Smallholder-dominated agricultural mosaic landscapes are highlighted as model production systems that deliver both economic and ecological goods in tropical agricultural landscapes, but trade-offs underlying current land-use dynamics are poorly known. Here, using the most comprehensive quantification of land-use change and associated bundles of ecosystem functions, services and economic benefits to date, we show that Indonesian smallholders predominantly choose farm portfolios with high economic productivity but low ecological value. The more profitable oil palm and rubber monocultures replace forests and agroforests critical for maintaining above- and below-ground ecological functions and the diversity of most taxa. Between the monocultures, the higher economic performance of oil palm over rubber comes with the reliance on fertilizer inputs and with increased nutrient leaching losses. Strategies to achieve an ecological-economic balance and a sustainable management of tropical smallholder landscapes must be prioritized to avoid further environmental degradation.

Coffee of Liberika Tungkal Komposit (Libtukom) is a superior commodity that adapts well to the peatlands in West Tanjung Jabung Regency, Jambi Province. Libtukom coffee, which has a distinctive flavor, is the main source of income for the community in Tanjung Jabung Barat Regency. The problems in the cultivation of Libtukom coffee include pests and diseases. This study aimed to provide information on the type of pests and diseases that attack Libtukom coffee. The study was conducted in March-September 2017. Data were obtained from direct observation (primary data) and other sources (secondary data). Data were analyzed descriptively. The results showed that some of the pests that attack Libtukom Coffee were coffee fruit borer, white lice, and stem borer, with intensity of mild-moderate attacks. Diseases that can infect leaves Libtukom Coffee were mainly (rust and red rust) and roots (root fungi). White root fungus attack is the main problem of Libtukom coffee in peatland, Jambi Province. Farmers generally recognize the root fungus infection, which was already found in more than 30% of the plant population.

No abstract

Ulat grayak Spodoptera frugiperda yang dikenal dengan nama Fall Armyworm (FAW) merupakan hama asli daerah tropis dari Amerika, namun pada bulan Maret 2019 hama ini telah masuk dan menyerang pertanaman jagung yang ada di Indonesia. Penelitian ini bertujuan untuk mengetahui tingkat kerusakan beberapa varietas tanaman jagung (Zea mays) yang diserang hama ulat grayak (Spodoptera frugiperda J.E. Smith). Lokasi penelitian dilakukan di Laboratorium Hama Balai Pengkajian Teknologi Pertanian Kota Jambi selama bulan Juli 2019 hingga Agustus 2019. Bahan yang digunakan yaitu tanaman jagung varietas Nasa 29, Bisi 2, Srikandi Kuning, Sukmaraga, Bisma, dan Lamuru umur 2 minggu setelah semai. Larva FAW instar 3. Penelitian dilakukan dengan menggunakan metode Rancangan Acak Lengkap (RAL) dengan 6 perlakuan dan 3 ulangan. Setiap varietas tanaman jagung diinfestasikan 1 larva dan diamati tingkat kerusakannya setiap hari selama larva berada pada fase instar 3. Hasil penelitian kerusakan tanaman jagung pada semua varietas yang diinfestasi ulat grayak S. frugiperda menunjukkan tidak berpengaruh nyata, namun pada jagung varietas Bisi 2 menyebabkan kerusakan paling parah dibandingkan dengan varietas lain dengan tingkat kerusakan sebesar 49,13 %. Varietas Srikandi Kuning memiliki persentase kerusakan 38,06%, Nasa 29 sebesar 28,99 %, Bisma sebesar 28,90%, Lamuru sebesar 38,58% dan varietas yang persentase kerusakan terendah adalah Sukmaraga dengan 27,51%.

Rubiana et al, 2018. The Assessment of  Insect Diversity and Community Structure in the Former Area of Coal Mining Reclamation in Muaro Jambi District, Jambi Province. JLSO 7(1): Recovery of land and ecosystems in the form of reclamation is expected to restore lost biodiversity. The success of reclamation can be seen from the recovery of ecosystems and biodiversity in it. However, the study of biodiversity on reclaimed land in Indonesia is still limited to vegetation and has not seen groups of animals especially insects. Insects have a very important functional role in the ecosystem, therefore they can be used as objects of diversity studies in the reclamation area. This study aimed to study the diversity and functional role of insects in the reclamation area. The study was conducted in the reclamation area of a former coal mine in Muaro Jambi Regency. The study area consisted of two different revegetation ages and two different plants. The method of insect collection is by installing pitfall traps with five replications for 2 x 24 hours. The insects were collected from the pitfall trap then identified to the morphospecies level. The results showed that most of the Coleoptera, Diptera, Hymenoptera and Othroptera insects were found in the reclamation area. Insect diversity is influenced by the age of reclamation. One year of reclamation had a lower species than insect age of two years. Based on the results of the analysis show that the composition of insect species showed differences at different reclamation ages. The older the age of reclamation, the composition of insect species tended to resemble the composition of insect species in the forest.