdaya Genetik Pertanian (BB Biogen), dari Bulan Maret sampai dengan November 2016. Berdasarkan analisis RAPD menggunakan 3 primer pada enam sampel <em>B. longissima </em>menunjukkan sampel mengelompok menjadi dua kelompok besar yaitu kelompok I terdiri atas sampel Papua Barat dan Sulsel 2 dan kelompok II  terdiri dari sampel  Ambon/Seram, Sulut 1, Sulut 2 dan Sulsel 1  dengan tingkat kemiripan sekitar 50%. Pada kelompok I, sampel Papua Barat dan Sulsel 2 mempunyai kemiripan sekitar 75%. Kemiripan tertinggi      (&gt; 80 %) tampak antara sampel Sulut 1 dan Sulut 2 yang memiliki warna dan pola warna <em>elytra</em> yang berbeda. Primer OPA 01 dapat digunakan untuk membedakan antar sampel atau keragaman populasi sehingga dapat diaplikasikan sebagai alat deteksi yang cepat dan akurat.   </p><p align="center"><strong> </strong></p><p align="center"><strong>ABSTRACT</strong></p><em>Brontispa longissima </em>is one of the main pests of coconut causing leaf damage and yield losses. Variation of color and pattern of the elytra was found among population of <em>B. longissima</em> distributed in Indonesia. The objective of the study was to analyze the phenotypic and genetic diversities of <em>Brontispa longissima</em> pests from several regions using RAPD markers. RAPD marker based diversities analysis was carried out to evaluate genetic and phenotipic relationships among population of <em>B. longissima</em> collected from North Sulawesi (Sulut), South Sulawesi (Sulsel), Ambon/Seram, and West Papua. Laboratory expriments were carried out at the Integrated Pest and Disease Laboratory of The Indonesian Palm Crops Research Institute (IPCRI) and the Laboratory of The Indonesian Center For Agricultural Biotechnology And Genetic Resources Research and Development (ICABOG RAD) from March to November 2016.  Three of the twenty primers selected, have grouped the samples into two distinct clusters.  Cluster analysis indicated 75% similarities between West Papua (P) populations and collections from South Sulawesi 2, and 50% similarities among samples from Ambon/Seram, North Sulawesi 1 and 2, and South Sulawesi 1. The highest similarity of more than 80% was found on two samples from North Sulawesi having different color and pattern of elytra. Primer OPA-01 showed highest polymorphism percentage.

PENGARUH DISIPLIN KERJA DAN KEMAMPUAN KERJA TERHADAP KINERJA PNS DINSOS PAPUA BARAT

2020 ◽  
Vol 3 (1) ◽  
pp. 562
Author(s):  
Sylvia Margareth Sabarofek ◽  
Paulus Habel Sawor ◽  
Makarius Bajari
Keyword(s):  
Social Service ◽  
Work Ability ◽  
Employee Performance ◽  
Research Result ◽  
Sampling Technique ◽  
The West ◽  
West Papua ◽  
Papua Barat ◽  
Work Coordination ◽  
Office Employees

The purpose of this study was to study the effect of work discipline variable and simultaneous work ability and competence at the West Papua Province Social Service Office. This research is a quantitative study. The sampling method uses Non Probability Sampling and the sampling technique uses Saturated Sampling. The result of this study indicate that the variable work discipline is not significant on employee performance, and subsequent research result indicate that work ability variables partially have a siginificant effect on employee performance. Also showed a variable work discipline and work ability significantly to the performance of employess in the West Papua Province Social Service Office. Improving the performance of West papua Provincial Social Service Office employees must provide work coordination and work capabilities together to improve employee performance.

Growing status observation for oil palm trees using Unmanned Aerial Vehicle (UAV) images

2021 ◽  
Vol 173 ◽  
pp. 95-121
Author(s):  
Juepeng Zheng ◽  
Haohuan Fu ◽  
Weijia Li ◽  
Wenzhao Wu ◽  
Le Yu ◽  
...  
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Oil Palm ◽  
Palm Trees ◽  
Aerial Vehicle ◽  
Uav Images

scholarly journals Intercropping Rosemary (Rosmarinus officinalis) with Sweet Pepper (Capsicum annum) Reduces Major Pest Population Densities without Impacting Natural Enemy Populations

