EFFECTS OF SOIL SOLARISATION, BAGASSE AMENDMENT AND FUNGICIDE ON FUSARIUM POPULATIONS AND WEED CONTROL IN SUGARCANE FIELDS

摘要

The effects of soil solarisation, bagasse amendment and benomyl application on Fusarium spp. and possible weed control in sugarcane fields were evaluated. Bagasse (40 t/ha) and benomyl (10 kg/ha) were incorporated alone or with transparent polyethylene sheet (70 μm) tarping. The treatments were applied for a month and then soil samples obtained from 5, 10, 20 and 30 cm depths. Propagule numbers of Fusarium spp. were estimated through dilution plating on selective Nash/Snyder medium. Propagules of Fusarium spp. in all treated soils were significantly decreased at all depths as compared with the untreated control in one experiment. Population reductions were less in a second experiment. Pokkah boeng incidence was reduced by the solarised, bagasse + solarised and benomyl + solarised treatments. Furthermore, weed populations in the bagasse, bagasse + solarised and solarised treatments were also significantly reduced in comparison with the control.