Resistensi Beberapa Klon Teh (Camellia Sinensis L.) Terhadap Serangan Tungau Jingga (Brevipalpus Phoenicis Geijsk)

ANITA HANNA ATMOWIDJOJO. 1985. Resistancy of some tea (Camellia sinensis L.) clones to scarlet mites (Brevipalpus phoenicis Geijsk). Berita Biologi 3 (1) : 1-4. Scarlet mite (Brevipalpus phoenicis Geijsk) is an important pest of tea culture in Indonesia. Several means can be used to control this pest such as the use of pesticides, biological control, and the use of tea resistant clones.The last mentioned method is considered to be the best and the most effective.Most of the tea estates in Indonesia nowadays use clones as new planting materials and their resistance to scarlet mite is known to vary.In the present study, sixteen clones were compared for their resistance.The results showed that clones PS 324 and TRI 2024 were the most resistant to scarlet mite nfestations

Tanaman Berperawakan Sedang Dan Tinggi Di Pekarangan Teluknaga, Citeureup Dan Pacet

S. ATMOWIDJOJO & Z. FACHRUROZI. 1985. Plants with medium and tall statures in the kitchen gardens in Teluknaga, Citeureup and Pacet. Berita Biologi 3(2): 37 - 48. Analyses on plants of kitchen gardens showed the presence of 25 species of middle-stratum and 23 species of higher stratum in three studied localities. For the middle-stratum, only 28% were found in common, while the higher stratum 21.73%. Bananas were the most common middle-stratum found in 3 localities, coconut and mango tiees were the most common in Teluknaga, and rarnbutans in Citeureup. Fertilizers were used only at the most 25%, but for clove and citrus trees in Citeureup and Pacet by more than 50% growers. Most of the fertilizer used was manure, but for higher stratum plants in Teluknaga synthetic fertilizers were used more. Pest management was not commonly practiced. If done, synthetic insecticides were generally used

Serangga Perombak Bahan Organik Di Pekarangan Teluknaga, Citeureup Dan Pacet

M. AMIR & ANITA H. ATMOWIDJOJO.1985. Insect decomposers of organic materials in the kitchen gardens in Teluknaga, Citeureup and Pacet.Berita Biologi 3 (2) : 66 - 69. Studies on insect decomposers of home gardens at Teluknaga, Citeureup and Pacet were carried out to obtain information on their distribution and species diversity on plant and animal litters.The result indicated that the species composition of the insect decomposer at the three places (kecamatan) were not significantly different. It seemed that the insects were not affected by the different ground cover vegetation. Among the insect decomposers, termites were the most important. These insects were found to occupy different types of litters. The other insect decomposers, e.g. Gryllotafpa sp., Copris sp. and a species of Nitidulidae, were found in plant and animal litteis

RESISTENSI BEBERAPA KLON TEH (CAMELLIA SINENSIS L.) TERHADAP SERANGAN TUNGAU JINGGA (BREVIPALPUS PHOENICIS GEIJSK)

ANITA HANNA ATMOWIDJOJO. 1985. Resistancy of some tea (Camellia sinensis L.) clones to scarlet mites (Brevipalpus phoenicis Geijsk). Berita Biologi 3 (1) : 1-4. Scarlet mite (Brevipalpus phoenicis Geijsk) is an important pest of tea culture in Indonesia. Several means can be used to control this pest such as the use of pesticides, biological control, and the use of tea resistant clones.The last mentioned method is considered to be the best and the most effective.Most of the tea estates in Indonesia nowadays use clones as new planting materials and their resistance to scarlet mite is known to vary.In the present study, sixteen clones were compared for their resistance.The results showed that clones PS 324 and TRI 2024 were the most resistant to scarlet mite nfestations

Komunitas Serangga Air Di Sungai Hutan Ketambe, Taman Nasional Gunung Leuser, Aceh.

S. WIRJOATMODJO & ANITA HANNA ATMOWIDJOJO. 1985. Insect community of stream ecosystem of Ketambe forest, Gunung Leuser National Park, Aceh, Berita Biologi 3.(3) : 111 -115.Non-strictly seasonal study on the insect community of stream ecosystem at Ketambe forest, Gunung Leuser National Park,Aceh was undertaken from September 1980 to February 1983,with the aim of providing base line data of the local stream ecosystem. Thirty two species of benthic insects were recorded from the depth between 5--30 cm.They belong to the orders of Diptera, Odonata, Kphemeroptera, Coleoptera, Plecoptera, Hemiptera, Megaloptera and Trichoptera. The number of species found was higher during the beginning of the dry than that of the rainy season (96,9% vs 59,4% of the total). Diptera and Odonata showed the highest number of species (8) among the orders, whereas Trichoptera was the lowest (one species). However, in term of frequency of occurence and abundance, the Trichoptera species, Hydropsyche sp,, was the highest, followed by Neoperla sp. (Flecoptera). There was a tendency of seasonal fluctuation in species number and life cycle in several species. Bottom structures containing pebbles, boulders of various sizes and leaf litter for shelter and feeding site, appeared to be the best habitat. Species composition or number varied with stations. However, diversity indexes among stations were more or less similar, and all of them were low