Insects ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 74
Author(s):  
Xiao-wei Li ◽  
Xin-xin Lu ◽  
Zhi-jun Zhang ◽  
Jun Huang ◽  
Jin-ming Zhang ◽  
...  
Keyword(s):  
Integrated Pest Management ◽  
Pest Management ◽  
Pest Control ◽  
Natural Enemies ◽  
Natural Enemy ◽  
Sweet Pepper ◽  
Population Densities ◽  
Pest Population ◽  
Major Pest ◽  
Population Suppression

Intercropping of aromatic plants provides an environmentally benign route to reducing pest damage in agroecosystems. However, the effect of intercropping on natural enemies, another element which may be vital to the success of an integrated pest management approach, varies in different intercropping systems. Rosemary, Rosmarinus officinalis L. (Lamiaceae), has been reported to be repellent to many insect species. In this study, the impact of sweet pepper/rosemary intercropping on pest population suppression was evaluated under greenhouse conditions and the effect of rosemary intercropping on natural enemy population dynamics was investigated. The results showed that intercropping rosemary with sweet pepper significantly reduced the population densities of three major pest species on sweet pepper, Frankliniella intonsa, Myzus persicae, and Bemisia tabaci, but did not affect the population densities of their natural enemies, the predatory bug, Orius sauteri, or parasitoid, Encarsia formosa. Significant pest population suppression with no adverse effect on released natural enemy populations in the sweet pepper/rosemary intercropping system suggests this could be an approach for integrated pest management of greenhouse-cultivated sweet pepper. Our results highlight the potential of the integration of alternative pest control strategies to optimize sustainable pest control.

Seasonal Incidence of Pulse Aphid (Aphis craccivora Koch.) and its Natural Enemies on Field Pea (Pisum sativum L.) in Relation to Some Abiotic Factors in Alluvial Zone of West Bengal

2021 ◽  
Author(s):  
S. Pal ◽  
S. Samanta ◽  
A. Banerjee
Keyword(s):  
Relative Humidity ◽  
Pisum Sativum ◽  
Natural Enemies ◽  
West Bengal ◽  
Insect Pests ◽  
Field Pea ◽  
Pest Population ◽  
Pisum Sativum L ◽  
Aphis Craccivora Koch ◽  
Weather Parameters

Background: Field pea, Pisum sativum L. is an important winter-season pulse crop. It is subjected to damage by both field and storage insect pests and approximately 10-15 per cent reduction in yield was reported due to the infestation of different insect pests. Among these, pulse aphid (Aphis craccivora Koch.) affects plant physiology directly by removal of nutrients or indirectly by dispersal of various viral diseases. The present investigation has been aimed to study the seasonal fluctuations of aphids and their natural enemies as well as their correlation. Another objective was to know the effect of various weather parameters on pulse aphids and their natural enemies which ultimately would be helpful to develop a forewarning model.Methods: The field experiment was conducted at the A-B Block Farm of Bidhan Chandra Krishi Viswavidyalaya, Nadia, West Bengal using two varieties of field pea (KPMR 935 and IFPD 122) during rabi seasons of two consecutive years of 2017-18 and 2018-19 following a Randomized Block Design with three replications. After recording the total population of both pests (nymphs and adults) and their natural enemies across the season, the mean population was worked out and used for correlation and regression studies along with the weather parameters. Result: Maximum aphid population was noticed during the peak pod formation stage of the crop irrespective of the varieties. The pest population was very strongly correlated with the incidence of coccinellid and ant population in both test varieties. Among the weather parameters, both maximum and minimum temperature and sunshine hour showed a positive correlation with the pest population and their natural enemies but relative humidity and rainfall showed a negative correlation. Regression studies indicated that temperature and relative humidity were the most influencing factors over the incidence of aphid in both the seasons.

RENOVASI KANDANG KELOMPOK DAN HANDLING SAPI KE KANDANG KELOMPOK DI PILOT PROJECT KAMPUNG JENDERAU DISTRIK KEBAR TIMUR

2021 ◽  
Vol 2 (2) ◽  
pp. 64
Author(s):  
John Arnold Palulungan ◽  
Daniel Yohanes Seseray ◽  
Iriani Sumpe ◽  
Abdul Rahman Ollong ◽  
Alnita Baaka ◽  
...  
Keyword(s):  
Animal Husbandry ◽  
Pilot Project ◽  
West Papua ◽  
Papua Barat ◽  
The Village

