1,720,981 research outputs found
Fig. 3 in Morphometric Comparison of the Oil Palm Pollinator Elaeidobius kamerunicus Faust (Coleoptera: Curculionidae) from Malaysia, Indonesia, and Liberia
No full textFig. 3. Plot of all Elaeidobius kamerunicus specimens against PC 1 and PC 2 based on a set of 15 morphometric characters for both sexes.Published as part of Abd Latip, Nurul Fatihah, Ghani, Idris Abd, Hazmi, Izfa Riza, Zainal Abidin, Cik Mohd Rizuan, Sartiami, Dewi, Yacob, Shahrakbah & Nasir, Dzulhelmi Muhammad, 2019, Morphometric Comparison of the Oil Palm Pollinator Elaeidobius kamerunicus Faust (Coleoptera: Curculionidae) from Malaysia, Indonesia, and Liberia, pp. 746-756 in The Coleopterists Bulletin 73 (3) on page 751, DOI: 10.1649/0010-065X-73.3.746, http://zenodo.org/record/540278
Mealybugs (Hemiptera: Pseudococcidae) on Chrysanthemum And Their Management Efforts at PT. Natalia Nursery, Bogor West Java
No full textKrisan merupakan tanaman hias bunga potong dan menjadi komoditas
ekspor utama florikultura di Indonesia. Usaha dalam budidaya tidak terlepas dari
organisme penganggu tanaman, salah satunya kutu putih. Penelitian ini bertujuan
mengidentifikasi spesies kutu putih pada krisan, menentukan intensitas serangan
dan mengamati gejala kerusakan Phenacoccus solenopsis pada krisan serta upaya
pengendaliannya. Identifikasi dilakukan dengan mengoleksi kutu putih yang ada
pada tanaman krisan kemudian dibuat preparat mikroskop. Pengamatan intensitas
serangan dilakukan pada tiga petak krisan, dan gejala kerusakan dilakukan dengan
menginfestasi Ph. solenopsis. Upaya pengendalian dilakukan dengan menguji
keefektifan minyak mimba (Azadirachta indica) terhadap Ph. solenopsis, yaitu
dengan aplikasi minyak mimba tunggal, sabun sebelum mimba, campuran sabun
dan mimba serta kontrol. Metode pengujiannya yaitu larutan disemprot pada
tanaman yang diinfestasi kutu putih. Kematian Ph. solenopsis diamati 24, 48, 72,
96 JSP. Hasil identifikasi terdapat empat spesies kutu putih, yaitu: Ferrisia virgata,
Ph. solenopsis, Pseudococcus jackbeardsleyi, dan Planacoccus minor yang
menjadi hama pada krisan. Spesies F. virgata dan Pl. minor merupakan catatan baru
pada tanaman krisan. Intensitas serangan Ph. solenopsis tertinggi yaitu 8.72%
dengan populasi 73.5 kutu putih per petak. Kerusakan Ph. solenopsis pada fase
vegetatif menyebabkan malformasi di bagian pucuk daun sehingga ukurannya
menyusut, keriting, penebalan daun, pembengkokan batang serta pengurangan
ukuran secara keseluruhan. Gejala fase generatif menyebabkan daun pelindung
seperti terpelintir, bakal bunga tidak berkembang dan pembengkokan tangkai
bunga. Aplikasi sabun dilanjut dengan mimba menunjukkan paling efektif terhadap
Ph. solenopsis dengan mortalitas sebesar 100% pada 96 JSP.Chrysanthemum is the most exported ornamental cut flower in Indonesia.
Its cultivation cannot be separated from pests attacks, especially mealybugs. This
study aims to identify mealybugs species on chrysanthemum, to determine the
intensity attack level, damage symptom of Phenacoccus solenopsis and its control
efforts. Mealybug identification was made by collecting mealybugs and preparing
on slide. The intensity and population development of mealybugs were observed on
three plots. The damage symptoms caused by mealybugs, a certain number of Ph.
solenopsis were infested to the plants and observed. Control efforts were carried
out by testing the effectiveness of Neem (Azadirachta indica) against Ph.
solenopsis, the plant was treated with single neem oil, combined with soap, applied
after soap and control. The method is a solution sprayed on chrysantemum that
mealybugs invest in. The death Ph. solenopsis was observed at 24, 48, 72, 96 HAT.
