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Abstrak :
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.

Abstrak :
ABSTRAK
Perubahan 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.

Abstrak :
Farming systems research posits that to contribute towards sustainable rural development, both interdisciplinary collaborations and local actor engagement are needed. Together, they allow for changes in understanding and changes in practices. This book gives an overview of the insights generated in 20 years of farming systems research. It retraces the emergence and development of farming systems research in Europe, summarises the state-of-the-art for key areas, and provides an outlook on new explorations, especially those tackling the dynamic nature of farming systems and their interaction with the natural environment and the context of action.