ABSTRACT The biogas program implemented in Jandurau Village has an impact on the community. The community began to renovate the old cattle sheds in the village of Jandurau and herded wild cattle from the forest to be kept in said sheds. The construction of the sheds involved the Jandurau community by utilizing equipment and materials owned by the community along with assistance from Bank Indonesia (BI) West Papua. A supervising team from the Faculty of Animal Husbandry, University of Papua assisted to ensure the activity went smoothly. Keywords: Cage, Biogas, Jandurau village, Cattle   ABSTRAK Program biogas yang dilaksanakan di Kampung Jandurau memberi dampak kepada masyarakat. Masyarakat mulai melakukan renovasi kandang lama yang ada di kampung Jandurau, selain itu masyarakat mulai mengumpulkan ternak-ternak sapi yang awalnya diliarkan di hutan untuk di kandangkan. Pembangunan kandang melibatkan masyarakat Jandurau dengan memanfaatkan peralatan dan bahan yang dimiliki oleh masyarakat dan juga bantuan dari Bank Indonesia (BI) Papua Barat. Tim pendamping dari Fakultas Peternakan Universitas Papua mendampingi hingga Kegiatan ini berjalan dengan baik. Kata kunci: Kandang, Biogas, Kampung Jandurau, Ternak sapi

PENERAPAN ANALISIS GEROMBOL DAN BIPLOT (STUDI KASUS: HASIL PERTANIAN DAERAH TERTINGGAL DI PROVINSI PAPUA BARAT)

2018 ◽  
Vol 14 (1) ◽  
pp. 45-50
Author(s):  
Indah Ratih Anggriyani ◽  
Dariani Matualage ◽  
Esther Ria Matulessy
Keyword(s):  
Relative Position ◽  
Fruits And Vegetables ◽  
Agricultural Products ◽  
Agricultural Product ◽  
Regional Characteristics ◽  
Biplot Analysis ◽  
West Papua ◽  
Agricultural Potential ◽  
Papua Barat ◽  
Different Characteristics

One of the potential of the seven districts underdeveloped areas in West Papua Province is agriculture. In order to develop agricultural potential, an overview of agricultural products is needed including the similarity of regional characteristics and the relative position of the region. The similarity of regional characteristics to agricultural product can be known by cluster analysis. The relative posistion of the area with agricultural  results is known by biplot analysis. Bintuni Bay Regency, South Sorong Regency, Tambrauw Regency and Maybrat Regency have the same characteristics in producing agriculture while Teluk Wondama Regency, Sorong Regency and Raja Ampat Regency have different characteristics. The relative position of agricultural products with the regency is Sorong Regency producing the highest number of food crops while the largest producer of horticulture fruits and vegetables are Teluk Wondama Regency and Raja Ampat Regency.

scholarly journals Effects of herbivory and its timing on reproductive success of a tropical deciduous tree

2020 ◽  
Vol 126 (5) ◽  
pp. 957-969
Author(s):  
Enya N Quiroz-Pacheco ◽  
Francisco Mora ◽  
Karina Boege ◽  
César A Domínguez ◽  
Ek del-Val
Keyword(s):  
Reproductive Success ◽  
Structural Equation ◽  
Structural Equation Models ◽  
Pollen Grains ◽  
Leaf Damage ◽  
Deciduous Tree ◽  
Herbivore Damage ◽  
Male And Female ◽  
Foliar Damage ◽  
The Impact

Abstract Background and Aims The implications of herbivory for plant reproduction have been widely studied; however, the relationship of defoliation and reproductive success is not linear, as there are many interacting factors that may influence reproductive responses to herbivore damage. In this study we aimed to disentangle how the timing of foliar damage impacts both male and female components of fitness, and to assess when it has greater impacts on plant reproductive success. Methods We measured herbivore damage and its effects on floral production, male and female floral attributes as well as fruit yield in three different phenological phases of Casearia nitida (Salicaceae) over the course of two consecutive years. Then we tested two models of multiple causal links among herbivory and reproductive success using piecewise structural equation models. Key Results The effects of leaf damage differed between reproductive seasons and between male and female components of fitness. Moreover, the impact of herbivory extended beyond the year when it was exerted. The previous season’s cumulated foliar damage had the largest impact on reproductive characters, in particular a negative effect on the numbers of inflorescences, flowers and pollen grains, indirectly affecting the numbers of infructescences and fruits, and a positive one on the amount of foliar damage during flowering. Conclusions For perennial and proleptic species, the dynamics of resource acquisition and allocation patterns for reproduction promote and extend the effects of herbivore damage to longer periods than a single reproductive event and growing season, through the interactions among different components of female and male fitness.

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