The identification result shows that there are four mealybugs species, i.e: Ferrisia
virgata, Ph. solenopsis, Planacoccus minor, and Pseudococcus jackbeardsleyi as
pest on chrysanthemum. The species of F. virgata and Pl. minor are new mealybugs
pests record to chrysanthemum. The highest intensity of Ph. solenopsis is recorded
as many as 8.72 % or 73.5 mealybugs per plots. Damage due to mealybugs in the
vegetative phase causes malformation in the shoots leaves reported as reduction of
leaf size, wavy leaves, curled, thickened, twisted leaves, incurvation of stem, and
reduction of overall plant size. Further damage on generative phase showed the
incurvation of bud and flower stalk. The most effective treatment against Ph.
solenopsis with a mortality of 100% at 96 hour after treatment on soap spraying
continued by neem
Parasitization Levels and Species of Egg Parasitoid on Yellow Rice Stem Borer (Scirpophaga incertulas) at Paddy Field, Karawang District
No full textProduksi padi di Indonesia masih mengalami penurunan signifikan yang
disebabkan oleh organisme pengganggu tanaman (OPT), salah satunya adalah
penggerek batang padi kuning (PBPK), Scirpophaga incertulas. Pengendalian
hama tersebut yang umum dilakukan oleh petani adalah penggunaan insektisida.
Aplikasi insektisida apabila dilakukan dengan tidak bijaksana akan berdampak
negatif. Oleh karena itu, perlu dilakukan pengendalian hama yang ramah
lingkungan sesuai konsep pengendalian hama terpadu (PHT) seperti aplikasi
feromon sintetik. Penelitian ini bertujuan mengetahui tingkat parasitasi dan spesies
parasitoid telur S. incertulas pada pertanaman padi yang mendapat perlakuan
feromon sintetik (Z11-Hexadecenal 33%). Penelitian ini dilakukan di pertanaman
padi milik petani di Desa Sukaraja, Kecamatan Rawamerta, dan Desa
Sindangmukti, Kecamatan Kutawaluya, Kabupaten Karawang, Jawa Barat mulai
dari Februari sampai Juni 2020. Penelitian dilakukan pada lahan 80 ha yang dibagi
menjadi beberapa petak lahan. Percobaan dilakukan menggunakan rancangan acak
kelompok (RAK) dengan 4 perlakuan dan 5 ulangan. Perlakuan yang digunakan
yaitu perlakuan kontrol (pertanaman padi tanpa feromon) dan perlakuan feromon
dengan dosis 10 dispenser/ha, 20 dispenser/ha, dan 30 dispenser/ha. Pengambilan
kelompok telur dilakukan setiap 2 minggu sebanyak 4 kali. Peubah yang diamati
yaitu kemunculan larva PBPK dan imago parasitoid, serta tingkat parasitisasinya.
Hasil penelitian ini menunjukkan bahwa penggunaan feromon sintetik dapat
memengaruhi tingkat parasitasi kelompok telur pada pengamatan 10 MST dan
tingkat parasitasi butir telur pada pengamatan 6 MST, tetapi tidak memengaruhi
terhadap jumlah larva PBPK yang menetas, imago parasitoid yang muncul, dan
spesies parasitoid yang ditemukan.The rice production in Indonesia have significant declined due to plant pests
and diseases, one of them is yellow rice stem borer (PBPK) Scirpophaga incertulas.
