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"ABSTRAKPerubahan iklim (climate change) merupakan hal yang tidak dapat dihindari akibat pemanasan global dan diyakini akan berdampak luas terhadap berbagai aspek kehidupan, termasuk sektor pertanian. Perubahan pola curah hujan, peningkatan frekuensi kejadian iklim ekstem, serta kenaikan suhu udara dan permukaan air laut merupakan dampak serius dari perubahan iklim yang dihadapi Indonesia. Pertanian merupakan sektor yang mengalami dampak paling serius akibat perubahan iklim."

"The Timor Leste has been an independent state and is separated from Indonesia after referendum. It does not mean that people of the new state do not have relation with Indonesia such as trade, social and cultural relations, especially people staying in border areas. Beside nostalgia in the past to make both sides always do interactions in many things, trade contact conducted by the communities of the two regions due to the differences in potential resources and manufacture production. With these differences, transnational trading-which is the focus of this study-is something unavoidable both legal and illegal. The transnational trading appears if spesific commodity in a certain country can not be found in other countries, or although this commodity is resulted in the country, the volume is relative small so that the efforts to develop it need production cost which is more expensive than it if it is compared to importing attemps. The same case is the domestic commodity which can be sold to the foreign countries if the price of the commodity abroad is more expensive than it in the country. The above phenomenon happens both to Indonesian and Timor Leste people staying on the border areas. However, trading interaction of both sides is still on traditional system and in small volume. This economic activity is conducted just as subsistent economic and not commercial economic. This paper attempts to answer on why do trading activities be done, what kind of commodities which are traded, and who does get the opportunity from this activity? this paper is based on the field research to Belu District in 2005 and 2006, and is added with my literature study as well. "

"The objective of this study is to know effectiveness of various antagonist microorganism (Streptomyces sp., Bacillus subtilis, Pseudomonas fluorescens and Trichoderma sp.) for controlling leaf spot that caused by Phaeotrichocornis crotalariae on seedling of Acacia Crassicarpa. This study wwas caried out in two phases, they are in vitro antagonistic test and in vivo antagonistic test In Vitro antagonistic test was carried out according to multiple test method, a part of filterpaper 0,5 cm in diameter was dipped on to suspension of each microorganism that would be tested and then dried to be put in to a petridish that contain P.crotalariae 0,5 cm in diameter was dipped on to suspension of each microorganism that would be tested and then dried to be put in to a petridish that contain P. crotalariae 0,5 cm in diameter at PDA medium. Obeservation was carried out to know inhibiting capacity of antagonist microorganism. In the mean time, in vivo antagonistic test was carried out with spraying a suspension of each microorganism to seedling of A. crassicarpa and inoculate pathogen fungi. Observation was carried out according to multiple test method, a part of filterpaper 0,5 cm in diameter was dipped on to suspension of each microorganism that would be tested and then dried to be put in to a petridish that contain P.crotalariae 0,5 cm in diameter at PDA medium. Observaton was carried out to know inhibiting capacity of antagonist microorganism. In the mean time, in vivo antagonistic test was carried out with spraying a suspension of each microorganism to seedling of A. crassicarpa and inoculate pathogen fungi. Observation was carried out to know pathogen incubation periode, disease intensity and disease percentage. Result of in vitro antagonistic test showed that isolates of Streptomyces sp., B. subtilis, P.fluorescens and Trichoderma sp able to inhibit pathogen growth with capacity inhibiting 43.07%, 44.03%, 32.03% dan 53.23% by successively. In the mean time, in vivo antagonistic test showed that each of the microorganism antagonist able to lenghten incubation periode of control treatment is 4.1 days. Treatment of each application of the antagonist microorganism unable to depress disease intensity and disease percentage of P.crotalariae on seedling of A.crassicarpa. "