Species identification, host range, and identification key of whiteflies of Bogor and surrounding area.Whitefly (Hemiptera: Aleyrodidae) is a group of insects that are small, white, soft-bodied, and easily found on various agricultural crops. Whitefly is a phytophagous insect; some species are important pests in agricultural crops that can cause direct damage and can become vectors of viral diseases. The last few years the damage caused by whitefly in Indonesia has increased. Unfortunately, information about their species and host plants in Indonesia, including in Bogor, is still limited. Kalshoven, in his book entitled Pest of Crops in Indonesia, published in the 1980s reported that there were 9 species of whitefly in Indonesia. The information on the book should be reconfirmed. Therefore, this study was conducted to determine whitefly species and its host plants in Bogor and its surroundings. Whiteflies is identified based on the 'puparia' (the last instar of the nymph) collected from various agricultural plants, ornamental plants, weeds, and forest plants. A total of 35 species of whiteflies were collected from 74 species and 29 families of plants. The collwcted whiteflies consist of four species belong to Subfamily Aleurodicinae and 31 species of Subfamily Aleyrodinae. The most often found whitefly species were Aleurodicus dispersus, A. dugesii, and Bemisia tabaci. A dichotomous identification key of whiteflies was completed based on morphological character of 35 collected species. The number of whitefly species in Bogor and surrounding areas were far exceeded the number of species reported previously by Kalshoven from all regions in Indonesia. ABSTRAKSpesies, kisaran inang, dan kunci identifikasi kutukebul di Bogor dan sekitarnya. Kutukebul (Hemiptera: Aleyrodidae) merupakan kelompok serangga yang berukuran kecil, berwarna putih, bertubuh lunak, dan mudah ditemukan di berbagai tanaman pertanian. Kutukebul merupakan serangga fitofag, beberapa spesies merupakan hama penting pada tanaman pertanian yang dapat menyebabkan kerusakan langsung dan dapat menjadi vektor penyakit yang disebabkan oleh virus. Beberapa tahun terakhir kerusakan yang diakibatkan oleh kutukebul pada tanaman pertanian di Indonesia mengalami peningkatan. Namun informasi mengenai spesies dan tanaman inang kutukebul di Indonesia, termasuk di Bogor, masih terbatas. Kalshoven, dalam bukunya yang berjudul Pest of Crops in Indonesia yang diterbitkan pada tahun 1980an melaporkan terdapat 9 spesies kutukebul di Indonesia. Informasi pada buku tersebut dirasa tidak sesuai dengan kenyataan di lapangan, untuk itu perlu dilakukan penelitian tentang jenis-jenis kutukebul dan tanaman inangnya. Penelitian ini bertujuan untuk mengetahui spesies dan tanamnan inang kutukebul di Bogor dan sekitarnya. Kutukebul diidentifikasi berdasarkan kantung 'pupa' (instar terakhir nimfa) yang dikumpulkan dari berbagai tanaman pertanian, tanaman hias, gulma, dan tumbuhan hutan. Sebanyak 35 spesies kutukebul dikoleksi dari 74 spesies dan 29 famili tanaman. Empat spesies kutukeb...
Paraquat dichloride is a non-selective contact herbicide currently used by farmers in Indonesia to control weeds on plantations, such as palm oil, rubber, and cocoa. There are only a few studies to date on the eco-toxicological aspects of paraquat. Therefore, the research aim was study the effect of paraquat application on soil arthropods on three commodities. The research conducted on the rice and corn fields, and oil palm plantations in two consecutive seasons. Treatments included three paraquat concentrations (4, 8, and 16 ml/l); carbendazim (2 g/l); and control, with five replicates. The number and abundance of soil arthropods observed using pitfall traps and the collection of outermost soil layers for each crop at 0, 2, 4, 8, and 12 weeks after application. The order number of soil arthropods collected from rice, oil palms, and corn in season 1 was 12, 13, and 16, respectively; and 10, 16, and 16 in season 2. The three most dominant groups of soil arthropods were collembola, mites, and ants. The population patterns of soil arthropods for those three commodities were similar. Paraquat was thought to be toxic to non-target organism, such as terrestrial arthropods. This research showed that paraquat had an effect on the presence and population of soil arthropods for certain time after application. However, after 8 to 12 weeks after application, the population increased slightly.
Pesticides are chemicals or biological agents that farmers commonly use to control pests. Consequently, pesticides may contaminate agricultural products after application and also contaminate other commodities because of their high persistence. This research determined the pesticide contamination of two active ingredients, imidacloprid, and deltamethrin, in honey obtained from four beekeeping in Java. The honey samples of as much as 250g were collected from beekeeping of honeybee (Apis mellifera) in Blora-Central Java and Subang-West Java, also stingless bee (Tetragonula laeviceps) in Sumedang and Banten, West Java. Residue analysis was performed using the LC-MS/MS method in Saraswanti Indo Genetech, Bogor. The beekeeping location was around 500 to 1000 meters from cultivation plants, such as chili, shallot, and rice. Based on residue analysis results, the active ingredient was undetected, or the content of the detected active ingredient was below the limit of detection/LOD (<0.001 mg/kg of imidacloprid; <0.0039 mg/kg of deltamethrin). In addition, the LOD that can be detected was also underneath the maximum residue limit/MRL (0.05 mg/kg of imidacloprid; 0.03 mg/kg of deltamethrin). Therefore, honey from beekeeping was still secure for consumption. Even though all beekeeping locations were close to crops, the bees did not carry contaminated nectar from crops.
Paraquat dichloride is a non-selective contact herbicide commonly used in oil palm plantations. It causes the leaves to wilt quickly, dehydrate, and eventually die. The aim of this study was to evaluate the extent of paraquat residues in oil palm fruits. The study has conducted from November 2019 to February 2020. Fruit samples were collected from oil palm plantations in three provinces (North Sumatra, Jambi, and West Kalimantan). Paraquat is applied two times per year with a high volume spraying dose of one liter per hectare. The last application of paraquat dichloride was 30 days before harvest in North Sumatra and Jambi, and 14 days in West Kalimantan. The samples were taken randomly from five trees aged eight years (TM-8), then mixed for analysis. The result showed that paraquat residue content was undetected at the analytical detection limit of 0.0151 ppm. It means that the paraquat residue was below the detection level or that there was no residue in the oil palm fruits. As a result, the application of paraquat to control the weeds around the plantation leaves no residue in oil palm fruits.
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