Insecticide applications have been commonly used by farmers for controlling this
pest. Unwise application of insecticides will have a negative impact. Therefore,
integrated pest management (IPM) needs to be carrierd out and one of strategy is
synthetic pheromone application. This research aims to determine the type of egg
parasitoids and its parasitization level of S. incertulas in paddy field applied by
synthetic pheromones (Z11-Hexadecenal 33%). This research was carried out in
farmers' rice fields at Sukaraja Village, Rawamerta District, and Sindangmukti
Village, Kutawaluya District, Karawang Regency, West Java from February to June
2020. The research was carried out on 80 Ha of land which was divided into several
plots of land. The experiment was conducted using a randomized group (RBD) with
4 treatments and 5 replications. The treatments used were control treatment (rice
cultivation without using pheromone) and treatment of rice planting with 10
dispenser/ha, 20 dispenser/ha, and 30 dispenser/ha. Eggs were sampled biweekly
for 4 times with variables were observed of the appearance of PBPK larvae,
parasitoid imago, and parasitization levels. The results of this study indicated that
the use of synthetic pheromones affected the parasitization levels of egg group at
10 MST and parasitization levels of egg at 6 MST, but does not affected the number
of hatched PBPK larvae, emerge parasitoids adults, and parasitoid species found
Pengaruh Deterjen dalam Peluruhan Lilin dan Mortalitas Kutu Putih, Paracoccus marginatus (Hemiptera: Pseudococcidae)
No full textPapaya mealybug, Paracoccus marginatus (Hemiptera: Pseudococcidae) is one of important pests that can decrease papaya production. An effective control effort to reduce the population of this insect pest is by using insecticides but the excessive and improper uses cause undesirable effect to human and environments. Moreover, detergents can be also used as control agents to this insect pest. The objective of this research was to study the role of detergent in controling the papaya mealybug. Detergents used in this experiment were powder detergent (a.i: sodium dodecyl benzene sulfonate), liquid detergent (a.i: sodium alkyl benzene sulfonate) and cream detergent (a.i: sodium alkylbenzene sulfonate). Each test detergent was sprayed to third instar nymph of P. marginatus with the detergent concentrations of 0.05%, 0.1%, 0.2% and control. Observation of decreasing wax layer was carried out at 1, 2, 3, 4 and 5 days after treatment. Two syntetic insecticides were used in this experiment; profenofos and deltamethrin. The same method was used in testing the syntetic insecticides, both single and the combination treatment of insecticide and liquid detergent. Insect mortality was assessed at 1, 2, 3, 4 and 5 days after treatment. Liquid detergent treatment showed higher activity in causing shed of wax layer than powder and cream detergents with the percentage for each treatment of 64%, 58%, and 48%, respectively.The average of insect mortalities on the treatments of combination of deltamethrin and detergent were higher than the treatment of combination of profenofos and detergents
Identifikasi Organisme Pengganggu Tanaman Gandum (Triticum aestivum L.) di Kuningan dan Bogor, Provinsi Jawa Barat
No full textThe development of wheat crops in Indonesia has been struggling to fulfill domestic needs which increase over time. Information about plant pest organisms which attack introduced (SO9) and IPB bred strain (Kasifbey) wheat is one of the main constraints to maintain production capacity of the wheat crops. Therefore, this research needs to be performed. The aim of this research is to find out information about the plant pest organisms on the SO9 and Kasifbey wheat. Observations on the crops have been conducted at the two places cultivation: in Leuwimalang village, Cisarua Subdistrict, Bogor District (705 m above sea surface) and in Cilimus village, Cilimus Subdistrict, Kuningan District (418 m above sea surface) West Java Province. Symptoms of the plant pest organisms which appear on the crops were observed. Subsequently, the extent and intensity of the pest attacks on the crops were quantified. Finally, the samples of the diseased crops and insects were identified at the laboratory using determination key identification. The insects which found on the wheat crops are some species of the Lepidoptera caterpillars and several species of aphids (Hemiptera: Aphididae), species of