Judul: Identification Keys of Whiteflies Using Single and Multiple Access on Cultivated Plants in Bogor and Surroundings
Abstrak: The whitefly (Hemiptera: Aleyrodidae) is one of the most important pest groups in agricultural crops. This pest is considered polyphagous because it has a wide host range and diverse species. Whiteflies can cause damage directly and indirectly to plants. Direct damage occurs because this pest pierces and sucks the phloem sap of the host plant, resulting in wilting, inhibited growth, and reduced productivity. The indirect damage caused by whitefly infestation involves the accumulation of honeydew produced by nymphs and adults for the growth of sooty mold and can transmit some viruses to plants. Whiteflies are relatively small and are difficult to distinguish from one another. Furthermore, there are limited taxonomic publications on whiteflies in Indonesia. Therefore, this research aims to build single access (dichotomous key) and multiple access (lucid key) identification keys for whiteflies on cultivated plants in Bogor and surrounding areas. Whitefly samples were collected in the field using purposive random sampling methods and later brought to the laboratory to prepare permanent microscope slides. Whitefly identification was based on the morphological characteristics observed from the pupal case or pupa of the whiteflies. Subsequently, single access and multiple access identification keys are created, and multiple access is generated using Lucid Builder 4.0 Software. A total of 21 whitefly species were identified, three species belonging to the Aleurodicinae subfamily and 18 species from the Aleyrodinae subfamily. One species from the Aleyrodine subfamily has yet to be identified. There are several new hosts that have been identified, including ylang-ylang and Jerusalem cherry as host plants for Aleurodicus dugesii, saliara, and jawer kotok as host plants for Bemisia tabaci. Besides that, there are the Geiger tree and red shoot flower as host plants for Aleurodicus dispersus. Both single-access and multi access identification keys for whiteflies were successfully developed. The multiple access key offers several advantages over the single access key, including practicality, flexibility, and ease of use.
Keyword: Important pest, lucid, polyphagous insects

Judul: Analisis keragaman dan stabilitas genetik temulawak (Curcuma xanthorriza Roxb.) Indonesia
Abstrak: Study on The Identification of Parasitoids and Predators of White Fly on Mulberry Plant was conducted at Bogor, Sukabumi and Tasikmalaya as well as Pati and Candiroto on sericulture developing centers of West Java and Central Java, respectively. The main objectives of the study were to confirm the species of white fly and also to confirm whether there is any parasitoid as well as predator attacking the pest in all the study sites. To achieve the targeted output of the study the following methods were conducted. The collected whiteflies from all study sites were send to entomological laboratory of Bogor Agriculture University, while the collected parasitoids and predator were send to National Entomological Museum at Bogor. To proof an insect to be parasitoid of the whitefly, in captive method was practiced. While to proof an insect to be predator of the fly, the bait method was practiced. The result of the study showed that white attacking mulberry plant at study sites is Trialeurodes vaporarium Martin. There are four species parasitoids namely Ceraphronid, Scelionid, Eucoilid and Eulophid and four species of predacious Coccinelid namely Serangium spp and Micraspis sp.
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Judul: Hydroxyapatite-Chitosan Composite Coating on Stainless Steel 316 to Improve Corrosion Resistance
Abstrak: Metals that were used in bone implantation should have good corrosion resistance that were not easily corroded when implanted into the body. Metal corrosion resistance of stainless steel 316 can be enhanced through the metal coating by hydroxyapatite-chitosan composite with composition ratio of hydroxyapatite (gram) and chitosan 3% (mL) 0.2:0, 0.2:0.1, 0.2:0.5, 0.2:1.0, and 0.2:1.5. Besides improving the corrosion resistance of metal, the presence of chitosan also maintain the position of hydroxyapatite on metal surfaces. Corrosion resistance increases with increasing amount of chitosan added and the best composition of hydroxyapatite-chitosan composite was 0.2:1.0.
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