The objectives of the research were to study the shift of weed compositions in sweet corn field treated with organic compost and chemical weed controls and to compare the effect of treatment combinations on weed growth, weed biomass and sweet corn biomass. The research was conducted in Bengkulu, Indonesia, from April to July 2014. Results showed that the number of weed species decreased after the trials from 14 to 13. There was a shift in weed compositions because 5 species of weeds did not emerge after the trials, but 4 new species were found. Chemical weed control used a herbiside mixture of atrazine and mesotrione applied during postemergence was the most effective method to control weeds, which was observed on decreased weed emergence and weed biomass down to 22.33 and 25.00 percent of control, respectively. Subsequently, biomass production of sweet corn increased up to 195.64 percent at the same trials. Biomass of weeds and sweet corn were also affected by the organic composts. Weed biomass was inhibited by treatment of composted empty fruith bunches of oil palm, whereas significantly increased of sweet corn biomass were observed in the plots of organic manure.
Penyakit mosaik yang disebabkan oleh Cucumber mosaic virus (CMV) dan Chilli veinal mottle virus (ChiVMV) merupakan penyakit utama pada pertanaman cabai dan dilaporkan sudah tersebar luas di Indonesia. Penelitian bertujuan untuk mengetahui sebaran dan infeksi CMV dan ChiVMV pada cabai di Kabupaten Rejang Lebong, Bengkulu serta mengidentifikasi serangga yang diduga berperan sebagai vektornya. Penelitian dilakukan dengan mengumpulkan sampel tanaman cabai yang bergejala maupun tidak bergejala yang diambil secara diagonal pada tiap petak pengamatan di sentra sayuran Kabupaten Rejang Lebong. Keberadaan CMV dan ChiVMV pada sampel diuji secara serologi dengan DAS-ELISA. Hasil deteksi menunjukkan adanya infeksi ganda CMV dan ChiVMV di 3 lokasi dengan kejadian penyakit 20-50%. Kejadian infeksi ChiVMV (50-80%) di kabupaten Rejang Lebong ternyata lebih tinggi daripada CMV (20-50%), dan ditemukan di setiap lokasi survei. Serangga yang berhasil ditemukan di lokasi pengambilan sampel adalah Aphis gossypii.
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