Oxya sp. (Orthoptera: Acrididae), Nezara viridula (Hemiptera: Pentatomidae), Leptocorisa oratorius (Hemiptera: Alydidae), white grub larvae (Coleoptera: Scarabaeidae), and stem borer. Pathogens which are found on the wheat crops: Fusarium sp., Helminthosporium sp., Phoma sp., Curvularia sp., and Alternaria sp.. The dominant pest in each location are different. The Oxya sp. is a dominant pest in Kuningan and attacks 100% of the sample area of the SO9 and Kasifbey wheat crops. On the other hand, Mythymna unipuncta is a dominant pest in Cisarua with more than 50% attacked area. Diseases of the wheat crops at both location are mostly caused by the Helminthosporium sp. with 100% diseases incidence. The Kasifbey is more frequently attacked by insects and pathogens than the SO9
Kunci Identifikasi Ordo Thysanoptera pada Tanaman Pangan dan Hortikultura
Full text linkThysanoptera is a minute insect. It acts as pest, plant virus vector and predator. In this research, the thrips on crop and horticulture have been collected at Bogor and its surrounding. The result of this research was found 16 specieses which is consist of two suborders, that are Tubulifera and Terebrantia. On this two subordos, there are three families, Phalaeothripide, Aeolothripidae and Thripidae. This research also present an identification key of Thysanoptera which is built from these 16 specieses. The images of thrips characters were captured with digital camera to complete the explanation of identification key.Keywords: horticulture, identification, plant crop, thysanopter
Keberadaan Dysmicoccus brevipes (Cockerell) (Hemiptera: Pseudococcidae) Sebagai Vektor Pineapple Mealybug Wilt-associated Virus (PMWaV) Pada Tanaman Nanas
No full textMealybug can almost be found in all pineapple fields (Ananas comosus (Linnaeus)). The insect is known to be a vector of Pineapple Mealybug wilt-associated Virus (PMWaV). The insect samples taken from pineapple in Bunihayu, Jalancagak, Subang, West Java, were identified in laboratory. Mealybug-ant symbionts were also taken. The ability of this ant to carry the mealybugs from colony reared on kabocha (Cucurbita maxima) to pineapple was also tested at green house level. Only one spesies of mealybug was found on pineapple, i.e. Dysmicoccus brevipes (Cockerell) (Hemiptera: Pseudococcidae). The mealybugs were found to colonize root, basal of stem and the leaf. Eight ant species were found to be associated with mealybug. There are four species belongs to Pseudolasius genera, two species Cardiocondyla genera, Paratrechina sp. and Dorylus sp. Paratrechina sp. showed the ability to carry D. brevipes from kabocha population to pineapple. Therefore the ants should also be controlled in the total management of PMWav
Identifikasi Hama Dominan Pada Tanaman Gandum di Bogor dan Kuningan - Jawa Barat
No full textGandum (Triticum aestivum L.) merupakan bahan dasar pangan kedua setelah beras. Roti dan mie merupakan makanan yang bahan dasamya terbuat dari tepung gandum. Pengembangan gandum di Indonesia sudah dirnulai pada tahun 70-an dan Indonesia dapat memperoleh panen perdana pada tahun 2002. Produksi gandum dalam negeri belum bisa memenuhi kebutuhan gandum nasional dan bergantung pada produksi gandum luar negeri. Salah satu penyebab terhambatnya pengembangan gandum nasional adalah iklim Indonesia dan adanya organisme pengganggu tanaman (OPT), keberadaan serangga hama merupakan salah satunya. Ulat dan Kutudaun merupakan serangga hama yang dominan menyerang tanaman gandum di Indonesia dan negara beriklim tropis lainnya. Identifikasi pada kedua jenis serangga hama tersebut penting untuk dilakukan guna mewaspadai keberadaan serangga hama ini pada lahan-Iahan gandum di Indonesia. Sampel diambil dari pertanaman gandum yang berada didaerah Cisarua Bogor dan Cilimus Kuningan, Jawa Barat. Hasil identifikasi menunjukkan ulat yang menjadi imago adalah spesies Mythimna unipuncta, Creatonotos transiens, Cnapaclorocis medinalis, Paralecta sp, Parnara bada, Orthiostola sp, Spodoptera sp, dan Potanthus sp, sedangkan kutudaun yang teridentiftkasi mencapai enam spesies yaitu Sitobion miscanthi, S. avenae, S. fragariae, Ropalosiphum padi, R. Rufiabdominalis, dan Hysteroneura setariae. Ulat yang paling dominan ditemukan dipertanaman gandum adalah Mytimna unipuncta dan Spodoptera sp, sedangkan kutudaun yang dominan adalah spesies S. avenae dan R. padi
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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