Japan Initiatives of Climate Change Adaptation for Paddy Rice Commodity

This study was supported by the Experienced-Based Learning scheme of Asian Future Leaders Scholarship Program in Kyoto University (Bai Xian Asia Institute).As one of the most consumed staple crops, rice is susceptible to climate change, emphasizing the crucial need to promote the climate adaptation of rice to ensure sustainable food security. This research aims to study the climate change impact and mitigation measures in rice commodity from Japan's perspective to serve as reference for other rice-producing countries. A study case is conducted in Hyogo Prefecture, Japan. Combining literature study and interviews, this study found increasing temperature and unstable rainfall as the most impacting climate change factors to rice commodity. These factors cause decreased yield and quality in the study case area. To mitigate the impacts, several countermeasures have been implemented in Japan e.g. water management, cultivation schedule adjustment, fertilizer management, and introduction of heat-resistant cultivar. Both the literature and the interviewees agreed that while introduction of heat-resistant cultivar is the most efficient measure, it bears the highest cost, resources, and time. All in all, climate change impacts in general and vulnerability of paddy rice commodity to the impacts are relatively well observed in Japan as shown from the established tracking system and database. The mitigation measures are done in top-down approach and supported by a bottom-up manner with an organized distribution of responsibilities among the stakeholders

Serangga-serangga Berkemampuan Merusak Pada Tanaman Pekarangan Di Teluknaga, Citeureup Dan Pacet

ANITA H. ATMOWIDJOJO, S. ADISOEMARTO & M. AMIR. 1985. Potential insect pests on vegetations of home gardens in Teluknaga, Citeureup and Pacet. Berita Biologi 3 (2) : 55 - 65. A total of 60 species of insects were recorded associated with 78 species of plants in three research localities. However, not all of these species were distributed equally, either in space or time. Many were found specific on certain host plants for the localities. On the other hand, there were host plants that harboured specific insect pests. It was also found that the seriousness of damage was not related to the specificity (in either way). A serious pest on certain host was not necessarily a serious pest on other host plants

KOMUNITAS SERANGGA AIR DI SUNGAI HUTAN KETAMBE, TAMAN NASIONAL GUNUNG LEUSER, ACEH.

S. WIRJOATMODJO & ANITA HANNA ATMOWIDJOJO. 1985. Insect community of stream ecosystem of Ketambe forest, Gunung Leuser National Park, Aceh, Berita Biologi 3.(3) : 111 -115.Non-strictly seasonal study on the insect community of stream ecosystem at Ketambe forest, Gunung Leuser National Park,Aceh was undertaken from September 1980 to February 1983,with the aim of providing base line data of the local stream ecosystem. Thirty two species of benthic insects were recorded from the depth between 5--30 cm.They belong to the orders of Diptera, Odonata, Kphemeroptera, Coleoptera, Plecoptera, Hemiptera, Megaloptera and Trichoptera. The number of species found was higher during the beginning of the dry than that of the rainy season (96,9% vs 59,4% of the total). Diptera and Odonata showed the highest number of species (8) among the orders, whereas Trichoptera was the lowest (one species). However, in term of frequency of occurence and abundance, the Trichoptera species, Hydropsyche sp,, was the highest, followed by Neoperla sp. (Flecoptera). There was a tendency of seasonal fluctuation in species number and life cycle in several species. Bottom structures containing pebbles, boulders of various sizes and leaf litter for shelter and feeding site, appeared to be the best habitat. Species composition or number varied with stations. However, diversity indexes among stations were more or less similar, and all of them were low

SERANGGA PEROMBAK BAHAN ORGANIK DI PEKARANGAN TELUKNAGA, CITEUREUP DAN PACET

M. AMIR & ANITA H. ATMOWIDJOJO.1985. Insect decomposers of organic materials in the kitchen gardens in Teluknaga, Citeureup and Pacet.Berita Biologi 3 (2) : 66 - 69. Studies on insect decomposers of home gardens at Teluknaga, Citeureup and Pacet were carried out to obtain information on their distribution and species diversity on plant and animal litters.The result indicated that the species composition of the insect decomposer at the three places (kecamatan) were not significantly different. It seemed that the insects were not affected by the different ground cover vegetation. Among the insect decomposers, termites were the most important. These insects were found to occupy different types of litters. The other insect decomposers, e.g. Gryllotafpa sp., Copris sp. and a species of Nitidulidae, were found in plant and animal litteis

TANAMAN BERPERAWAKAN SEDANG DAN TINGGI DI PEKARANGAN TELUKNAGA, CITEUREUP DAN PACET

S. ATMOWIDJOJO & Z. FACHRUROZI. 1985. Plants with medium and tall statures in the kitchen gardens in Teluknaga, Citeureup and Pacet. Berita Biologi 3(2): 37 - 48. Analyses on plants of kitchen gardens showed the presence of 25 species of middle-stratum and 23 species of higher stratum in three studied localities. For the middle-stratum, only 28% were found in common, while the higher stratum 21.73%. Bananas were the most common middle-stratum found in 3 localities, coconut and mango tiees were the most common in Teluknaga, and rarnbutans in Citeureup. Fertilizers were used only at the most 25%, but for clove and citrus trees in Citeureup and Pacet by more than 50% growers. Most of the fertilizer used was manure, but for higher stratum plants in Teluknaga synthetic fertilizers were used more. Pest management was not commonly practiced. If done, synthetic insecticides were generally used